A kind of method preparing copper alloy valve pipe fitting
Technical field
The present invention relates to a kind of method preparing copper alloy valve pipe fitting, belong to acid bronze alloy and manufacture field.
Background technology
Monel is owing to having good mechanical performance, wearability, corrosion resistance etc., thus obtain in valve pipe fitting manufacture field and use widely, but in view of the hot-working character that monel is poor, the forming mode of monel bar is casting mainly, but it is many to there is internal flaw in the monel of casting, compactness is poor, and the problems such as seepage easily occurs in life-time service, and this makes the casting reliability of monel, yield rate, service life, stock utilization etc. all be restricted;And prior art prepare monel need to through pressure processing repeatedly, homogenizing annealing, and its processing technique is complicated, causes existing monel relatively costly.
Summary of the invention
It is an object of the invention to provide a kind of solve that prior art cast monel valve pipe fitting internal flaw is many, the poor problem of compactness, Simplified flowsheet, raising production efficiency, the production technology making monel valve pipe fitting of production cost of reducing.
The invention discloses a kind of method that investment casting prepares monel valve pipe fitting for achieving the above object, it is characterized in that, the percentage by weight of alloy composition is: Ni8.6%, Co1.6%, Zn5.6%, Cr0.056%, Sb0.36%, V0.036%, Fe0.036%, Nb0.016%, Mn0.016%, Ce0.056%, Mo0.036%, surplus is copper and inevitable nonmetal inclusion
The preparation method of institute's monel valve pipe fitting, comprise the following steps: require to carry out dispensing according to above-mentioned monel chemical composition, it is initially charged fine copper ingot, after fine copper ingot melts, adds nickel zinc alloy, then add cobalt, it is eventually adding containing other alloying elements, smelting temperature is 1380 DEG C, cast: cast temperature is 1360 DEG C, after carry out the demoulding, the monel valve pipe fitting obtained is incubated 120 minutes at 860 DEG C, then carries out Quenching Treatment in this temperature;Cooldown rate is more than 30 DEG C/sec;Afterwards copper alloy valve pipe fitting is heated to 360 DEG C and is incubated 12 hours;Drop to 310 DEG C with 2 DEG C/min of rate of temperature fall afterwards, be incubated 8 hours, after drop to 270 DEG C with 1 DEG C/min of rate of temperature fall, be incubated 4 hours, after drop to 210 DEG C with 1 DEG C/min of rate of temperature fall again, be incubated 5 hours, air cooling to room temperature,
After heat treatment, described valve pipe fitting is placed on the loading stage of shot blasting equipment and carries out bead;Loading stage at the uniform velocity rotates with the rotating speed of 6rad/min;The jet angle of shot-peening is continually changing between 40-70 °;Expulsion pressure is 0.2MPa;The particle diameter of aluminium alloy bullet is 0.1mm;The shot-peening time is 90 minutes, obtains final valve pipe fitting, and described aluminium alloy bullet alloying element consists of: Zn15.6%, Cu5.6%, Ti4.6%, Mg3.6%, Sn0.016%, Ti6.6%, and surplus is aluminum and inevitable nonmetal inclusion.
A kind of investment casting prepares the method for monel valve pipe fitting, it is characterized in that, the percentage by weight of alloy composition is: Ni8.8%, Co1.8%, Zn5.8%, Cr0.058%, Sb0.38%, V0.038%, Fe0.038%, Nb0.018%, Mn0.018%, Ce0.058%, Mo0.038%, surplus is copper and inevitable nonmetal inclusion
The preparation method of institute's monel valve pipe fitting, comprise the following steps: require to carry out dispensing according to above-mentioned monel chemical composition, it is initially charged fine copper ingot, after fine copper ingot melts, adds nickel zinc alloy, then add cobalt, it is eventually adding containing other alloying elements, smelting temperature is 1380 DEG C, cast: cast temperature is 1360 DEG C, after carry out the demoulding, the monel valve pipe fitting obtained is incubated 120 minutes at 860 DEG C, then carries out Quenching Treatment in this temperature;Cooldown rate is more than 30 DEG C/sec;Afterwards copper alloy valve pipe fitting is heated to 360 DEG C and is incubated 12 hours;Drop to 310 DEG C with 2 DEG C/min of rate of temperature fall afterwards, be incubated 8 hours, after drop to 270 DEG C with 1 DEG C/min of rate of temperature fall, be incubated 4 hours, after drop to 210 DEG C with 1 DEG C/min of rate of temperature fall again, be incubated 5 hours, air cooling to room temperature,
After heat treatment, described valve pipe fitting is placed on the loading stage of shot blasting equipment and carries out bead;Loading stage at the uniform velocity rotates with the rotating speed of 6rad/min;The jet angle of shot-peening is continually changing between 40-70 °;Expulsion pressure is 0.2MPa;The particle diameter of aluminium alloy bullet is 0.1mm;The shot-peening time is 90 minutes, obtains final valve pipe fitting, and described aluminium alloy bullet alloying element consists of: Zn15.8%, Cu5.8%, Ti4.8%, Mg3.8%, Sn0.018%, Ti6.8%, and surplus is aluminum and inevitable nonmetal inclusion.
The invention has the beneficial effects as follows:
Hot investment casting monel valve pipe fitting of the present invention requires mould and the technique of design according to finished product, refine crystal grain, decrease monel internal flaw, improve the ductility of monel, improve the compactness of monel valve pipe fitting, simplify technique, improve production efficiency, reduce production cost.
Detailed description of the invention
Embodiment 1:
A kind of method that investment casting prepares monel valve pipe fitting is provided, it is characterized in that, the percentage by weight of alloy composition is: Ni8.6%, Co1.6%, Zn5.6%, Cr0.056%, Sb0.36%, V0.036%, Fe0.036%, Nb0.016%, Mn0.016%, Ce0.056%, Mo0.036%, surplus is copper and inevitable nonmetal inclusion
The preparation method of institute's monel valve pipe fitting, comprise the following steps: require to carry out dispensing according to above-mentioned monel chemical composition, it is initially charged fine copper ingot, after fine copper ingot melts, adds nickel zinc alloy, then add cobalt, it is eventually adding containing other alloying elements, smelting temperature is 1380 DEG C, cast: cast temperature is 1360 DEG C, after carry out the demoulding, the monel valve pipe fitting obtained is incubated 120 minutes at 860 DEG C, then carries out Quenching Treatment in this temperature;Cooldown rate is more than 30 DEG C/sec;Afterwards copper alloy valve pipe fitting is heated to 360 DEG C and is incubated 12 hours;Drop to 310 DEG C with 2 DEG C/min of rate of temperature fall afterwards, be incubated 8 hours, after drop to 270 DEG C with 1 DEG C/min of rate of temperature fall, be incubated 4 hours, after drop to 210 DEG C with 1 DEG C/min of rate of temperature fall again, be incubated 5 hours, air cooling to room temperature,
After heat treatment, described valve pipe fitting is placed on the loading stage of shot blasting equipment and carries out bead;Loading stage at the uniform velocity rotates with the rotating speed of 6rad/min;The jet angle of shot-peening is continually changing between 40-70 °;Expulsion pressure is 0.2MPa;The particle diameter of aluminium alloy bullet is 0.1mm;The shot-peening time is 90 minutes, obtains final valve pipe fitting, and described aluminium alloy bullet alloying element consists of: Zn15.6%, Cu5.6%, Ti4.6%, Mg3.6%, Sn0.016%, Ti6.6%, and surplus is aluminum and inevitable nonmetal inclusion.
Embodiment 2:
A kind of method that investment casting prepares monel valve pipe fitting is provided, it is characterized in that, the percentage by weight of alloy composition is: Ni8.8%, Co1.8%, Zn5.8%, Cr0.058%, Sb0.38%, V0.038%, Fe0.038%, Nb0.018%, Mn0.018%, Ce0.058%, Mo0.038%, surplus is copper and inevitable nonmetal inclusion
The preparation method of institute's monel valve pipe fitting, comprise the following steps: require to carry out dispensing according to above-mentioned monel chemical composition, it is initially charged fine copper ingot, after fine copper ingot melts, adds nickel zinc alloy, then add cobalt, it is eventually adding containing other alloying elements, smelting temperature is 1380 DEG C, cast: cast temperature is 1360 DEG C, after carry out the demoulding, the monel valve pipe fitting obtained is incubated 120 minutes at 860 DEG C, then carries out Quenching Treatment in this temperature;Cooldown rate is more than 30 DEG C/sec;Afterwards copper alloy valve pipe fitting is heated to 360 DEG C and is incubated 12 hours;Drop to 310 DEG C with 2 DEG C/min of rate of temperature fall afterwards, be incubated 8 hours, after drop to 270 DEG C with 1 DEG C/min of rate of temperature fall, be incubated 4 hours, after drop to 210 DEG C with 1 DEG C/min of rate of temperature fall again, be incubated 5 hours, air cooling to room temperature,
After heat treatment, described valve pipe fitting is placed on the loading stage of shot blasting equipment and carries out bead;Loading stage at the uniform velocity rotates with the rotating speed of 6rad/min;The jet angle of shot-peening is continually changing between 40-70 °;Expulsion pressure is 0.2MPa;The particle diameter of aluminium alloy bullet is 0.1mm;The shot-peening time is 90 minutes, obtains final valve pipe fitting, and described aluminium alloy bullet alloying element consists of: Zn15.8%, Cu5.8%, Ti4.8%, Mg3.8%, Sn0.018%, Ti6.8%, and surplus is aluminum and inevitable nonmetal inclusion.