一种Cr-Mo-V渗氮钢的合金设计及性能测试  

Alloy design and performance test of a Cr-Mo-V nitriding steel

作　　者：邓传印 闵永安[1] 廖建雄[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《金属热处理》2014年第2期1-6,共6页Heat Treatment of Metals

基　　金：国家"十一五"科技支撑计划(2007BAE51B04)

摘　　要：针对渗氮性能、热稳定性及淬透性要求,在33CrMoV12-9和40CrMoV13-9钢基础上调整化学成分,并借助JMatPro软件探究其热强性,设计了BTHJ渗氮钢。晶粒度、端淬试验以及与38CrMoAl钢对比进行的渗氮和热稳定性试验表明:920℃奥氏体化后BTHJ钢的晶粒度为10级,淬透深度可达80 mm;调质后经550℃保温60 h,硬度维持在40 HRC以上,具有较好的热稳定性;气体渗氮后表面硬度1017 HV0.2,渗氮层硬度梯度平缓,无脉状组织,渗氮性能良好,各项性能均优于38CrMoAl钢。Considering the nitriding property, thermal stability and hardenability, a nitriding steel BTHJ based on the chemical compositions of 33CrMoV12-9 and 40CrMoV13-9 steels was developed. Phase calculation with JMatPro software was made to analyze its thermal stability in theory, while some technical tests like grain size examination, end quenching experiment, nitriding test and thermal stability test （38CrMoA1 was employed in both the last two tests） were carried out to get a better understanding of the BTHJ steel. The results show that when the BTHJ steel is austenitized at 920 ℃ , a 10 grade grain size and a hardened depth of 80 mm can be obtained. The hardness of BTHJ steel quenched and tempered can preserve above 40 HRC when then heating hold at 550 ℃ for 60 h ; the surface hardness of nitrided BTHJ steel is 1017 HV0.2 and the nitrided layer has a gentle hardness gradient without vein structure, which shows that the BTHJ steel has superior thermal stability and nitridability than 38CrMoA1 steel.

关 键 词：渗氮钢 合金设计 热稳定性 相图计算 

分 类 号：TG142.33[一般工业技术—材料科学与工程]