摘要
使用Gleeble-1500热模拟机测定不同硼含量的低碳钢试样的热塑性.结果表明：其它成分相当,w（Bs）=0.01%的试样,在900～1300℃的热塑性较差,其断面收缩率仅在23%～39%;在1100～1300℃,硼含量w（Bs）=0.0029%试样的热塑性较好,特别是在1100℃和1200℃时,比不含硼试样的热塑性明显提高,说明适量硼含量能够改善低碳钢在这一温度区间的热塑性.用扫描电镜观察断口形貌,w（Bs）=0.01%和w（Bs）=0.005%的试样在900℃和1100℃均以沿晶脆性断裂为主;在1000℃时,w（Bs）=0.01%的试样是混合断口,w（Bs）=0.005%的试样以延性断裂为主.
To determine hot ductility of low carbon steel with different boron content by Gleeble - 1500 hot simulating test. The results show that the samples with 0. 01 percent content of B, have a worse hot ductility and RA value lies in the range from 23 to 39 percent at the temperature range of 900 - 1 300 ℃ ; The samples with 0. 002 9 percent content of B. show a better hot ductility than the samples without boron at temperatures between 1 100 ℃ and 1 300 ℃, especially at 1 100℃ and 1 200 ℃. The result shows that appropriate content of B, can improve the hot ductility in this temperature range. The samples with 0. 005 and 0.01 percent content of B, are intergranular brittleness failure measured by SEM at temperatures between 900℃ and 1 100 ℃ ; the sample with O. 01 percent content of boron is mixture rupture, while the sample with 0.005 percent contert of boron is ductile rupture plasticity at 1 000 ℃.
出处
《金属制品》
2006年第2期38-41,共4页
Metal Products
关键词
低碳钢
硼含量
热塑性
low carbon steel
boron content
hot plasticity
作者简介
李文英 1976年生,硕士,青岛钢铁控股集团公司技术中心工程师.
陈伟庆 1951年生,教授,北京科技大学冶金与生态工程学院博士生导师.
袁辉 1974年生,硕士,首钢技术研究院工程师.
李永东 1952年生,首钢技术研究院教授级高工.
