SS400含硼钢连铸坯的高温力学性能
发布时间:2018-05-14 00:05
本文选题:含硼钢 + 高温强度 ; 参考:《钢铁》2015年07期
【摘要】:为了避免和减轻SS400含硼钢连铸坯表面裂纹,采用Gleeble-1500热模拟试验机对SS400含硼钢连铸坯的高温力学性能进行了测试,获得其在650~1350℃范围内热延塑性和高温强度的特性。试验结果表明,SS400含硼钢连铸坯的高温强度较低,且其高温强度随温度的升高而下降。SS400含硼钢的塑性区间仅在1 000~1 100℃温度范围内,该温度范围内试样的断面收缩率均大于90%;SS400含硼钢的低塑性区间较宽,第Ⅲ脆性温度区间为700~950℃,主要原因是硼在晶界的偏聚以及BN等第二相粒子在晶界析出后脆化晶界;局部区域的重熔也降低了SS400含硼钢在1 150~1 250℃温度区间内的塑性。
[Abstract]:In order to avoid and alleviate the surface cracks of SS400 boron steel continuous casting billet, the high temperature mechanical properties of SS400 boron steel continuous casting billet were measured by Gleeble-1500 thermal simulation machine, and the characteristics of thermal ductility and high temperature strength were obtained at 650 鈩,
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