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2報)

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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, fourteen experimental and four commertial, which contained nickel or chromium less than 1%. The present paper, the second part, describes the results of the following tests, namely, the weld maximum hardness, Jominy, Kommerell and Kinzel tesis. From the results of tests, following conclusions have been obtained ; 1. The .maximum hardness of heat-affected zone was increased appreciably by nickel addition, but remarkably by chromium. Nickel and chromium increased the maximum hardness at a rate of approximately 40 and 150 VHN per 1% increase of content, respectively. 2. The hardness at a distance, 5/8 inch from the water quenched end in Jominy test, was closely related to the maximum hardness of heat-affected zone, and increased considarably when chromium content. exceeded 0.5%. 3. The maximum bend angle in Kommerell test decreased some what with inctease of chromium content, but was not almost affected with increase of nickel up to about 1 %.4. Ductility transition temperatures of base and welded plate specimens in Kinzel test were not markedly changed with increase of nickel, but increased considarably with chromium addition. It might be considered that ductility transition temperature of Kinzel test specimens depends more on notch toughness of base metal rather than the maximum hardness of heat-affected zone.
社団法人溶接学会の論文
1957-01-25

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2報)

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