循环QPQ工艺对球墨铸铁渗层性能的影响  

Effects of Cyclic QPQ Technology on the Properties of Nitrided Layer of Nodular Cast Iron

作　　者：焦彬 刘森 刘宇轩 王宏宇 JIAO Bin;LIU Sen;LIU Yu-xuan;WANG Hong-yu(Changzhou CRRC Tiema Technology Industry Co.,Ltd.,Changzhou Jiangsu 213011,China)

机构地区：[1]常州中车铁马科技实业有限公司,江苏常州231011

出　　处：《热处理技术与装备》2023年第5期10-12,17,共4页Heat Treatment Technology and Equipment

摘　　要：试验研究了循环QPQ工艺对球墨铸铁QT500-7渗层显微组织、疏松程度和脆性的影响。结果表明,球墨铸铁经QPQ循环工艺处理后,始终能保持一定厚度的ε相,但渗层疏松程度严重加剧;当循环次数增加到一定程度时,平均渗层厚度变化不明显,但脆性级别变大。The effects of the cyclic QPQ process on the microstructure,porosity and brittleness of the nitri-ded layer in QT500-7 nodular cast iron were experimentally studied.The results indicated that the nodular cast iron remained a certain thickness 8 phase after QPQ cycling process treatment,but the porosity of the nitrided layer significantly increased.When the number of cycles increased to a certain extent,the average nitrided layer thickness did not appear to change significantly,but the brittleness level increased.

关 键 词：循环QPQ 球墨铸铁 渗层 疏松 脆性 

分 类 号：TG115.2[金属学及工艺—物理冶金] TG142.1[金属学及工艺—金属学]