The effective methods to avoid the cracking include lowering strictly the content of impurity and adopting low temperature welding process.
有效的改进措施是严格控制杂质含量、将高温焊接工艺改为低温焊接工艺。
By evaluating the technology of new steel type and compiling reasonable process procedure, welding casing made of low temperature steel has been achieved successfully.
通过对新钢种的工艺评定，编制了合理的工艺规程，使压缩机低温钢焊接机壳获得成功。
Abstruct: The connection mode and welding technological process between tube and tube sheet, tube sheet and shell of low temperature tubular heat exchanger are discussed.
探讨了低温管壳式换热器的管子与管板、管板与壳体的连接方式及焊接工艺。
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