【单选题】
___不是奥氏体不锈钢焊条电弧焊工艺操作必须遵循的原则。
A. 采用小线能量，小电流短弧快速焊
B. 采用多层多道焊
C. 采用焊条摆动的窄道焊
D. 选用焊条碱性焊条，采用直流反接
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答案
D
解析
暂无解析
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等离子弧切割设备控制箱中的高频振荡器的作用是用来引弧的，等离子割炬接通小气流后，在钨极与喷嘴间加上一个较低电压，当把高频加在钨极与喷嘴之间时，便引燃了电极与喷嘴间的小电弧
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铁碳合金平衡图中的GS显示冷却是奥氏体析出铁素体的开始线，奥氏体向铁素体的转变是___。
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