高張力鋼の熔接性に及ぼすニツケルおよびクロムの影響 (第3報)

概要

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An extensive investigation was performed of the effects of nickel and chromium contents on weldability of high tensile manganese-silicon steels, forteen experimental and four commertial, which contained nickel or chromium less than 1%. The present paper, the third part, describes the results of the following tests, namely, slit-type cracking. CTS cracking, Gas cut bend, and Fillet-weld break tests. From the results of those tests, the following conclusions have been obtained ; 1. The degrees of cracking in the slit-type cracking test were not affected with increase of nickel up to about 0.9%, while increased greatly when chromium exceeded about 0.5% of content. 2. In the CTS test specimens, distinct underbead cracks were observed frequently on steels which contained over 0.49% of chromium. However, the degrees of cracking in CTS test were not always related to that of slit-type cracking test, since many micro-cracks due to banded inclusions occured in the direction of rolling especially in the CTS test specimens. Generally. CTS cracking test appeared to be less sensitive than slit-type cracking test. 3. Bending ductility of the gas cut bend test specimens was not almost affected by variation in nickel or chromium content.
社団法人溶接学会の論文
1957-05-25