j422焊条直径选择
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j422焊条直径选择(j422焊条规格及适用范围)
焊条J422和J427有什么区别?J422为酸性焊条,焊接质量比J427差,但J422比J427容易施焊。J422与J427两种焊条的比较:1、焊条性质:J422酸性焊条,J427是碱性焊条;2、成本:J427略高;3、烘烤:J427焊前要进行焊条烘烤,现场采用焊条保温筒保温,J422不要;4、焊.
日期 2022-11-04 阅 92 j422焊条直径选择
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