Research on High Temperature Mechanical Properties of GCr15 Bloom
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摘要: 采用Gleeble-1500D热/力模拟试验机，测试了不同工艺条件下GCr15钢连铸坯的高温力学性能。结果表明，随测试温度升高，铸坯的屈服强度、抗拉强度、高温弹性模量和高温塑性模量总体均呈下降趋势，且在高温奥氏体单相区，容易受外力影响而发生塑性变形，产生裂纹缺陷。热塑性曲线的测试结果表明，GCr15钢连铸板坯的二次脆性区出现在725~800℃。Abstract: The high temperature mechanical properties of GCr15 bloom, such as yield strength, tensile strength, hot elasticity and hot ductility, have been detected by thermal-tensile tests using a Gleeble-1500D system respectively.The thermal-tensile tests show that the yield strength, tensile strength, elasticity modulus and plasticity modulus of steel decrease with the increase of test temperature and the bloom has easily plasticity deformation affected by external force in high austenite temperature, then has crack defect.The second embrittlement zone of GCr15 bloom occurred in the temperature range 725℃to 800℃.
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