机械合金化高氮钢粉末烧结的正交优化和数值模型  

Orthogonal optimization and numerical model of sintering process of mechanically alloyed high nitrogen steel powders

作　　者：崔大伟[1] 孙爱玲 王宏[1] 魏文庆[1] 王金龙[1] Cui Dawei;Sun Ailing;Wang Hong;Wei Wenqing;Wang Jinlong(School of Mechanical-electronic and Vehicle Engineering,Weifang University,Weifang Shandong 260161,China)

机构地区：[1]潍坊学院机电与车辆工程学院

出　　处：《金属热处理》2018年第9期209-213,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51004077);山东省自然科学基金(ZR2011EL003)

摘　　要：对机械合金化0Cr17Mn11Mo3N高氮钢粉末进行烧结,通过正交试验研究了烧结温度、保温时间、氮分压等工艺参数对烧结性能的影响,并进一步利用多元线性回归方法建立了主要烧结性能指标的参数控制数值模型。研究表明：烧结温度和氮分压对烧结氮含量和相对密度的影响非常显著,而保温时间所起的作用很小。综合考虑确定了最佳烧结工艺为温度1260℃,保温时间120 min,氮分压0.1 MPa。针对烧结氮含量和相对密度所建立的与之相适应的多元回归数值方程拟合优度高,准确可靠,为烧结工艺的深入优化和烧结性能的精确预测提供了理论指导。The sintering process on mechanically alloyed 0 Cr17 Mn11 Mo3 N high nitrogen steel powders were operated. Effects of process parameters（ sintering temperature,holding time,nitrogen partial pressure） on sintering properties were studied by using orthogonal test,and the parameter control numerical models on sintering property indexes were also established by means of multiple linear regression. The results show that the sintering temperature and nitrogen partial pressure have very significant influence on the nitrogen content and relative density of the PM steel while the holding time has little influence. The optimal process parameters consist of sintering at 1260 ℃,holding 120 min,with nitrogen partial pressure of 0. 1 MPa. The multiple regression numerical equations indicating the effects of different sintering parameters on the nitrogen content and relative density are accurate,reliable and with high goodness of fit,which can provide an oretical guidance for the further optimization of sintering process and the precise prediction of sintering properties.

关 键 词：机械合金化 高氮钢粉末 烧结 正交优化 回归模型 

分 类 号：TF124.5[冶金工程—粉末冶金]