阅读说明：本技术 一种高强度耐腐蚀铜阀门 (High-strength corrosion-resistant copper valve ) 是由 刘逢 高峰 于 2021-05-25 设计创作，主要内容包括：本发明公开了一种高强度耐腐蚀铜阀门,其阀体的组成成分按重量百分比包括：Al：9.6-10.9％、Fe：2.5-3.3％、Mn：11.3-14.5％、Ni：1.4-2％、Zn：2.3-3.6％、Sr：0.035-0.042％、Ti：0.05-0.067％、B：0.003-0.01％、Gd：0.08-0.15％、Zr：0.1-0.12％、Mo：0.03-0.12％、Nb：0.04-0.15％、Y：0.01-0.05％、La：0.01-0.05％、余量为铜和不可避免的杂质。本发明提出的高强度耐腐蚀铜阀门,其强度高,耐腐蚀性好,耐磨性能优异,使用寿命长。(The invention discloses a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 9.6-10.9%, Fe: 2.5-3.3%, Mn: 11.3-14.5%, Ni: 1.4-2%, Zn: 2.3-3.6%, Sr: 0.035 to 0.042%, Ti: 0.05-0.067%, B: 0.003-0.01%, Gd: 0.08-0.15%, Zr: 0.1-0.12%, Mo: 0.03 to 0.12%, Nb: 0.04-0.15%, Y: 0.01-0.05%, La: 0.01-0.05%, and the balance of copper and inevitable impurities. The high-strength corrosion-resistant copper valve provided by the invention has the advantages of high strength, good corrosion resistance, excellent wear resistance and long service life.)

1. The high-strength corrosion-resistant copper valve is characterized in that the valve body comprises the following components in percentage by weight: al: 9.6-10.9%, Fe: 2.5-3.3%, Mn: 11.3-14.5%, Ni: 1.4-2%, Zn: 2.3-3.6%, Sr: 0.035 to 0.042%, Ti: 0.05-0.067%, B: 0.003-0.01%, Gd: 0.08-0.15%, Zr: 0.1-0.12%, Mo: 0.03 to 0.12%, Nb: 0.04-0.15%, Y: 0.01-0.05%, La: 0.01-0.05%, and the balance of copper and inevitable impurities.

2. The high-strength corrosion-resistant copper valve according to claim 1, wherein the valve body comprises the following components in percentage by weight: al: 9.9%, Fe: 2.8%, Mn: 12.3%, Ni: 1.8%, Zn: 3.2%, Sr: 0.038%, Ti: 0.055%, B: 0.008%, Gd: 0.09%, Zr: 0.105%, Mo: 0.08%, Nb: 0.09%, Y: 0.035%, La: 0.04%, and the balance copper and inevitable impurities.

3. The high-strength corrosion-resistant copper valve according to claim 1, wherein the valve body comprises the following components in percentage by weight: al: 10.1%, Fe: 3%, Mn: 14%, Ni: 1.7%, Zn: 3.1%, Sr: 0.04%, Ti: 0.06%, B: 0.008%, Gd: 0.12%, Zr: 0.108%, Mo: 0.09%, Nb: 0.07%, Y: 0.01%, La: 0.03%, the balance being copper and unavoidable impurities.

4. The high-strength corrosion-resistant copper valve according to any one of claims 1 to 3, wherein the valve body is prepared by a process comprising smelting, casting and heat-treating the cast valve blank; the heat treatment comprises the following steps:

s1, preserving the heat of the valve blank at 870-880 ℃ for 2-4h, cooling the valve blank to room temperature after discharging the valve blank, preserving the heat at 430-450 ℃ for 1-3h, cooling the valve blank to room temperature after discharging the valve blank, preserving the heat at 950-970 ℃ for 10-20min, and cooling the valve blank to room temperature to obtain a primary treatment piece;

s2, preserving the heat of the primary processing piece at the pressure of 2-3GPa and the temperature of 750-800 ℃ for t 1min, then preserving the heat at the pressure of 4-6GPa and the temperature of 850-900 ℃ for t2min, and preserving the pressure and cooling to room temperature to obtain a secondary processing piece; wherein t1+ t2 is 15-25min, and t1 is not less than t 2;

s3, preserving the heat of the secondary treatment piece at 870-880 ℃ for 0.5-1.2h, cooling the secondary treatment piece to room temperature after discharging, preserving the heat at 480-550 ℃ for 0.5-2h, and cooling the secondary treatment piece to room temperature.

5. The high strength corrosion-resistant copper valve according to claim 4, wherein in S1, the water used for water cooling is water having a temperature of 40-55 ℃.

6. The high strength corrosion-resistant copper valve according to claim 4, wherein in S2, t 1-15 min and t 2-5 min.

Technical Field

The invention relates to the technical field of valves, in particular to a high-strength corrosion-resistant copper valve.

Background

The valve is a control part in a pipeline fluid conveying system and has the functions of diversion, cut-off, throttling, non-return, flow division, overflow pressure relief and the like. The valves are very diverse in variety and specification, and can be classified into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum vanadium steel valves, dual-phase steel valves, plastic valves, and the like according to the material quality. The copper alloy valve has excellent corrosion resistance and is fully applied in many fields at present, but the existing copper valve also has the defects of low strength and poor wear resistance, so that the service life of the valve is short, and the application of the valve is limited.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a high-strength corrosion-resistant copper valve which is high in strength, good in corrosion resistance, excellent in wear resistance and long in service life.

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 9.6-10.9%, Fe: 2.5-3.3%, Mn: 11.3-14.5%, Ni: 1.4-2%, Zn: 2.3-3.6%, Sr: 0.035 to 0.042%, Ti: 0.05-0.067%, B: 0.003-0.01%, Gd: 0.08-0.15%, Zr: 0.1-0.12%, Mo: 0.03 to 0.12%, Nb: 0.04-0.15%, Y: 0.01-0.05%, La: 0.01-0.05%, and the balance of copper and inevitable impurities.

Preferably, the valve body comprises the following components in percentage by weight: al: 9.9%, Fe: 2.8%, Mn: 12.3%, Ni: 1.8%, Zn: 3.2%, Sr: 0.038%, Ti: 0.055%, B: 0.008%, Gd: 0.09%, Zr: 0.105%, Mo: 0.08%, Nb: 0.09%, Y: 0.035%, La: 0.04%, and the balance copper and inevitable impurities.

Preferably, the valve body comprises the following components in percentage by weight: al: 10.1%, Fe: 3%, Mn: 14%, Ni: 1.7%, Zn: 3.1%, Sr: 0.04%, Ti: 0.06%, B: 0.008%, Gd: 0.12%, Zr: 0.108%, Mo: 0.09%, Nb: 0.07%, Y: 0.01%, La: 0.03%, the balance being copper and unavoidable impurities.

Preferably, the preparation process of the valve body comprises smelting, pouring and heat treatment of the poured valve blank; the heat treatment comprises the following steps:

s1, preserving the heat of the valve blank at 870-880 ℃ for 2-4h, cooling the valve blank to room temperature after discharging the valve blank, preserving the heat at 430-450 ℃ for 1-3h, cooling the valve blank to room temperature after discharging the valve blank, preserving the heat at 950-970 ℃ for 10-20min, and cooling the valve blank to room temperature to obtain a primary treatment piece;

s2, preserving the heat of the primary processing piece at the pressure of 2-3GPa and the temperature of 750-800 ℃ for t 1min, then preserving the heat at the pressure of 4-6GPa and the temperature of 850-900 ℃ for t2min, and preserving the pressure and cooling to room temperature to obtain a secondary processing piece; wherein t1+ t2 is 15-25min, and t1 is not less than t 2;

s3, preserving the heat of the secondary treatment piece at 870-880 ℃ for 0.5-1.2h, cooling the secondary treatment piece to room temperature after discharging, preserving the heat at 480-550 ℃ for 0.5-2h, and cooling the secondary treatment piece to room temperature.

Preferably, in S1, the water used for water cooling is water with a temperature of 40-55 ℃.

Preferably, in S2, t1 is 15min and t2 is 5 min.

According to the high-strength corrosion-resistant copper valve, specific Al, Fe, Mn, Ni, Zn, Sr, Ti, B, Gd, Zr, Mo, Nb, Y and La are specifically selected to be added into a matrix, the content of each element and a heat treatment process are optimized, and effects of precipitation strengthening, solid solution strengthening, fine grain strengthening and the like are exerted at the same time, so that the obtained valve is high in strength, good in wear resistance, excellent in corrosion resistance and long in service life; specifically, the content of aluminum is properly increased to 9.6-10.9%, Mn is simultaneously 11.3-14.5%, the content of beta single-phase structure in the system is adjusted, the structure is fine and compact, and the alloy strength, toughness and plasticity are excellent; the content of Fe is controlled to be 2.5-3.3%, Y, La and the like are added for multi-alloying, the structure of a matrix is changed, grains are refined, and the wear resistance of the material is improved; ti, B and Sr are jointly added into the alloy to play a synergistic effect, so that the phase composition of the matrix is maintained, and TiB is formed at the same time₂TiAl and other high-melting-point phases play a role in heterogeneous nucleation, refine alloy structure and enable phase distribution to be more uniform, and simultaneously form solid solution and intermetallic compounds with Cu in the cooling process after the alloy is solidified to strengthen the alloy, effectively purify melt, improve the distribution uniformity of elements and improve the hardness, corrosion resistance and friction resistance of the material; mo, Ni and Nb are added into the system according to the content of 0.03-0.12%, 1.4-2% and 0.04-0.15% respectively, have the best synergistic effect, can be dispersed in a matrix, play a role in nucleation and dispersion strengthening, and improve the corrosion resistance and strength of the valve; in the heat treatment process of the valve body, the heat preservation is carried out for three times at different temperatures, so that alloy elements and compounds in the system are separated out as compounds with fine particles and uniform distribution, the mechanical property of the material is improved through the dispersion strengthening effect, and then the heat preservation is carried out for three timesThe heat preservation treatment is carried out twice under high pressure, the heat preservation time is controlled, the defects in the structure are increased, the energy required by crystal nucleus formation is reduced, the crystal grain formation rate is improved, the growth of the crystal grains is inhibited, favorable positions are provided for nucleation of the crystal nuclei in the subsequent treatment process, the heat preservation treatment is carried out twice, the crystal nuclei which are finer and good in appearance are formed, the obtained alloy has few defects, the structure is more compact, and the strength, the wear resistance and the corrosion resistance of the obtained valve body are excellent.

The valve body of the valve is compact in material, small in porosity, high in strength, excellent in wear resistance, good in corrosion resistance and long in service life, and the tensile strength and the yield strength of the valve body respectively reach more than 817MPa and 467 MPa.

The valve body of the valve is subjected to performance detection, the hardness of the valve body reaches more than 229HV, and the elongation after fracture is more than or equal to 16.9 percent; the detection is carried out according to the national standard GB 10124-88 (homogeneous corrosion test method), and the homogeneous corrosion rate of the material in 3.5 percent NaCl solution (the test temperature is 20 ℃) is less than or equal to 0.021 mm/a; on a high-frequency reciprocating friction wear testing machine (the frequency is 20Hz, the load is 1N, the time is 10min, the stroke is 0.8-1 mm, and a friction mating part is Si with the diameter of 4mm₃N₄Ball) and the friction coefficient in 3.5% NaCl solution is less than or equal to 0.02.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to specific examples.

Example 1

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 10.9%, Fe: 2.5%, Mn: 14.5%, Ni: 1.4%, Zn: 2.9%, Sr: 0.035%, Ti: 0.067%, B: 0.003%, Gd: 0.15%, Zr: 0.1%, Mo: 0.09%, Nb: 0.09%, Y: 0.01%, La: 0.05%, and the balance of copper and inevitable impurities.

Example 2

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 9.6%, Fe: 3.3%, Mn: 11.3%, Ni: 1.9%, Zn: 3.6%, Sr: 0.042%, Ti: 0.05%, B: 0.01%, Gd: 0.08%, Zr: 0.12%, Mo: 0.03%, Nb: 0.15%, Y: 0.05%, La: 0.01%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving heat of the valve blank at 880 ℃ for 2h, discharging, cooling with water to room temperature, preserving heat at 450 ℃ for 1h, discharging, cooling with water to room temperature, preserving heat at 970 ℃ for 10min, and cooling with water to room temperature to obtain a primary treatment piece;

s2, preserving heat of the primary processing piece for 8min under the conditions that the pressure is 2GPa and the temperature is 800 ℃, then preserving heat for 7min under the conditions that the pressure is 4GPa and the temperature is 900 ℃, and preserving pressure and cooling to room temperature to obtain a secondary processing piece;

and S3, preserving the heat of the secondary treatment piece at 870 ℃ for 1.2h, taking the secondary treatment piece out of the furnace, cooling the secondary treatment piece to room temperature by water, preserving the heat of the secondary treatment piece at 480 ℃ for 2h, and cooling the secondary treatment piece to room temperature by water.

Example 3

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 10.3%, Fe: 2.7%, Mn: 14.2%, Ni: 2%, Zn: 2.3%, Sr: 0.036%, Ti: 0.06%, B: 0.005%, Gd: 0.13%, Zr: 0.105%, Mo: 0.12%, Nb: 0.04%, Y: 0.02%, La: 0.02% of copper and the balance of inevitable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving heat of the valve blank at 870 ℃ for 4h, discharging, cooling with water to room temperature, preserving heat at 430 ℃ for 3h, discharging, cooling with water to room temperature, preserving heat at 950 ℃ for 20min, and cooling with water to room temperature to obtain a primary treatment piece;

s2, preserving heat of the primary processing piece for 15min under the conditions that the pressure is 3GPa and the temperature is 750 ℃, then preserving heat for 10min under the conditions that the pressure is 6GPa and the temperature is 850 ℃, and preserving pressure and cooling to room temperature to obtain a secondary processing piece;

and S3, preserving the temperature of the secondary treatment piece at 880 ℃ for 0.5h, taking out the secondary treatment piece, cooling the secondary treatment piece to room temperature by water, preserving the heat at 550 ℃ for 0.5h, and cooling the secondary treatment piece to room temperature by water.

Example 4

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 9.9%, Fe: 3.1%, Mn: 11.9%, Ni: 1.6%, Zn: 2.7%, Sr: 0.04%, Ti: 0.055%, B: 0.008%, Gd: 0.1%, Zr: 0.11%, Mo: 0.06%, Nb: 0.11%, Y: 0.03%, La: 0.04%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving heat of the valve blank at 875 ℃ for 2h, discharging, cooling with water to room temperature, preserving heat at 445 ℃ for 1h, discharging, cooling with water to room temperature, preserving heat at 965 ℃ for 13min, and cooling with water to room temperature to obtain a primary treatment piece; wherein the water used for water cooling is water with the temperature of 45 ℃;

s2, preserving heat of the primary processing piece for 10min under the conditions that the pressure is 2GPa and the temperature is 780 ℃, then preserving heat for 8min under the conditions that the pressure is 5GPa and the temperature is 880 ℃, and preserving pressure and cooling to room temperature to obtain a secondary processing piece;

and S3, preserving the temperature of the secondary processing piece at 875 ℃ for 1h, taking the secondary processing piece out of the furnace, cooling the secondary processing piece to room temperature by water, preserving the heat at 480 ℃ for 1.5h, and cooling the secondary processing piece to room temperature by water.

Example 5

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 10.5%, Fe: 3.2%, Mn: 13%, Ni: 1.8%, Zn: 3%, Sr: 0.04%, Ti: 0.062%, B: 0.004%, Gd: 0.13%, Zr: 0.11%, Mo: 0.08%, Nb: 0.11%, Y: 0.035%, La: 0.038%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving the heat of the valve blank at 870 ℃ for 3h, discharging, cooling with water to room temperature, preserving the heat at 435 ℃ for 2h, discharging, cooling with water to room temperature, preserving the heat at 955 ℃ for 18min, and cooling with water to room temperature to obtain a primary treatment piece; wherein the water used for water cooling is water with the temperature of 50 ℃;

s2, preserving heat of the primary processing piece for 12min under the conditions that the pressure is 3GPa and the temperature is 770 ℃, then preserving heat for 10min under the conditions that the pressure is 4GPa and the temperature is 860 ℃, and preserving pressure and cooling to room temperature to obtain a secondary processing piece;

and S3, preserving the temperature of the secondary treatment piece at 880 ℃ for 0.5h, discharging, cooling to room temperature by water, preserving the temperature at 510 ℃ for 0.8h, and cooling to room temperature by water.

Example 6

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 9.9%, Fe: 2.8%, Mn: 12.3%, Ni: 1.8%, Zn: 3.2%, Sr: 0.038%, Ti: 0.055%, B: 0.008%, Gd: 0.09%, Zr: 0.105%, Mo: 0.08%, Nb: 0.09%, Y: 0.035%, La: 0.04%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving heat of the valve blank at 878 ℃ for 2.5h, discharging, cooling to room temperature with water, preserving heat at 438 ℃ for 2.5h, discharging, cooling to room temperature with water, preserving heat at 959 ℃ for 17min, and cooling to room temperature with water to obtain a primary treatment piece; wherein the water used for water cooling is water with the temperature of 42 ℃;

s2, preserving the heat of the primary processing piece for 12min under the conditions that the pressure is 2GPa and the temperature is 790 ℃, then preserving the heat for 11min under the conditions that the pressure is 4GPa and the temperature is 898 ℃, and preserving the pressure and cooling to room temperature to obtain a secondary processing piece;

s3, preserving the temperature of the secondary treatment piece at 872 ℃ for 1h, taking the secondary treatment piece out of the furnace, cooling the secondary treatment piece to room temperature by water, preserving the heat at 488 ℃ for 1.6h, and cooling the secondary treatment piece to room temperature by water.

Example 7

The invention provides a high-strength corrosion-resistant copper valve, which comprises the following components in percentage by weight: al: 10.1%, Fe: 3%, Mn: 14%, Ni: 1.7%, Zn: 3.1%, Sr: 0.04%, Ti: 0.06%, B: 0.008%, Gd: 0.12%, Zr: 0.108%, Mo: 0.09%, Nb: 0.07%, Y: 0.01%, La: 0.03%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises smelting, pouring and heat treatment of a poured valve blank; the heat treatment comprises the following steps:

s1, preserving heat of the valve blank at 873 ℃ for 3h, discharging, cooling with water to room temperature, preserving heat at 444 ℃ for 1.6h, discharging, cooling with water to room temperature, preserving heat at 963 ℃ for 12min, and cooling with water to room temperature to obtain a primary treatment piece; wherein the water used for water cooling is water with the temperature of 51 ℃;

s2, preserving heat of the primary processing piece for 15min under the conditions that the pressure is 3GPa and the temperature is 770 ℃, then preserving heat for 5min under the conditions that the pressure is 5GPa and the temperature is 865 ℃, and preserving pressure and cooling to room temperature to obtain a secondary processing piece;

and S3, preserving the heat of the secondary treatment piece for 0.7h at 878 ℃, cooling the secondary treatment piece to room temperature by water after discharging, preserving the heat for 0.9h at 533 ℃, and cooling the secondary treatment piece to room temperature by water.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.