摘要
采用扫描电镜及透射电镜对热轧搪瓷钢中的析出物进行了观察,应用固溶度积公式对TiC的析出量进行了计算,并测得了不同卷取温度下搪瓷钢的抗搪瓷鳞爆敏感性(TH)。研究了热轧搪瓷钢中析出物与抗鳞爆性能之间的关系。结果表明,热轧搪瓷钢中的析出物主要为微米级TiN、Ti_4C_2S_2和纳米级TiC,TiN尺寸为1~3μm,Ti_4C_2S_2尺寸为100~400 nm,TiC尺寸为7~15 nm。TiC在1075℃时开始析出,在820℃时析出结束,此时TiC的体积分数为0.2242%。卷取温度600℃搪瓷钢的TH值高于650℃卷取钢板,因为600℃卷取的搪瓷钢的析出物TiC尺寸更细小,可以获得更高的抗鳞爆性能。
Precipitates in the hot rolled enamel steel were observed by scanning electron microscopy and transmission electron microscopy.The content of precipitated TiC was calculated by the solid solubility formula and the sensibility of fish-scaling resistance（ TH） values of the steel at different coiling temperatures were measured,the relationship between fish-scaling resistance and precipitates was studied. The results show that the main precipitates in the hot rolled enamel steel are micron-scale TiN,Ti_4 C_2 S_2 and nano-scale TiC which size are1-3 μm,100-400 nm and 7-15 nm,respectively. The precipitation of TiC begins at 1075 ℃ and finishes at 820 ℃,and the volume fraction of precipitated TiC is 0. 2242%. TH value of the steel at coiling temperature of 600 ℃ is higher than that of at 650 ℃ due to the smaller size of the precipitated TiC. Better fish-scaling resistance can be obtained by using low temperature coiling process.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2017年第12期57-62,共6页
Transactions of Materials and Heat Treatment
关键词
热轧搪瓷钢
析出物
TIC
抗鳞爆性能
hot rolled enamel steel
precipitate
TiC
fish-scaling resistance
