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为了将16MnCu低合金高强度钢应用于桥梁及其他焊接结构,研究组对其焊接裂缝倾向、硬化及过热倾向、焊接接头的脆断倾向及疲劳强度进行了一系列的试验。试验用材料为小平炉冶炼并轧制成的12毫米及24毫米厚的钢板,其性能合乎YB—13—63要求,成分为含C:0.22％、Mn:1.16％、Si:0.45％、Cu:0.613％、S:0.024％、P:0.035％;试验材料的特点是含C,含CU高,含Mn低,因此各种试验是在不利的原始条件下进行的。试验内容包括裂缝、金相、硬度、低温拉伸,低温冲击和拉压疲劳试验,试件数量计933个。本文对上述试验结果进行了综合分析,并提出几点结论意见。
In order to apply 16MnCu low-alloy high-strength steel to bridges and other welded structures, the research team conducted a series of tests on the tendency of welding cracks, tendency of hardening and overheating, tendency of brittle fracture of welded joints and fatigue strength. The test materials were 12 mm and 24 mm thick steel plates which were smelted and rolled in a small hearth furnace and their properties were in compliance with the requirements of YB-13-63. The composition was composed of C: 0.22%, Mn: 1.16%, Si: 0.45%, Cu : 0.613%, S: 0.024%, P: 0.035%. The test materials are characterized by containing C, high in CU, and low in Mn, so various tests were conducted under unfavorable initial conditions. Tests include cracks, metallography, hardness, low temperature tensile, low temperature impact and tension and compression fatigue test, the number of specimens 933. In this paper, a comprehensive analysis of the above test results, and make a few comments.