阅读说明：本技术 一种使用寿命长的铜阀门 (Copper valve with long service life ) 是由 刘逢 高峰 于 2021-05-25 设计创作，主要内容包括：本发明公开了一种使用寿命长的铜阀门,其阀体的组成成分按重量百分比包括：Al：5.5-6.8％、Fe：1.2-2.5％、Mn：6.5-10.2％、Ni：1.4-2.6％、Zn：0.48-0.97％、Sn：1.1-2.5％、Cr：0.02-0.045％、Co：0.05-0.11％、Sr：0.01-0.03％、Ti：0.02-0.05％、B：0.01-0.015％、Bi：0.16-0.37％、Se：0.12-0.26％、Zr：0.01-0.05％、Mo：0.03-0.12％、Nb：0.04-0.11％、余量为铜和不可避免的杂质。本发明提出的铜阀门,其强度高,耐腐蚀性好,耐磨性能优异,使用寿命长。(The invention discloses a copper valve with long service life, which comprises the following components in percentage by weight: al: 5.5-6.8%, Fe: 1.2-2.5%, Mn: 6.5-10.2%, Ni: 1.4-2.6%, Zn: 0.48 to 0.97%, Sn: 1.1-2.5%, Cr: 0.02 to 0.045%, Co: 0.05-0.11%, Sr: 0.01-0.03%, Ti: 0.02-0.05%, B: 0.01-0.015%, Bi: 0.16-0.37%, Se: 0.12 to 0.26%, Zr: 0.01-0.05%, Mo: 0.03 to 0.12%, Nb: 0.04-0.11%, and the balance of copper and inevitable impurities. The copper valve provided by the invention has the advantages of high strength, good corrosion resistance, excellent wear resistance and long service life.)

1. The copper valve with long service life is characterized in that the valve body comprises the following components in percentage by weight: al: 5.5-6.8%, Fe: 1.2-2.5%, Mn: 6.5-10.2%, Ni: 1.4-2.6%, Zn: 0.48 to 0.97%, Sn: 1.1-2.5%, Cr: 0.02 to 0.045%, Co: 0.05-0.11%, Sr: 0.01-0.03%, Ti: 0.02-0.05%, B: 0.01-0.015%, Bi: 0.16-0.37%, Se: 0.12 to 0.26%, Zr: 0.01-0.05%, Mo: 0.03 to 0.12%, Nb: 0.04-0.11%, and the balance of copper and inevitable impurities.

2. The copper valve according to claim 1, characterized in that the weight percentages of Cr, Co, Sr, Ti, B, Bi, Se, Zr, Mo, Nb in the components of the valve body satisfy the following relations: cr + Co + Sr + Ti + B + Bi + Se + Zr + Mo + Nb of not more than 0.62% and not more than 0.96%.

3. The copper valve with long service life according to claim 1, characterized in that the weight percentages of Cr, Co, Zr, Mo and Nb in the components of the valve body satisfy the following relational expression: 4 multiplied by Cr plus Co plus Zr-0.025 percent and less than or equal to Mo plus Nb.

4. The copper valve with long service life according to claim 1, wherein the valve body comprises the following components in percentage by weight: al: 6.4%, Fe: 1.9%, Mn: 9.3%, Ni: 1.7%, Zn: 0.83%, Sn: 1.9%, Cr: 0.03%, Co: 0.07%, Sr: 0.02%, Ti: 0.029%, B: 0.012%, Bi: 0.21%, Se: 0.13%, Zr: 0.018%, Mo: 0.09%, Nb: 0.11%, and the balance copper and inevitable impurities.

5. The copper valve with long service life according to any one of claims 1-4, characterized in that the preparation process of the valve body comprises the following heat treatment steps: the workpiece to be processed is heat-preserved for 1-2h at the temperature of 930-945 ℃, cooled to room temperature by water, and then heat-preserved for t at the temperature of 280-320 DEG₁min, and then keeping the temperature t at 430-₂min, and then keeping the temperature t at 550 DEG C₃min, wherein, t₁、t₂、t₃All are 60-120.

6. Copper valve according to claim 5, characterized in that t is the length of time t₁+t₂+t₃＝250-300。

7. Copper valve according to claim 6, characterized in that t is the length of time t₁＞t₂And t is₂＜t₃。

Technical Field

The invention relates to the technical field of valves, in particular to a copper valve with long service life.

Background

The valve is a device used for controlling the direction, pressure and flow of fluid in a fluid system, and has the functions of diversion, cut-off, throttling, check, diversion, overflow, pressure relief and the like. Copper valve is with valve of copper casting promptly, it is one kind of valve, belongs to industrial part, including copper gate valve, copper ball valve, copper stop valve etc. and has obtained abundant application in many fields at present, but current copper valve also has the defect that intensity is low, wearability is not good enough, leads to the life of valve shorter, has restricted its application.

Disclosure of Invention

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

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 5.5-6.8%, Fe: 1.2-2.5%, Mn: 6.5-10.2%, Ni: 1.4-2.6%, Zn: 0.48 to 0.97%, Sn: 1.1-2.5%, Cr: 0.02 to 0.045%, Co: 0.05-0.11%, Sr: 0.01-0.03%, Ti: 0.02-0.05%, B: 0.01-0.015%, Bi: 0.16-0.37%, Se: 0.12 to 0.26%, Zr: 0.01-0.05%, Mo: 0.03 to 0.12%, Nb: 0.04-0.11%, and the balance of copper and inevitable impurities.

Preferably, in the composition of the valve body, the weight percentages of Cr, Co, Sr, Ti, B, Bi, Se, Zr, Mo and Nb satisfy the following relational expression: 0.62 percent to less than or equal to

Cr+Co+Sr+Ti+B+Bi+Se+Zr+Mo+Nb≤0.96％。

Preferably, in the composition of the valve body, the weight percentages of Cr, Co, Zr, Mo and Nb satisfy the following relational expression: 4 multiplied by Cr plus Co plus Zr-0.025 percent and less than or equal to Mo plus Nb.

Preferably, the valve body comprises the following components in percentage by weight: al: 6.4%, Fe: 1.9%, Mn: 9.3%, Ni: 1.7%, Zn: 0.83%, Sn: 1.9%, Cr: 0.03%, Co: 0.07%, Sr: 0.02%, Ti: 0.029%, B: 0.012%, Bi: 0.21%, Se: 0.13%, Zr: 0.018%, Mo: 0.09%, Nb: 0.11%, and the balance copper and inevitable impurities.

Preferably, the preparation process of the valve body comprises the following heat treatment steps: the workpiece to be processed is heat-preserved for 1-2h at the temperature of 930-945 ℃, cooled to room temperature by water, and then heat-preserved for t at the temperature of 280-320 DEG₁min, and then keeping the temperature t at 430-₂min, and then keeping the temperature t at 550 DEG C₃min, wherein, t₁、t₂、t₃All are 60-120.

Preferably, t is₁+t₂+t₃＝250-300。

Preferably, t is₁＞t₂And t is₂＜t₃。

The copper valve with long service life is characterized in that specific Al, Fe, Mn, Ni, Zn, Sn, Cr, Co, Sr, Ti, B, Bi, Se, Zr, Mo and Nb are 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, the tensile strength is more than 755MPa, the yield strength is more than 538MPa, the hardness HB is 400-minus-one, the abrasion resistance is good, and the service life is long; specifically, the weight percentages of Cr, Co, Sr, Ti, B, Bi, Se, Zr, Mo and Nb are controlled to satisfy the relation that Cr + Co + Sr + Ti + B + Bi + Se + Zr + Mo + Nb is more than or equal to 0.62% and less than or equal to 0.96%, and satisfy the relation that 4 x Cr + Co + Zr-0.025% and more than or equal to Mo + Nb, so that the synergistic effect is exerted, crystal grains are refined, the excellent strength of the valve is ensured, the corrosion resistance of the valve is not reduced, and the overheating sensitivity and brittleness of the obtained valve can be reduced while the excellent mechanical property and corrosion resistance are achieved; in the heat treatment process, heat preservation is carried out for four times at different temperatures, the heat preservation time and temperature are controlled, the alloy structure is stabilized, the residual stress is effectively reduced, the precipitation strengthening and dispersion strengthening effects are more obvious, the obtained valve obtains a uniform and fine structure, and the valve has higher strength, hardness and wear resistance.

The valve body in the invention is detected according to the national standard GB 10124-88 (uniform corrosion test method), and the uniform corrosion rate of the valve body in 3.5% NaCl (test temperature is 20 ℃) solution is less than or equal to 0.02201 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 0.021.

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 copper valve with long service life, which comprises the following components in percentage by weight: al: 6.8%, Fe: 1.2%, Mn: 10.2%, Ni: 1.4%, Zn: 0.9%, Sn: 2%, Cr: 0.02%, Co: 0.05%, Sr: 0.03%, Ti: 0.02%, B: 0.015%, Bi: 0.19%, Se: 0.26%, Zr: 0.01%, Mo: 0.12%, Nb: 0.04%, and the balance copper and inevitable impurities.

Example 2

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 5.5%, Fe: 2.5%, Mn: 6.5%, Ni: 2.6%, Zn: 0.48%, Sn: 1.1%, Cr: 0.045%, Co: 0.05%, Sr: 0.01%, Ti: 0.05%, B: 0.01%, Bi: 0.3%, Se: 0.12%, Zr: 0.03%, Mo: 0.03%, Nb: 0.11%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: and (3) preserving the temperature of the workpiece to be processed for 1h at 945 ℃, cooling the workpiece to room temperature by water, preserving the temperature for 120min at 320 ℃, preserving the temperature for 60min at 430 ℃, and preserving the temperature for 120min at 550 ℃.

Example 3

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 5.7%, Fe: 2.1%, Mn: 6.9%, Ni: 2.2%, Zn: 0.97%, Sn: 2.5%, Cr: 0.021%, Co: 0.11%, Sr: 0.018%, Ti: 0.04%, B: 0.012%, Bi: 0.16%, Se: 0.22%, Zr: 0.05%, Mo: 0.12%, Nb: 0.1%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: keeping the temperature of the workpiece to be processed at 930 ℃ for 2h, cooling to room temperature with water, keeping the temperature at 280 ℃ for 60min, keeping the temperature at 460 ℃ for 120min, and keeping the temperature at 500 ℃ for 60 min.

Example 4

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 6.2%, Fe: 1.4%, Mn: 9.8%, Ni: 1.7%, Zn: 0.55%, Sn: 1.4%, Cr: 0.03%, Co: 0.07%, Sr: 0.02%, Ti: 0.025%, B: 0.014%, Bi: 0.37%, Se: 0.15%, Zr: 0.03%, Mo: 0.09%, Nb: 0.11%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: keeping the temperature of the workpiece to be processed at 938 ℃ for 2h, cooling to room temperature with water, keeping the temperature at 290 ℃ for 120min, keeping the temperature at 455 ℃ for 60min, and keeping the temperature at 535 ℃ for 70 min.

Example 5

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 5.8%, Fe: 2.3%, Mn: 8.5%, Ni: 1.9%, Zn: 0.58%, Sn: 2.1%, Cr: 0.02%, Co: 0.06%, Sr: 0.015%, Ti: 0.04%, B: 0.01%, Bi: 0.18%, Se: 0.12%, Zr: 0.01%, Mo: 0.07%, Nb: 0.095%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: and (3) keeping the temperature of the workpiece to be processed at 942 ℃ for 1h, cooling the workpiece to room temperature by water, keeping the temperature at 310 ℃ for 110min, keeping the temperature at 438 ℃ for 90min, and keeping the temperature at 510 ℃ for 100 min.

Example 6

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 6.5%, Fe: 1.8%, Mn: 9.6%, Ni: 2.3%, Zn: 0.8%, Sn: 1.6%, Cr: 0.03%, Co: 0.07%, Sr: 0.03%, Ti: 0.03%, B: 0.015%, Bi: 0.265%, Se: 0.24%, Zr: 0.05%, Mo: 0.12%, Nb: 0.11%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: keeping the temperature of the workpiece to be processed at 940 ℃ for 1.5h, cooling the workpiece to room temperature with water, keeping the temperature at 300 ℃ for 110min, keeping the temperature at 440 ℃ for 80min, and keeping the temperature at 520 ℃ for 90 min.

Example 7

The invention provides a copper valve with long service life, which comprises the following components in percentage by weight: al: 6.4%, Fe: 1.9%, Mn: 9.3%, Ni: 1.7%, Zn: 0.83%, Sn: 1.9%, Cr: 0.03%, Co: 0.07%, Sr: 0.02%, Ti: 0.029%, B: 0.012%, Bi: 0.21%, Se: 0.13%, Zr: 0.018%, Mo: 0.09%, Nb: 0.11%, the balance being copper and unavoidable impurities;

the preparation process of the valve body comprises the following heat treatment steps: and (3) insulating the workpiece to be processed at 935 ℃ for 1h, cooling to room temperature with water, then insulating at 290 ℃ for 100min, then insulating at 450 ℃ for 92min, and then insulating at 500-550 ℃ for 98 min.

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.