304L不锈钢中厚板表面裂纹缺陷分析  

Analysis on Surface Cracks Defect of 304L Stainless Steel Plate

作　　者：李玉峰[1] 王建泽[1] 阮强[1] 石旭麟[1] 

机构地区：[1]酒钢集团宏兴股份公司钢铁研究院,甘肃嘉峪关735100

出　　处：《热加工工艺》2016年第21期249-251,共3页Hot Working Technology

摘　　要：利用扫描电镜和金相显微镜对304L不锈钢中厚板表面裂纹缺陷进行了分析。结果表明,裂纹缺陷主要是钢板内部奥氏体和铁素体两相比例差异较大及不均匀分布引起的。适当地降低板坯在高温加热段和均热炉高温段的保温温度,对改善热加工性能和降低裂纹发生能起到很好的作用。Surface cracks of 304L stainless steel plate were analyzed by using optical microscope （OM） and scan electronmicroscope （SEM）. The results show that the surface cracks are mainly caused by larger proportion and inhomogeneousdistribution of austenite and ferrite phases. Properly reducing the holding temperature of the slab in high temperature heatingzone and high temperature segment of the soaking furnace can play a good role in improving the thermal performance andreducing the crack occurrence.

关 键 词：304L 不锈钢 裂纹缺陷 奥氏体 铁素体 加热温度 

分 类 号：TG337.5[金属学及工艺—金属压力加工]