18CrNiMo7-6制造风电行星轮锻件浸蚀检验异常原因分析  

Cause analysis of abnormal etching test of 18CrNiMo7-6 wind power planet wheel

作　　者：董娟 蔡丰伟 陈永祥 DONG Juan;CAI Fengwei;CHEN Yongxiang(Research Institute,Jiangyin Xingcheng Special Steel Works Co.,Ltd.,Jiangyin 214429,China;Wind Power Division,Chongqing Gearbox Co.,Ltd.,Chongqing 402263,China)

机构地区：[1]江阴兴澄特种钢铁有限公司研究院,江苏江阴214429 [2]重庆齿轮箱有限责任公司风电事业部,重庆402263

出　　处：《物理测试》2023年第4期40-44,共5页Physics Examination and Testing

摘　　要：通过对模铸材18CrNiMo7-6钢风电行星轮锻件的化学成分、气体含量、硬度、非金属夹杂物检测,分析了模铸材18CrNiMo7-6钢锻件浸蚀检测异常的原因。结果表明:模铸材18CrNiMo7-6钢水脱氧不彻底或浇注时保护措施不完善引起与空气接触,钢中的Al被氧化成Al_(2)O_(3)最终在风电行星轮锻件中残留并弥散分布,导致锻件浸蚀检测不合格,对锻件样品浸蚀重现分析,任一个截面上进行低倍观察,发现与浸蚀检测相同的黑色腐蚀点,进而验证了分析结论。The chemical composition,gas content,hardness and non-metallic inclusions of 18CrNiMo7-6 wind power planet wheel forgings were tested to find out the reasons for the abnormal etching test.The results showed that 18CrNiMo7-6 molten steel was not completely deoxidized or it contacted with the air due to the imperfect protective measures during pouring.Al in the steel was oxidized to Al_(2)O_(3),which was eventually remained and dispersed in the wind power planet wheel forgings,resulting in unqualified forgings etching detection.The forging samples were reanalyzed by etching test.The macroscopic examination on any cross section showed that the same black etching points could be found,which verified the analysis conclusion.

关 键 词：18CrNiMo7-6钢锻件 浸蚀检验 夹杂物 

分 类 号：TM315[电气工程—电机] TG174.3[金属学及工艺—金属表面处理]