摘要
Nb、V、Ti微合金化可以显著改善铜的强度、韧性，但Nb、V、Ti微合金元素氮碳化物易在晶界析出，增加裂纹敏感性。针对LG510铜种连铸坯表面裂纹进行研究分析，通过降低、减缓结晶器传热，提高一次、二次冷却强度及均匀性，控制进拉矫机连铸坯表面温度，H型钢轧制裂边比例由27％降至5％。
Micro-alloying of Nh, V and Ti can improve the strength and toughness of steel, but Nb, V and Ti＇ s nitride and carbide easy to precipitation in the grain-boundary,increase crack-sensitivity.According to the slab surface crack,H structural section defective index reduced 27% to 5%,by slow up the crystallizer heat transfer,increased primary cooling and recooling intensity and homogeous,eontroled slab surface temperature previous into withdrawal straightening stand.
出处
《冶金信息导刊》
2015年第2期44-46,共3页
Metallurgical Information Review
关键词
微合金
连铸坯
表面裂纹
micro-alloyed steel slab surface crack
