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利用EBSD技术研究了不同热轧温度下436不锈钢热轧织构的变化规律和显微组织特征。试验中选取不同的热轧初轧和终轧温度:分别在1 080和1 050℃开轧,850和800℃终轧。结果表明:较低温下开轧、终轧晶粒内部的缺陷较多,表现为较大的累积取向差,而较高温度下开轧、终轧其累积取向差明显低于低温热变形下的样品;在较高温条件下变形会形成很强(001)[110]织构组分,较低温度下变形在其亚表层和中心层出现了与冷轧织构组分相似的(001)[110]、(112)[110]和一定量的γ织构组分。
The EBSD technique was used to study the change rule and microstructure of 436 stainless steel during hot rolling at different hot rolling temperatures. Different rolling hot rolling and finishing hot rolling temperature were selected in the experiment: rolling at 1 080 and 1 050 ℃ and finishing rolling at 850 and 800 ℃ respectively. The results show that there are more defects in the open rolling and finish rolling grains at lower temperature, which show a larger cumulative orientation difference, while the cumulative orientation difference of the open rolling and final rolling at the higher temperature is obviously lower than that under the low temperature thermal deformation (001) [110] texture was formed by deformation under higher temperature, and deformed at lower temperature, the (001) [ 110], (112) [110] and a certain amount of γ texture components.