摘要
Abstract
Regarding the batch cracking issue of hot upset forged 60Si2Mn round steel in a certain steel plant,various inspection methods identified the core causes as casting defects,including excessive harmful elements,internal looseness and shrinkage cavities,segregation,inclusions,and surface cracks or bubbles.From the perspective of casting quality,the cracking mechanism and influencing factors were systematically analyzed.By enhancing equipment precision,optimizing smelting and casting processes,and employing specialized protective slag,the hot upset forging pass rate increased from 92.11%to 98.09%,providing a reference for quality control of similar spring steels.关键词
60Si2Mn圆钢/铸坯缺陷/热顶锻开裂/工艺优化Key words
60Si2Mn round steel/ingot defects/hot upset cracking/process optimization
