基于饱和值调整法的真空低压渗碳工艺计算与验证

Calculation and verification of vacuum low pressure carburizing process based on saturation adjustment method

基于Fick第二定律与饱和值调整法,结合真空低压渗碳工艺控制过程,绘制了算法流程图,并利用数学计算软件编写了真空低压渗碳工艺计算程序,以20Cr钢为试验对象对该程序进行了验证。结果表明:基于饱和值调整法的真空低压渗碳工艺处理后,20Cr钢渗碳工艺总时间比传统方式约快240 s,渗碳时间节约600 s以上;渗碳工艺计算程序可以实现渗层深度的准确预测,且能满足产品的表面碳化物级别、组织形态等较高的技术要求。

Based on Fick’s second law and saturation adjustment method,combining with the control process of vacuum low pressure carburizing process,an algorithm flowchart was given out and a calculation program for vacuum low pressure carburizing process was compiled by using mathematical calculation software,then the program was verified with 20Cr steel as the test object.The results show that the total time of the carburizing process for 20Cr steel is about 240s faster than that of the traditional way,and the carburizing time is saved more than 600s by adopting the vacuum low pressure carburizing process based on the saturation adjustment method.The calculation program for carburizing process can accurately predict the depth of carburizing layer,and can meet the higher technical requirements of surface carbide grade on the product and microstructure.