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关于残余应力在低碳型钢中的大小和分布之前已经进行了很多研究,然而,对于高强度型钢中残余应力的测定研究甚少。高强钢和低碳钢在应力-应变曲线及高温材料特性上的差异是研究高强度焊接型钢残余应力的必要研究方面。在当前研究中,采用以厚11mm的Q460钢板焊接而成、不同的3个箱型柱做试验。切条法和钻孔法都可用于测量。最终将可看到测定的残余应力在3个箱型柱中的分布状况及其相应的简易残余应力分布图。与低碳钢的残余应力图相比较,可以发现,由高强度钢板焊接而成的箱型柱有较低的残余应力比。同时也对采用不同测定方法(切条法、钻孔法)所造成的差异进行了比较。
Much research has been done on the magnitude and distribution of residual stress in low-carbon steels, however, little is known about the measurement of residual stress in high-strength steels. The difference of high-strength steel and low-carbon steel in stress-strain curve and high-temperature material properties is the necessary research area to study the residual stress of high-strength welded steel. In the current study, welded with Q460 steel plates of 11 mm thickness, three different box columns were tested. Slice method and drilling method can be used for measuring. Finally, the distribution of the measured residual stresses in the three box columns and their corresponding simple residual stress profiles will be seen. Compared with the residual stress diagram of low-carbon steel, it can be found that the box-type columns welded by high-strength steel have a lower residual stress ratio. At the same time, the differences caused by adopting different measuring methods (cutting method and drilling method) were also compared.