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我厂生产的柴油机中有一种叫加强板的零件,其形状如图示。设计要求用2mm厚的08钢板冷冲成形,然后渗碳淬火至HRC35～45。由于渗碳周期长,而且渗碳后零件较脆,我们根据低碳马氏体的性能,结合此零件的受力状况,采用冷冲后直接淬火工艺。热处理工艺是980℃盐炉加热,淬入5％盐水中,不经回火直接使用。我们将几次测定的零件含碳量与淬火后的硬度列于下表。直接淬火后的加强板经过一年多的实际使用,效果很好。即使在08钢
I plant a diesel engine is called a strengthening plate parts, its shape as shown. Design requirements with 2mm thick 08 steel cold stamping, and then carburizing and quenching HRC35 ~ 45. Due to carburizing cycle is long, and parts after carburizing brittle, we based on the performance of low-carbon martensite, combined with the stress conditions of this part, the cold quenching after direct quenching process. Heat treatment process is 980 ℃ salt furnace heating, quenching into 5% salt water, without direct use of tempering. We will be measured several parts of carbon content and hardness after quenching in the table below. Directly after quenching the strengthening of the board after more than a year of actual use, the effect is very good. Even in 08 steel