阅读说明：本技术 一种高温合金棒丝材的制备方法 (Preparation method of high-temperature alloy rod wire ) 是由 万柏方 束文武 石建军 刘春梅 韦桂 郑�硕 于 2020-12-18 设计创作，主要内容包括：本发明涉及一种高温合金棒丝材的制备工艺方法,主要针对制备高温合金GH4169棒丝材进行展开。该制备方法包括真空感应熔炼制坯、上引连续铸造、表面处理、热轧、盐浴处理及酸洗、固溶处理、冷拉拔、中间退火、时效处理等工序。由于合金材料的塑性性能、加工手段有限,冷拉拔工艺需要进行多道次进行。该发明制得的GH4169棒丝材组织均匀、强度高、疲劳强度优良,适用于以各类高温合金棒丝材作为原材料加工的多项工程领域。(The invention relates to a preparation process method of a high-temperature alloy rod wire, which is mainly used for preparing a high-temperature alloy GH4169 rod wire. The preparation method comprises the working procedures of vacuum induction smelting blank making, upward continuous casting, surface treatment, hot rolling, salt bath treatment, acid washing, solid solution treatment, cold drawing, intermediate annealing, aging treatment and the like. Because the plastic property and the processing means of the alloy material are limited, the cold drawing process needs to be carried out for multiple times. The GH4169 rod wire material prepared by the method has the advantages of uniform structure, high strength and excellent fatigue strength, and is suitable for multiple engineering fields of processing by taking various high-temperature alloy rod wire materials as raw materials.)

1. The preparation method of the high-temperature alloy rod wire is characterized by comprising the following steps

A. Vacuum induction melting: preparing a high-temperature alloy blank by adopting a method of multiple vacuum induction melting, wherein the chemical component (mass fraction percent) of GH4169 is C0.04; cr 18.09; fe 17.69; nb + Ta 5.43; mo 3.07; 0.46 of Al; 0.97 of Ti; si 0.078; mn 0.065; 0.18 of Co; 0.065 of Cu; the balance of Ni; preparing a high-temperature alloy blank by using the components;

B. upward continuous casting: heating the high-temperature alloy blank to 1260-1320 ℃ in a heating furnace, and then carrying out up-drawing continuous casting to prepare an alloy rod with the diameter of 12 mm;

C. surface treatment: removing a surface oxide layer with the thickness of 1mm and defects by adopting a coreless lathe to remove the skin to obtain a bright blank without obvious defects, and cleaning the surface by using alkali liquor to keep the surface clean;

D. hot rolling: heating the mixture to 1000-1120 ℃ in a heating furnace, carrying out hot rolling, hot rolling into a rod wire material with the diameter of 6mm, and water quenching to normal temperature;

E. salt bath treatment and acid washing: performing salt bath pretreatment on the rod wire material, and then performing acid pickling by using mixed acid of nitric acid and hydrofluoric acid;

solution treatment: preserving heat for 1h at 950-980 ℃ in a heating furnace before cold processing, and quickly cooling by water after discharging;

cold drawing: adopting a cold drawing process to gradually thin the high-temperature alloy rods and wires until the diameter is less than or equal to 3 mm;

G. intermediate annealing: carrying out annealing heat treatment in the middle of two times of cold drawing at 960-980 ℃ for 50min to eliminate internal stress;

H. aging treatment: and heating the high-temperature alloy wire subjected to cold drawing treatment to 1030-1050 ℃, preserving heat, performing aging treatment, straightening the rod wire after the aging treatment is finished, and finishing the preparation.

2. The method of claim 1, wherein the preparation of the billet comprises selection and preparation of a crucible, charge preparation, melting and refining, and casting to obtain the superalloy billet.

3. The method according to claim 2, wherein the furnace gas is neutral or weakly alkaline in order to provide precise temperature control capability, thereby preventing unstable chemical properties due to fluctuations in oxidizing and reducing properties of the furnace gas components.

4. The process according to claim 2 or 3, wherein the cold drawing in step F is carried out in a plurality of passes, each pass having an elongation coefficient of 1.3 or less;

the elongation coefficient of the first pass is 1.25, and a high-temperature alloy wire with the diameter of 4.8mm is obtained; the elongation coefficient of the second pass is 1.26, and the diameter is changed to 3.8 mm; the elongation coefficient of the third pass is 1.27, and the high-temperature alloy rod wire with the diameter of 3mm is obtained; finally, cold drawing with the elongation coefficient less than or equal to 1.4 is carried out, and a finished product with the diameter less than or equal to 3mm is finally obtained.

5. The method of claim 4, wherein the intermediate thickness is annealed at each cold drawing so as to eliminate work hardening after cold deformation.

6. A method as claimed in claim 5, wherein the strength and hardness of the rod wire are enhanced by aging treatment after the final high temperature alloy rod wire is obtained.

Technical Field

The invention relates to the technical field of high-temperature alloy manufacturing, in particular to a preparation process method of high-temperature alloy rods and wires.

Background

The high-temperature alloy is a metal material which takes iron, nickel and cobalt as the base and can work for a long time at a high temperature of more than 600 ℃ under the action of certain stress. GH4169 is a precipitation-strengthened nickel-based high-temperature alloy, has good comprehensive performance within the temperature range of-253-650 ℃, and has good fatigue resistance, oxidation resistance, corrosion resistance, processability and welding performance. Can be used for manufacturing various components with complex structures, and has wide application in the fields of aerospace, nuclear energy engineering and petrochemical industry.

The GH4169 high-temperature alloy rod wire is mainly used for manufacturing various rotating parts and static parts in the field of aerospace engines, various elastic elements and frames in nuclear engineering and various members needing to be stable in extreme environments such as high temperature and the like. Manufacturing various stationary and rotating parts in aeronautical and aerospace engines, such as disks, rings, casings, shafts, blades, fasteners, elastic elements, gas ducts, sealing elements, etc. and welded structures; manufacturing various elastic elements and grids for industrial applications of nuclear energy; for the manufacture of parts and other parts for applications in the field of petro-and chemical engineering. The production and manufacturing process requirements for the GH4169 high-temperature alloy are high, so that a preparation process method which can be suitable for efficiently and stably producing high-temperature alloy rods and wires is found, and the problem which needs to be solved urgently in the field of high-temperature alloys is solved.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a preparation process of high-temperature alloy rod wires, which has high production efficiency and simple steps.

The high-temperature alloy bar is a common high-temperature alloy part, the bar is required to be subjected to cold drawing frequently in the production and processing process of the high-temperature alloy bar, cold drawing is a processing technology of the material, and for a metal material, cold drawing refers to drawing under the condition that the material is at normal temperature in order to achieve a certain shape and certain mechanical properties. The cold drawn product has the advantages of good surface finish and accurate size when being hot formed.

In order to achieve the technical purpose and achieve the technical effect, the invention provides a preparation method of a high-temperature alloy rod wire, which comprises the following steps:

A. vacuum induction melting: preparing a high-temperature alloy blank by adopting a method of multiple vacuum induction melting;

B. upward continuous casting: heating the high-temperature alloy blank to 1260-1320 ℃ in a heating furnace, and then carrying out up-drawing continuous casting to prepare an alloy rod with the diameter of 12 mm;

C. surface treatment: removing a surface oxide layer with the thickness of 1mm and defects by adopting a coreless lathe to remove the skin to obtain a bright blank without obvious defects, and cleaning the surface by using alkali liquor to keep the surface clean;

D. hot rolling: heating the mixture to 1000-1120 ℃ in a heating furnace, carrying out hot rolling, hot rolling into a rod wire material with the diameter of 6mm, and water quenching to normal temperature;

E. salt bath treatment and acid washing: performing salt bath pretreatment on the rod wire material, and then performing acid pickling by using mixed acid of nitric acid and hydrofluoric acid;

E. solution treatment: preserving heat for 1h at 950-980 ℃ in a heating furnace before cold processing, and quickly cooling by water after discharging;

F. cold drawing: adopting a cold drawing process to gradually thin the high-temperature alloy rods and wires until the diameter is less than or equal to 2 mm;

G. intermediate annealing: carrying out annealing heat treatment in the middle of two times of cold drawing at 960-980 ℃ for 50 min;

H. aging treatment: and (4) carrying out aging treatment on the high-temperature alloy wire subjected to cold drawing treatment.

Further, in the step A, the crucible used for vacuum melting is made of refractory materials based on alumina and magnesia, the vacuum degree in the refining period should reach the actual highest value of an air extraction device, and is usually between 1.33 and 0.13N/m, so that the advantages of vacuum melting are ensured.

Further, in the step F, the elongation coefficient of the first cold drawing is controlled to be 1.25, and the high-temperature alloy wire with the diameter of 4.8mm is obtained; the elongation coefficient of the second pass is controlled to be 1.26, and the diameter is changed to be 3.8 mm; the elongation coefficient of the third pass is 1.27, and the high-temperature alloy rod wire with the diameter of 3mm is obtained; finally, cold drawing with the elongation coefficient less than or equal to 1.4 is carried out, and a finished product with the diameter less than or equal to 3mm is finally obtained;

furthermore, in the step G, annealing treatment is carried out in the middle of two times of cold drawing, so that the work hardening effect caused by cold deformation is eliminated.

Further, in the step H, after the final cold deformation is finished, the high-temperature alloy rod and wire materials are subjected to aging treatment, so that the strength and the hardness of the materials are enhanced, and the service performance of the materials is improved.

Has the advantages that:

1. the invention provides a feasible and effective method for preparing the high-temperature alloy rod wire;

2. the high-temperature alloy rod wire prepared by the method has high strength and hardness, excellent service performance and high engineering application value.

3. The method forms a complete preparation system from the preparation of the blank to the final forming of the rod and wire materials, and is scientific and reliable.

Drawings

FIG. 1 is a flow chart of the preparation of superalloy rod wire.

Detailed Description

The following describes the preparation method of GH4169 alloy rod wire in detail through specific implementation examples.

Example 1

The preparation method of the high-temperature alloy rod wire material comprises the following specific steps:

A. vacuum induction melting: and preparing a high-temperature alloy blank by adopting a method of vacuum induction melting for many times.

B. Upward continuous casting: heating the high-temperature alloy blank to 1280 ℃ in a heating furnace, and then carrying out up-drawing continuous casting to prepare an alloy rod with the diameter of 12 mm; the hardness of the bar and the wire is tested, and the hardness of the GH4169 high-temperature alloy is measured to be

C. Surface treatment: removing a surface oxide layer and defects with the thickness of 1mm by adopting a coreless lathe, and cleaning the surface by using alkali liquor;

D. hot rolling: heating to 1050 ℃ in a heating furnace, carrying out hot rolling, hot rolling into a rod wire material with the diameter of 6mm, and water quenching to normal temperature;

E. salt bath treatment and acid washing: the method comprises the steps of pretreating the rod and wire materials in a salt bath mode, and then carrying out acid cleaning by using mixed acid of nitric acid and hydrofluoric acid, wherein the concentration of the nitric acid is 210g/L, and the concentration of the hydrofluoric acid is 25 g/L.

E. Solution treatment: preserving heat for 1h at 960 ℃ in a heating furnace before cold processing, and quickly cooling by water after discharging;

F. cold drawing: adopting a cold drawing process, and controlling the elongation coefficient of the first cold drawing to be 1.25 to obtain a high-temperature alloy wire with the diameter of 4.8 mm; the elongation coefficient of the second pass is controlled to be 1.26, and the diameter is changed to be 3.8 mm; the elongation coefficient of the third pass is 1.27, and the high-temperature alloy rod wire with the diameter of 3mm is obtained; finally, cold drawing with the elongation coefficient less than or equal to 1.4 is carried out, and a finished product with the diameter less than or equal to 3mm is finally obtained;

G. intermediate annealing: performing annealing heat treatment at 970 ℃ for 50min in the middle of every two cold drawing processes;

H. aging treatment: and heating the high-temperature alloy wire subjected to cold drawing treatment to 1050 ℃ for aging treatment to obtain the high-temperature alloy wire with the diameter of 2.8 mm.

The Brinell hardness of the conventional solid solution strengthened GH4169 superalloy is 363HBS, the tensile strength is 965MPa and the yield strength is 550MPa, the hardness test is carried out on the high-temperature alloy rod wire prepared in the embodiment, the distributed hardness of the GH4169 superalloy is 375HBS, and the strength test is carried out, the tensile strength of GH4169 is 1025MPa and the yield strength is 580 MPa.

Example 2

A. Vacuum induction melting: preparing a high-temperature alloy blank by adopting a method of multiple vacuum induction melting;

B. upward continuous casting: heating the high-temperature alloy blank to 1300 ℃ in a heating furnace, and then carrying out up-drawing continuous casting to prepare an alloy rod with the diameter of 12 mm;

C. surface treatment: removing a surface oxide layer and defects with the thickness of 1mm by adopting a coreless lathe, and cleaning the surface by using alkali liquor;

D. hot rolling: heating to 1060 ℃ in a heating furnace, carrying out hot rolling, hot rolling into a rod wire material with the diameter of 6mm, and water quenching to normal temperature;

E. salt bath treatment and acid washing: the method comprises the steps of pretreating the rod and wire materials in a salt bath mode, and then carrying out acid cleaning by using mixed acid of nitric acid and hydrofluoric acid, wherein the concentration of the nitric acid is 200g/L, and the concentration of the hydrofluoric acid is 20 g/L.

E. Solution treatment: preserving heat for 1h at 950 ℃ in a heating furnace before cold processing, and quickly cooling by water after discharging;

F. cold drawing: adopting a cold drawing process, and controlling the elongation coefficient of the first cold drawing to be 1.22 to obtain a high-temperature alloy wire with the diameter of 4.9 mm; the elongation coefficient of the second pass is controlled to be 1.22, and the diameter is changed to be 4.0 mm; the elongation coefficient of the third pass is 1.33, and the high-temperature alloy rod wire with the diameter of 3mm is obtained; finally, cold drawing with the elongation coefficient less than or equal to 1.4 is carried out, and a finished product with the diameter less than or equal to 3mm is finally obtained;

G. intermediate annealing: performing annealing heat treatment at 960 deg.C for 50min between every two cold drawing steps;

H. aging treatment: and heating the high-temperature alloy wire subjected to cold drawing treatment to 1030 ℃ for aging treatment to obtain the high-temperature alloy wire with the diameter of 2.6 mm.

The Brinell hardness of the conventional solid solution strengthened GH4169 superalloy is 363HBS, the tensile strength is 965MPa and the yield strength is 550MPa, the hardness test is carried out on the superalloy rod wire prepared in the embodiment, the distributed hardness of the GH4169 superalloy is 381HBS, and the strength test is carried out, the tensile strength of the GH4169 is 1040MPa and the yield strength is 590 MPa.

Example 3

A. Vacuum induction melting: preparing a high-temperature alloy blank by adopting a method of multiple vacuum induction melting;

B. upward continuous casting: heating the high-temperature alloy blank to 1270 ℃ in a heating furnace, and then carrying out up-drawing continuous casting to prepare an alloy rod with the diameter of 12 mm;

C. surface treatment: removing a surface oxide layer and defects with the thickness of 1mm by adopting a coreless lathe, and cleaning the surface by using alkali liquor;

D. hot rolling: heating to 1050 ℃ in a heating furnace, carrying out hot rolling, hot rolling into a rod wire material with the diameter of 6mm, and water quenching to normal temperature;

E. salt bath treatment and acid washing: the method comprises the steps of pretreating the rod and wire materials in a salt bath mode, and then carrying out acid cleaning by using mixed acid of nitric acid and hydrofluoric acid, wherein the concentration of the nitric acid is 210g/L, and the concentration of the hydrofluoric acid is 25 g/L.

E. Solution treatment: preserving heat for 1h at 960 ℃ in a heating furnace before cold processing, and quickly cooling by water after discharging;

F. cold drawing: adopting a cold drawing process, and controlling the elongation coefficient of the first cold drawing to be 1.27 to obtain a high-temperature alloy wire with the diameter of 4.7 mm; the elongation coefficient of the second pass is controlled to be 1.23, and the diameter is changed to be 3.8 mm; the elongation coefficient of the third pass is 1.27, and the high-temperature alloy rod wire with the diameter of 3mm is obtained; finally, cold drawing with the elongation coefficient less than or equal to 1.4 is carried out, and a finished product with the diameter less than or equal to 3mm is finally obtained;

G. intermediate annealing: performing annealing heat treatment at 980 ℃ for 50min in the middle of each two cold drawing steps;

H. aging treatment: and heating the high-temperature alloy wire subjected to cold drawing treatment to 1010 ℃ for aging treatment to obtain the high-temperature alloy wire with the diameter of 2.4 mm.

The prepared high-temperature alloy rod wire is subjected to hardness test, the distributed hardness of the GH4169 high-temperature alloy is 382HBS, and the strength test is also carried out, wherein the tensile strength of the GH4169 is 1010MPa, and the yield strength is 570 MPa.

The Brinell hardness of the conventional solid solution strengthened GH4169 high-temperature alloy is 363HBS, the tensile strength is 965MPa, and the yield strength is 550MPa, and the strength and hardness of the GH4169 high-temperature alloy prepared by the method of the embodiment are more excellent than the performance of the conventional GH4169 high-temperature alloy.

The above examples are merely illustrative of the technical ideas and features of the present invention, and those skilled in the art can modify or change the above examples according to the above description. All equivalent changes and modifications made according to the spirit of the present invention should fall within the scope of the appended claims.