【摘要】 为了解和认识中厚板连铸坯高温脆化及内裂纹的形成、扩展的机制,对某些代表钢种进行60 0～1 0 5 0℃温度范围高温拉伸试验,测试试件断裂时的断面收缩率,作出脆化曲线,并分析热加工过程中化学成分、工艺参数等与高温区金属脆化行为的关系。为改进连铸工艺制度,在再加热及轧制过程中预防裂纹的危害性提供重要的参考依据。更多还原

【Abstract】 To know the mechanisms about the high temperature brittleness and the formation and propagation of the inner cracking in the medium and heavy plates tensile tests have been carried out on certain typical steel grades under high temperature of 600～1?050?℃ to determine the sectional contraction ratio of the specimen in measuring the test piece and draw a brittle curve and then analyze the dependence of the metal brittleness in the high temperature zone upon the chemical compositions and process parameters of the test piece in the process of hot working.As the results very important reference is obtained for further improvement in the continuous casting process and for prevention against cracking in the process of hot working and rolling.更多还原