取向硅钢的高温力学性能

特殊钢 ›› 2010, Vol. 31 ›› Issue (4): 46-48.

取向硅钢的高温力学性能

裴英豪¹, 张晨², 陈其安¹, 彭云¹, 仇圣桃²

1钢铁研究总院结构材料研究所，北京100081;
2钢铁研究总院连铸技术国家工程研究中心，北京100081

收稿日期:2010-02-05 出版日期:2010-08-01 发布日期:2022-11-20
作者简介:裴英豪(1982-),男，博士生，薄板坯连铸连轧取向、无取向硅钢的研究。
基金资助:
国家自然科学基金和宝山钢铁股份有限公司联合资助项目(50934009)

High Temperature Mechanical Properties of Grain Oriented Silicon Steel

Pei Yinghao¹, Zhang Chen², Chen Qi'an¹, Peng Yun¹, Qiu Shengtao²

1.Institute for Structure Materials, Central Iron and Steel Research Institute, Beijing 100081;
2 National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081

Received:2010-02-05 Published:2010-08-01 Online:2022-11-20

摘要/Abstract

摘要： 采用Gleeble-1500D应力/应变热模拟试验机,对实验室30 kg真空感应炉冶炼的模拟50 mm薄板坯连铸连轧流程生产的取向硅钢(0.027%C,3.06%Si)进行了高温力学性能测试。结果表明,在1×10^-3s^-1应变速率下,所测试的试验钢存在两个脆性温度区,即熔点至1 300℃的第Ⅰ脆性区和800～600℃的第Ⅲ脆性区。1390～1410℃是试验钢的裂纹敏感区间。在第Ⅰ脆性区,高温下树枝晶界面被富集溶质的液相膜包围是产生脆性的主要原因。在第Ⅲ脆性区,γ→α转变和760℃左右γ、α和Fe₃C三相共存以及晶界析出物,是造成塑性恶化的主要原因。

Abstract: High temperature mechanical properties of grain-oriented silicon steel(0.027%C,3.06%Si) melting by a 30 kg vacuum induction furnace in lab and simulating 50mm thin slab casting and rolling process have been tested by Gleeble- 1500D stress/strain thermal simulation machine.Results show that with strain rate 1×10^-3s^-1,there are two brittle temperature zones for the test steel,i.e. I brittle zone- melting point to 1300 ℃ and Ⅲ brittle zone- 800～600 ℃. 1390~1410 ℃ is crack sensitive range of the test steel. In I brittle zone the dentritic crystal boundary surrounded by liquid film of rich solute is main reason to produce brittlement.And in Ⅲ brittle zone,γ→α transformation,y,α and Fe₃C triple phase coexistence at about 760 ℃ and precipitates at grain boundary are main cause of deterioration in ductility.

裴英豪, 张晨, 陈其安′, 彭云, 仇圣桃. 取向硅钢的高温力学性能[J]. 特殊钢, 2010, 31(4): 46-48.

Pei Yinghao, Zhang Chen, Chen Qi'an, Peng Yun, Qiu Shengtao. High Temperature Mechanical Properties of Grain Oriented Silicon Steel[J]. Special Steel, 2010, 31(4): 46-48.