强烈淬火对20CrMnTi渗碳钢原始奥氏体晶粒的影响  

Effect of Intensive Quenching on the Original Austenitic Grains of 20CrMnTi-carburizing Steel

作　　者：张清华[1] 侯玉柏[1] 王旭[1] 窦英伟 李琪 

机构地区：[1]北京矿冶研究总院,北京100160 [2]山东省水文仪器研制中心,潍坊261000 [3]中核四〇四有限公司,兰州730000

出　　处：《热喷涂技术》2014年第3期69-72,42,共5页Thermal Spray Technology

基　　金：国家自然科学基金青年基金(51201012);国家高技术研究发展计划"863计划"课题(2012AA03A512)

摘　　要：通过金相实验研究了经液氮、CaCl2水溶液及二者为淬火介质的强烈淬火对20CrMnTi渗碳钢原始奥氏体晶粒的影响。研究表明:任何工艺下均发生了不同程度的奥氏体的动态再结晶,其中CaCl21s+液氮6s冷却条件下的再结晶程度最高,表层的奥氏体再结晶程度高于心部。The effect of intensive quenching in liquidnitrogenon, CaC12 solution and liquidnitrogen＋CaCl2 on the original austenitic grains of 20CrMnTicarburizing steel was studied by metallographicmicroscope. The results show that different degrees of the dynamic recrystallization of austenite were found in all the heat treatment technology, the highest degree of recrystallizationof austenite is in CaC12 ls＋liquidnitrogen on 6s quenchingmedium. The degree of recrystallizationof austenite in surface is high than the heart.

关 键 词：20CRMNTI钢 强烈淬火 晶粒尺寸 再结晶 

分 类 号：TG174.4[金属学及工艺—金属表面处理]