316奥氏体不锈钢低温气体渗碳层组织与强化性能  

Microstructure and strengthening of low temperature carburizing layer for 316 austenitic stainless steel

作　　者：马飞[1] 潘邻[1] 张良界[1] 李朋[1] 朱云峰[1] 杨闽红[1] 

机构地区：[1]武汉材料保护研究所,湖北武汉430030

出　　处：《材料热处理学报》2015年第6期216-221,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50975210);科技部科研院所的技术开发基金项目

摘　　要：采用自主研发的低温气体渗碳技术对AISI316奥氏体不锈钢进行处理,目的是增强耐磨性且不损害其耐蚀性。对低温气体渗碳层显微组织、硬度梯度、耐蚀性和耐磨性进行分析。结果表明:低温气体渗碳层硬度梯度变化与其组织和碳浓度有一定关系,随渗碳层深度的不同表现出不同的组织和性能。低温气体渗碳处理前后AISI316奥氏体不锈钢的磨损机制由粘着磨损转变成磨粒磨损,S相是提高耐磨性的主要因素,470℃时表现出较好的耐磨性,其耐蚀性基本保持不变。AISI316 austenitic stainless steel was processed by using self-developed low-temperature gas carburizing technology to strengthen the abrasion resistance without reducing its corrosion resistance. Microstructure,hardness gradient,corrosion-resistance and wearresistance of the low-temperature gas carburizing layer were investigated. The results show that the hardness changes of the lowtemperature gas carburized layer have a certain relationship with both the carbon concentration gradient and microstructure,and the layer has different microstructure and properties with different gas carburizing depth. Before and after low-temperature gas carburizing,the wear mechanism of AISI316 steel is changed from adhesive wear to abrasive wear. S-phase is the main factor to improve the wear resistance of the layer. The gas carburizing layer of the steel has good wear resistance and corrosion resistance remained unchanged when gas carburizing temperature is 470 ℃.

关 键 词：低温气体渗碳 AISI316奥氏体不锈钢 耐蚀 耐磨 S相 

分 类 号：TG156.81[金属学及工艺—热处理]