Transactions of Materials and Heat Treatment

Title：Heating research on forging of valve body for LPG steel cylinder with complex shape

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ClassificationCode：TG307

year,vol(issue):pagenumber：2021,46(3):43-48

Abstract：

In order to meet the higher quality requirements of valve body for steel cylinder in liquefied petroleum gas (LPG) industry, based on the binary phase diagram of copper zinc alloy, the setting principle of initial forging temperature for HPb59-1 alloy in the forging process of valve body was given, and it was proposed that the specific range of initial forging temperature should be determined according to the element composition of batch in the production practice. When the mass fraction of Zn was 41%, the upper limit of initial forging temperature was 730 ℃ and the lower limit was 710 ℃, and when the mass fraction of Zn was 42%, the upper limit of initial forging temperature was 700 ℃ and the lower limit was 680 ℃, but the upper limit of initial forging temperature under other mass fractions of Zn should be calculated by linear interpolation method, and the lower limit value was 20 ℃ lower than the upper limit value. At the same time, based on the industry characteristics of complex structure for valve body, large deformation, accurate temperature setting and uniform temperature distribution of blank, a three-stage heating process was proposed, and a three-stage induction heating furnace according to the process method was designed and manufactured with the length ratio for inductor in the three heating stages of 3∶2∶1. Finally, the appropriate temperature control conditions were calculated by mathematical derivation and finite element thermal simulation, and it was found that the temperature of the boundary layer on the surface of forging blank was slightly lower than the actual forging temperature.

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王志辉（1973-），男，硕士，工程师 E-mail：715604563@qq.com

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