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本文选用为改善超声波探伤质量而改变脱氧工艺生产的22mm厚16MnR正火钢板,进行了系统的力学性能和焊接性能试验。试验研究结果表明:纵横向综合性能满足标准指标要求,高低温瞬时拉伸性能较高,脆性转变温度(系列示波冲击试验测定)、无塑性转变温度(NDT)较低,断裂韧性值为中等水平。用φ4mm507焊条进行手工焊的接头区域的强度、塑性、韧性、低温性能与母材相当,可焊性良好。
In this paper, 22mm thick 16MnR normalized steel, which was modified to improve the quality of ultrasonic flaw detection by changing the deoxidation process, was selected to test the mechanical properties and weldability of the system. The experimental results show that the comprehensive performance in both longitudinal and transverse directions meets the requirements of the standard indexes, and the instantaneous tensile properties at high and low temperatures are high. The brittle transition temperature (measured by a series of oscillometric impact tests), the low non-plastic transition temperature (NDT) and the medium fracture toughness Level. The strength, ductility, toughness and low temperature performance of the joint area with φ4mm507 electrode are quite similar to that of base metal, and the weldability is good.