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本试验以热弯曲为变形方式,在实验室条件下研究了钢3中的Cu、Sn残余元素含量、加热温度、加热时间与“表面热脆”的关系。并通过工业性试验初步验证了实验室试验结果。试验表明,含Cu、Sn普碳钢影响“表面热脆”的主要因素是“加热温度”。Cu、Sn残余元素含量较高的普碳钢采用“高温轧制”工艺可避免轧材产生“表面热脆”。
In this experiment, the bending deformation of the steel was used to study the relationship between the content of Cu and Sn residual elements, the heating temperature and the heating time and the “hot surface brittleness” under the laboratory conditions. The results of laboratory tests were preliminary verified through industrial tests. Tests show that, Cu, Sn general carbon steel, “hot surface brittleness,” the main factor is the “heating temperature.” Plain carbon steel with high content of Cu and Sn residual elements can be used to prevent “hot surface brittleness” of rolled products by “high temperature rolling” process.