rail welding seam
... 轨道参数 track parameter 钢轨焊缝 rail welding seam 巡回检查 inspection tour ...
基于60个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
研究结果表明：在不预热条件下，用KD286焊补钢轨，焊缝组织为柱状奥氏体组织，熔合区和过热区不可避免地产生脆硬的马氏体组织。
The results show that:under the no preheating condition, the microstructure of weld metal is columnar austenitic, and brittle martensite exists in the fusion zone and over-heated zone unavoidably.
youdao
应用推荐
模块上移
模块下移
不移动