These conclusions are important theory to guide the study of the formation mechanism of cold cracking in the two sides of fusion line of dissimilar steel welded joint.

所得结论、对研究异种钢接头熔合线两侧的冷裂纹的形成机理有其理论指导作用。

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The correctness of those conclusions is proved by theresults of metallographic observations and hardness tests of the dissimilar steel welded joint ofCr30Ni9/high carbon steel.

利用异种钢接头的金相观察和硬度测试结果，验证了所得结论的正确性。

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