应用Gleeble3800热模拟试验机，针对27SiMn钢连铸坯，进行了热塑性测试。分析了27SiMn试样的显微组织与塑性的关系。研究了测试温度范围内钢的脆化原因。试验结果表明：550~1200℃的脆性温度区域为600~850℃，其断面收缩率ψ=23.0%~50.0%，为指导27SiMn钢的连铸生产提供理论依据。
The hot ductility of 27SiMn was measured by tensile tests on gleeble 3800. The relation between microstructure and plasticity was analysed. Brittleness reason of the steel in testing region was investigated.The test results indicate that the brittle zone is 600~850℃from550~1200℃,the percentage reduction of this area ψ=23.0%~50.0% .The results will provide theory data for the production of 27SiMn steel billet.
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