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最近,日本川崎钢铁公司技术研究所研究了钒对低合金钢热轧无缝管的缺陷的产生和对热加工性的影响等.试验钢的化学成分(%)为:0.25C.0.25Si,1.50Mn,0.013P,0.006S,0.040V,Cr,Mo(A钢);0.25C.0.26Si,1.48Mn,0.012P,0.006S,Cr,Mo(B钢).在连铸坯上取样,观察疏松的产生和偏析状况,并通过高温拉伸试验和曼内斯曼裂纹试验研究热加工性.为了研究钒对钢管内、外表面缺陷产生的影响,从试验坯的中心和表面附近取试样.另外,为了推算偏析部位在热状态下的变形抗力,测定了1000℃时的高温硬度.试验结果如下.
Recently, Japan’s Kawasaki Steel Institute of Technology researched vanadium on the low-alloy steel hot-rolled seamless tube defects and the impact on the hot workability of the test steel chemical composition (%): 0.25C.0.25Si, 1.50Mn, 0.013P, 0.006S, 0.040V, Cr and Mo (A steel); 0.25C.0.26Si, 1.48Mn, 0.012P, 0.006S, Cr and Mo In order to study the effect of vanadium on the defects of the inner and outer surfaces of the steel tube, the hot-workability was studied by the high-temperature tensile test and the Mannesmann crack test In addition, in order to calculate the segregation site in the thermal deformation resistance, measured at 1000 ℃ high temperature hardness test results are as follows.