阅读说明：本技术 一种Ti-Al-Nb-Zr-Mo合金热轧板材的短流程制备方法 (Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy hot rolled plate ) 是由 张玉勤 张关梅 邓亚杰 蒋业华 于 2020-11-23 设计创作，主要内容包括：本发明涉及一种Ti-Al-Nb-Zr-Mo合金热轧板材的短流程制备方法,其特征在于包括下列各步骤：1)备料,2)混料、压块,3)装料至电子束枪EB炉中,4)真空熔炼得Ti-Al-Nb-Zr-Mo合金扁锭,5)加热至950～1050℃,保温6～7h,送入轧机上进行一火8道次轧制,6)加热至940～965℃,保温2～3h,送入轧机上进行二火7道次轧制,7)加热至920～930℃,保温1～2h,送入轧机上进行三火6道次轧制,8)在860～910℃下保温1～3h进行退火,冷却至室温后进行修磨、酸洗、矫直、剪切处理,得Ti-Al-Nb-Zr-Mo合金板材。通过缩短制造工艺流程,热轧板材综合成材率提高到80%左右,加工成本降低20～30%。(The invention relates to a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate, which is characterized by comprising the following steps: 1) preparing materials, 2) mixing and briquetting, 3) charging into an electron beam gun EB furnace, 4) carrying out vacuum melting to obtain a Ti-Al-Nb-Zr-Mo alloy slab ingot, 5) heating to 950-1050 ℃, preserving heat for 6-7 h, feeding into a rolling mill for carrying out rolling for 8 times with one fire, 6) heating to 940-965 ℃, preserving heat for 2-3 h, feeding into the rolling mill for carrying out rolling for 7 times with two fire, 7) heating to 920-930 ℃, preserving heat for 1-2 h, feeding into the rolling mill for carrying out rolling for 6 times with three fire, 8) preserving heat for 1-3 h at 860-910 ℃ for annealing, cooling to room temperature, and then carrying out coping, pickling, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate. By shortening the manufacturing process flow, the comprehensive yield of the hot rolled plate is improved to about 80%, and the processing cost is reduced by 20-30%.)

1. A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate is characterized by comprising the following steps:

(1) the materials are mixed according to the following mass ratio:

5.7-6.3 wt.% of aluminum niobium alloy

Aluminum bean 4.05-4.77 wt. -%)

Zirconium sponge 1.5-2.5 wt. -%)

1.5-1.7 wt.% of aluminum-molybdenum alloy

Titanium sponge balance

The total of the components is 100 wt.%;

(2) mixing the prepared materials in the step (1), taking a proper amount of mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100-120 ℃ for 5-6 h, and cooling the blocks along with a furnace to obtain pressed blocks;

(3) flatly paving the bulk material in the step (2) in an EB furnace cooling bed provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;

(4) under a vacuum of 1.8X 10^-3～3.5×10^-3When torr, starting No. 1 to No. 5 electron guns to smelt the bulk material in the cooling bed, controlling the voltage of No. 1 to No. 5 electron guns to be 29.5 to 30.5KV, controlling the current to be 3.3 to 4.3A, smelting for 100 to 120min,closing an electron gun, cooling for 20-40 min, pushing the pressed block material into a melting zone, simultaneously starting No. 1-7 electron guns to continuously melt, controlling the voltage of No. 1-7 electron guns to be 29.5-30.5 KV, the current of No. 1-2 electron guns to be 2.3-3.0A, the current of No. 3-4 electron guns to be 5.3-6.0A, the current of No. 5 electron guns to be 3.6-4.6A and the current of No. 6-7 electron guns to be 1.6-2.6A, and simultaneously keeping the ingot pulling speed of 8-12 mm/min, so as to continuously push, melt and pull ingots until the melting is completed, then cooling to 80-100 ℃, taking out the ingots from a crystallizer, cooling to room temperature, and carrying out surface peeling and polishing treatment to obtain Ti-Al-Nb-Zr-Mo alloy flat ingots;

(5) spraying a proper amount of anti-oxidation liquid on the surface of the alloy slab ingot in the step (4), feeding the alloy slab ingot into a heating furnace, heating to 950-1050 ℃ at a heating rate of 4-6 ℃/min, preserving heat for 6-7 h, feeding the alloy slab ingot into a rolling mill, carrying out one-fire 8-pass rolling, controlling the deformation rate of a rolling process to be 55-59%, and obtaining a one-fire rolling plate with the thickness of 82-89 mm after rolling;

(6) feeding the first-fire rolled plate obtained in the step (5) into a heating furnace, heating to 940-965 ℃, preserving heat for 2-3 hours, feeding the heated first-fire rolled plate into a rolling mill, and carrying out two-fire 7-pass rolling, wherein the deformation rate of a rolling process is controlled to be 75-82%, and the thickness after rolling is 15-22 mm, so as to obtain a second-fire rolled plate;

(7) feeding the two-fire rolled plate in the step (6) into a heating furnace, heating to 920-930 ℃, preserving heat for 1-2 hours, feeding the two-fire rolled plate into a rolling mill, and carrying out three-fire 6-pass rolling, wherein the deformation rate of a rolling process is controlled to be 53-77%, and the thickness after rolling is 5-7 mm, so as to obtain a three-fire rolled plate;

(8) and (3) preserving the heat of the hot rolled plate in the step (7) for 1-3 h at 860-910 ℃, annealing, cooling to room temperature, and then carrying out coping, acid pickling, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate.

2. The short-run production method of a Ti-Al-Nb-Zr-Mo alloy hot-rolled plate according to claim 1, characterized in that the anti-oxidation liquid in step (5) is a commercially available lead-free water-based paint which is non-toxic and pollution-free, and can improve the flow of metal while controlling the surface oxidation and blocking the block hydrogen permeation, and the paint is sprayed on the surface of a Ti-Al-Nb-Zr-Mo alloy slab by a conventional airless spraying system, and is fed into a heating furnace after being dried in air.

3. The short-run production method of hot-rolled Ti-Al-Nb-Zr-Mo alloy plate according to claim 1, wherein in the step (5), the deformation ratios of the 8 passes of the one-pass rolling are distributed as follows: 4-6%, 7-9%, 10-12%, 11-13%, 10-14%, 12-14%, 9-10%, 7-9%.

4. The short-run production method of hot-rolled Ti-Al-Nb-Zr-Mo alloy plate according to claim 1, wherein in the 7 passes of the second-fire rolling in the step (6), the deformation ratios of the two passes are distributed as follows: 11-13%, 17-20%, 20-25%, 20-23%, 20-29%, 18-24%, 15-22%.

5. The short-run production method of hot-rolled Ti-Al-Nb-Zr-Mo alloy plate according to claim 1, wherein the deformation ratios of the three-pass rolling in step (7) in 6 passes are distributed as follows: 13-28%, 15-25%, 18-25%, 11-23%, 7-19%, 5-14%.

6. The short-run production method of a hot-rolled Ti-Al-Nb-Zr-Mo alloy sheet according to claim 1, wherein the Ti-Al-Nb-Zr-Mo alloy sheet obtained in the step (8) has the following components: al: 5.5-6.5 wt.%, Nb: 2.5-3.5 wt.%, Zr: 1.5-2.5 wt.%, Mo: 0.6-1.5 wt.%, and the balance Ti.

Technical Field

The invention relates to a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate, belonging to the technical field of alloy material rolling.

Background

The Ti-6Al-3Nb-2Zr-1Mo titanium alloy (namely TA31 titanium alloy) not only has low density, high specific strength, good plasticity and strong corrosion resistance, but also has excellent performances of seawater scouring resistance, no magnetism, high stress corrosion fracture toughness, impact toughness, weldability and the like, particularly has outstanding seawater resistance and marine atmospheric corrosion resistance, is an excellent light plate in the fields of manufacturing submarines, ships, torpedoes, deep submergence vehicles, marine oil drilling platforms, marine engineering equipment, offshore facilities and the like, and has wide application prospect.

The existing process for preparing the TA31 titanium alloy hot rolled plate comprises the following steps: firstly, mixing titanium sponge and alloy raw materials, then pressing and welding the mixture into an electrode, smelting the electrode into a flat ingot through a vacuum consumable electrode (VAR) for 2-3 times, then forging and cogging the flat ingot, and finally carrying out hot rolling to prepare plates with different specifications and purposes. The process has the defects of long flow, low comprehensive yield, high processing cost and the like, so that the manufacturing cost of the plate is high, and the application is greatly limited. There is therefore a need for improvements in the prior art.

Disclosure of Invention

The invention provides a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot-rolled plate, which overcomes the defects in the existing titanium alloy plate preparation.

The invention is realized by the following technical scheme: a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate is characterized by comprising the following steps:

(1) the materials are mixed according to the following mass ratio:

5.7-6.3 wt.% of aluminum niobium alloy

Aluminum bean 4.05-4.77 wt. -%)

Zirconium sponge 1.5-2.5 wt. -%)

1.5-1.7 wt.% of aluminum-molybdenum alloy

Titanium sponge balance

The total of the components is 100 wt.%;

(2) mixing the prepared materials in the step (1), taking a proper amount of mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100-120 ℃ for 5-6 h, and cooling the blocks along with a furnace to obtain pressed blocks;

(3) flatly paving the bulk material in the step (2) in an EB furnace cooling bed provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;

(4) under a vacuum of 1.8X 10^-3～3.5×10^-3When torr, opening No. 1 to No. 5 electron guns to smelt the bulk material in the cooling bed, controlling the voltage of No. 1 to No. 5 electron guns to be 29.5 to 30.5KV, controlling the current to be 3.3 to 4.3A, after smelting for 100 to 120min, closing the electron guns, after cooling for 20 to 40min, pushing the pressed block material into a smelting area, meanwhile, opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 29.5 to 30.5KV, the current of No. 1 to No. 2 electron guns to be 2.3 to 3.0A, the current of No. 3 to No. 4 electron guns to be 5.3 to 6.0A, the current of No. 5 electron guns to be 3.6 to 4.6A, and the current of No. 6 to No. 7 electron guns to be 1.6 to 2.6A, meanwhile, keeping the ingot pulling speed of 8-12 mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 80-100 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and carrying out surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy slab ingot;

(5) spraying a proper amount of anti-oxidation liquid on the surface of the alloy slab ingot in the step (4), feeding the alloy slab ingot into a heating furnace, heating to 950-1050 ℃ at a heating rate of 4-6 ℃/min, preserving heat for 6-7 h, feeding the alloy slab ingot into a rolling mill, carrying out one-fire 8-pass rolling, controlling the deformation rate of a rolling process to be 55-59%, and obtaining a one-fire rolling plate with the thickness of 82-89 mm after rolling;

(6) feeding the first-fire rolled plate obtained in the step (5) into a heating furnace, heating to 940-965 ℃, preserving heat for 2-3 hours, feeding the heated first-fire rolled plate into a rolling mill, and carrying out two-fire 7-pass rolling, wherein the deformation rate of a rolling process is controlled to be 75-82%, and the thickness after rolling is 15-22 mm, so as to obtain a second-fire rolled plate;

(7) feeding the two-fire rolled plate in the step (6) into a heating furnace, heating to 920-930 ℃, preserving heat for 1-2 hours, feeding the two-fire rolled plate into a rolling mill, and carrying out three-fire 6-pass rolling, wherein the deformation rate of a rolling process is controlled to be 53-77%, and the thickness after rolling is 5-7 mm, so as to obtain a three-fire rolled plate;

(8) and (3) preserving the heat of the hot rolled plate in the step (7) for 1-3 h at 860-910 ℃, annealing, cooling to room temperature, and then carrying out coping, acid pickling, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate.

The anti-oxidation liquid in the step (5) is a commercially available lead-free water-based paint which is non-toxic and pollution-free, the surface oxidation is controlled, the hydrogen permeation of the block material is prevented, and the metal flow can be improved at the same time.

In the step (5), in 8 passes of one-fire rolling, the deformation rate distribution of each pass is as follows: 4-6%, 7-9%, 10-12%, 11-13%, 10-14%, 12-14%, 9-10%, 7-9%.

In the 7 secondary-heat rolling passes in the step (6), the deformation rate distribution of each pass is as follows in sequence: 11-13%, 17-20%, 20-25%, 20-23%, 20-29%, 18-24%, 15-22%.

In the step (7), in 6 passes of the three-fire rolling, the deformation rate distribution of each pass is as follows: 13-28%, 15-25%, 18-25%, 11-23%, 7-19%, 5-14%.

The Ti-Al-Nb-Zr-Mo alloy plate obtained in the step (8) comprises the following components: al: 5.5-6.5 wt.%, Nb: 2.5-3.5 wt.%, Zr: 1.5-2.5 wt.%, Mo: 0.6-1.5 wt.%, and the balance Ti.

The invention has the following advantages and beneficial effects:

the Ti-Al-Nb-Zr-Mo alloy plate obtained by adopting the technical scheme has uniform structure and components, less impurities and high purity, and the cast ingot is directly used for hot rolling without forging in the processing technology, so that the manufacturing process flow of the titanium alloy plate is greatly shortened, and the mechanical property is superior to the level of the existing complex preparation technology. The method has the advantages of simple process and convenient operation, improves the comprehensive yield of the obtained hot rolled plate to about 80 percent, reduces the production cost by 20 to 30 percent, and has obvious market application prospect.

Drawings

FIG. 1 is a process flow diagram of the present invention.

FIG. 2 is a metallographic structure diagram of a plate obtained in example 1 of the present invention.

FIG. 3 is a metallographic structure diagram of a plate obtained in example 2 of the present invention.

FIG. 4 is a metallographic structure diagram of a plate obtained in example 3 of the present invention.

FIG. 5 is a graph of mechanical properties of the sheet obtained in example 1 of the present invention.

FIG. 6 is a mechanical property diagram of the plate obtained in example 2 of the present invention.

FIG. 7 is a graph of mechanical properties of the sheet obtained in example 3 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.

Example 1

A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate comprises the following steps:

(1) the materials are mixed according to the following mass ratio:

aluminum niobium alloy 6.3 wt. -%)

Aluminum bean 4.05 wt. -%)

Zirconium sponge 1.5 wt. -%)

Aluminum molybdenum alloy 1.5 wt. -%)

Titanium sponge 86.65 wt.%;

(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 120 ℃ for 5 hours, and cooling the blocks along with a furnace to obtain pressed blocks;

(3) flatly paving the bulk material in the step (2) in an EB furnace cooling bed provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;

(4) under a vacuum of 1.8X 10^-3When torr is needed, the No. 1 to No. 5 electron guns are started to smelt the bulk mixture in the cooling bed, the voltage of the No. 1 to No. 5 electron guns is controlled to be 29.5KV, the current is controlled to be 3.3A, after 120min of smelting, the electron guns are closed, after 20min of cooling, the briquetting material is pushed into a smelting zone, meanwhile, opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 29.5KV, controlling the current of No. 1 to No. 2 electron guns to be 2.3A, the current of No. 3 to No. 4 electron guns to be 5.3A, the current of No. 5 electron guns to be 3.6A and the current of No. 6 to No. 7 electron guns to be 1.6A, keeping the ingot pulling speed of 8mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 100 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and performing surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy slab ingot;

(5) spraying a proper amount of commercially available lead-free water-based paint on the surface of the alloy slab ingot obtained in the step (4), air-drying, sending into a heating furnace, heating to 950 ℃ at a heating rate of 4 ℃/min, preserving heat for 7h, sending into a two-roller reversible rolling mill, and carrying out rolling for 8 passes on one fire, wherein the deformation rate of each pass is as follows in sequence: 5.0%, 8.9%, 11.6%, 11.8%, 11.1%, 12.5%, 9.5%, 7.4%, and the deformation rate of the rolling process is 56.0%, thus obtaining a one-hot rolled plate with the thickness of 88 mm;

(6) and (3) feeding the first-fire rolled plate obtained in the step (5) into a heating furnace, heating to 940 ℃, preserving heat for 3 hours, feeding the heated first-fire rolled plate into a rolling mill, and carrying out second-fire 7-pass rolling, wherein the deformation rate of each pass is as follows in sequence: 11.4 percent, 17.9 percent, 21.9 percent, 20.0 percent, 18.8 percent and 15.4 percent, and the deformation rate of the rolling process is 75.0 percent, thus obtaining a two-hot rolled plate with the thickness of 22 mm;

(7) feeding the two-fire rolled plate in the step (6) into a heating furnace, heating to 920 ℃, preserving heat for 2 hours, feeding the two-fire rolled plate into a rolling mill, and carrying out three-fire 6-pass rolling, wherein the pass deformation rates are 27.3%, 25.0%, 22.2%, 17.1% and 13.8% in sequence, and the rolling process deformation rate is 77.3%, so as to obtain a three-fire rolled plate with the thickness of 5 mm;

(8) and (3) preserving the heat of the hot rolled plate in the step (7) for 3 hours at 860 ℃ for annealing, cooling to room temperature, and then carrying out coping, acid washing, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate, wherein:

the acid cleaning uses hydrofluoric acid-containing water solution, and the solution ratio is as follows: 18% of HNO₃+12% of Na₂NO₃+3% of HF + the balance water, to prevent the titanium alloy from absorbing hydrogen;

the obtained Ti-Al-Nb-Zr-Mo alloy plate comprises the following components: al: 5.5wt.%, Nb: 2.5 wt.%, Zr: 2.5 wt.%, Mo: 0.6 wt.%, balance Ti;

the mechanical properties are shown in table 1 and fig. 5:

TABLE 1

Sample number	Rm/MPa	Rp0.2/MPa	A/%
				1	885	798	11.9
2	902	789	11.7
				3	891	801	12.3
4	893	794	11.9
				5	900	795	11.3
6	899	803	11.7
				Mean value of	895.0	796.7	11.8

The metallographic structure is shown in FIG. 2.

Example 2

A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate comprises the following steps:

(1) the materials are mixed according to the following mass ratio:

aluminum niobium alloy 5.9 wt. -%)

Aluminum bean 4.45 wt.%

Zirconium sponge 2.0 wt. -%)

Aluminum molybdenum alloy 1.6 wt. -%)

Titanium sponge 86.05 wt.%;

(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100 ℃ for 6 hours, and cooling the blocks along with a furnace to obtain pressed blocks;

(3) flatly paving the bulk material in the step (2) in an EB furnace cooling bed provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;

(4) under a vacuum of 1.8X 10^-3When torr is needed, the No. 1 to No. 5 electron guns are started to smelt the bulk mixture in the cooling bed, the voltage of the No. 1 to No. 5 electron guns is controlled to be 29.5KV, the current is controlled to be 3.3A, after 120min of smelting, the electron guns are closed, after 20min of cooling, the briquetting material is pushed into a smelting zone, meanwhile, opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 29.5KV, controlling the current of No. 1 to No. 2 electron guns to be 2.3A, the current of No. 3 to No. 4 electron guns to be 5.3A, the current of No. 5 electron guns to be 3.6A and the current of No. 6 to No. 7 electron guns to be 1.6A, keeping the ingot pulling speed of 8mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 100 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and performing surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy slab ingot;

(5) spraying a proper amount of commercially available lead-free water-based paint on the surface of the alloy slab ingot obtained in the step (4), air-drying, sending the alloy slab ingot into a heating furnace, heating to 975 ℃ at a heating rate of 5 ℃/min, preserving heat for 6.5 hours, sending the alloy slab ingot into a two-roller reversible rolling mill, and carrying out rolling on 8 passes with one fire, wherein the deformation rate of each pass is as follows in sequence: 5.0%, 7.9%, 11.4%, 11.6%, 10.9%, 12.3%, 9.3%, 8.2%, and the deformation rate of the rolling process is 55.5%, so as to obtain a one-hot rolled plate with the thickness of 89 mm;

(6) and (3) feeding the first-fire rolled plate obtained in the step (5) into a heating furnace, heating to 950 ℃, preserving heat for 2.5 hours, feeding the heated first-fire rolled plate into a rolling mill, and carrying out second-fire 7-pass rolling, wherein the deformation rates of all passes are as follows in sequence: 12.4 percent, 19.2 percent, 20.6 percent, 20.0 percent, 18.8 percent and 15.4 percent, and the deformation rate of the rolling process is 75 percent, thus obtaining a two-hot rolled plate with the thickness of 22 mm;

(7) feeding the two-fire rolled plate in the step (6) into a heating furnace, heating to 925 ℃, preserving heat for 2 hours, feeding the two-fire rolled plate into a rolling mill, and carrying out three-fire 6-pass rolling, wherein the pass deformation rates are 22.7%, 23.5%, 23.1%, 20.0%, 18.8% and 7.7% in sequence, and the rolling process deformation rate is 72.7%, so as to obtain a three-fire rolled plate with the thickness of 6 mm;

(8) and (3) preserving the heat of the hot rolled plate obtained in the step (7) for 2 hours at 880 ℃, annealing, cooling to room temperature, and then carrying out coping, acid pickling, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate, wherein:

the acid cleaning uses hydrofluoric acid-containing water solution, and the solution ratio is as follows: 18% of HNO₃+12% of Na₂NO₃+5% of HF + the balance water, to prevent the titanium alloy from absorbing hydrogen;

the obtained Ti-Al-Nb-Zr-Mo alloy plate comprises the following components: al: 6.2wt.%, Nb: 3.0 wt.%, Zr: 1.98 wt.%, Mo: 1.02 wt.%, balance Ti;

the mechanical properties are shown in table 2 and fig. 6:

TABLE 2

Sample number	Rm/MPa	Rp0.2/MPa	A/%
				1	900	790	12.3
2	895	801	11.8
				3	907	793	11.5
4	909	803	11.9
				5	897	808	12.3
6	892	800	11.7
				Mean value of	900.0	799.2	11.9

The metallographic structure is shown in FIG. 3.

Example 3

A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy hot rolled plate comprises the following steps:

(1) the materials are mixed according to the following mass ratio:

aluminum niobium alloy 5.7 wt. -%)

Aluminum bean 4.77 wt. -%)

Zirconium sponge 2.5 wt. -%)

Aluminum molybdenum alloy 1.7 wt. -%)

Titanium sponge 85.33 wt.%;

(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100 ℃ for 6 hours, and cooling the blocks along with a furnace to obtain pressed blocks;

(3) flatly paving the bulk material in the step (2) in an EB furnace cooling bed provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;

(4) under vacuum degree of 3.5X 10^-3When torr is needed, the No. 1 to No. 5 electron guns are started to melt the bulk mixture in the cooling bed, the voltage of the No. 1 to No. 5 electron guns is controlled to be 30.5KV, the current is controlled to be 4.3A, after 100min of melting, the electron guns are closed, after 40min of cooling, the briquetting material is pushed into a melting zone, meanwhile, opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 30.5KV, controlling the current of No. 1 to No. 2 electron guns to be 3.0A, the current of No. 3 to No. 4 electron guns to be 5.9A, the current of No. 5 electron guns to be 4.6A and the current of No. 6 to No. 7 electron guns to be 2.6A, keeping the ingot pulling speed of 12mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 80 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and performing surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy slab ingot;

(5) spraying a proper amount of commercially available lead-free water-based paint on the surface of the alloy slab ingot obtained in the step (4), air-drying, sending into a heating furnace, heating to 1050 ℃ at a heating rate of 6 ℃/min, preserving heat for 6h, sending into a two-roller reversible rolling mill, and carrying out rolling for 8 passes on one fire, wherein the deformation rate of each pass is as follows in sequence: 6.0 percent, 8.5 percent, 10.5 percent, 13.0 percent, 13.4 percent, 13.8 percent, 10.0 percent and 8.9 percent, and the deformation rate of the rolling process is 59 percent, thus obtaining a hot rolled plate with the thickness of 82 mm;

(6) and (3) feeding the first-fire rolled plate obtained in the step (5) into a heating furnace, heating to 965 ℃, preserving heat for 2h, feeding the heated first-fire rolled plate into a rolling mill, and carrying out second-fire 7-pass rolling, wherein the deformation rate of each pass is as follows in sequence: 11.0 percent, 17.8 percent, 25.0 percent, 22.2 percent, 28.6 percent, 24.0 percent and 21.1 percent, and the deformation rate of the rolling process is 81.7 percent, thereby obtaining a double-hot rolled plate with the thickness of 15 mm;

(7) feeding the two-fire rolled plate in the step (6) into a heating furnace, heating to 930 ℃, preserving heat for 1h, feeding the two-fire rolled plate into a rolling mill, and carrying out three-fire 6-pass rolling, wherein the pass deformation rates are 13.3%, 15.4%, 18.2%, 11.1%, 7.5% and 5.4% in sequence, and the rolling process deformation rate is 53.3%, so as to obtain a three-fire rolled plate with the thickness of 7 mm;

(8) and (3) preserving the heat of the hot rolled plate obtained in the step (7) for 1h at 910 ℃, annealing, cooling to room temperature, and then carrying out coping, acid pickling, straightening and shearing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy plate, wherein:

the acid is washed with hydrofluoric acid-containing water solutionThe ratio is as follows: 25% HNO₃+5% of Na₂NO₃+8% of HF + the balance water, to prevent the titanium alloy from absorbing hydrogen;

the obtained Ti-Al-Nb-Zr-Mo alloy plate comprises the following components: al: 6.13wt.%, Nb: 3.06 wt.%, Zr: 2.00 wt.%, Mo: 0.98 wt.%, balance Ti;

the mechanical properties are shown in table 3 and fig. 7:

TABLE 3

Sample number	Rm/MPa	Rp0.2/MPa	A/%
				1	899	805	12.3
2	903	801	12
				3	900	808	11.9
4	905	810	12.1
				5	908	804	12.5
6	902	800	12.3
				Mean value of	902.8	804.7	12.2

The metallographic structure is shown in FIG. 4.

As can be seen from tables 1, 2 and 3 and FIGS. 5, 6 and 7, the mechanical properties of the parts can meet the requirements through mechanical property detection.

As can be seen from fig. 2, 3 and 4, the metallographic structure was an equiaxed structure.

In conclusion, the mechanical properties obtained in the three examples are all higher than those of the hot rolled plate obtained by casting ingot and rolling after forging through multiple VAR smelting in the prior equipment technology, and R is_m≥880MPa，R_p0.2Not less than 780MPa, A not less than 11 percent, and the technical effects of high efficiency, short flow and low cost are achieved.

The above embodiments are preferred embodiments of the present invention, and are not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made according to the technical spirit of the present invention still belong to the technical field of the present invention.