高温均匀化退火对H13钢芯棒带状偏析和冲击性能的影响  

Effect of high-temperature homogenization on banded segregation and impact toughness of H13 steel mandrel

作　　者：陆明和[1] 田玉新[1] 蔡海燕[1] 殷光虹[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《金属热处理》2010年第8期9-14,共6页Heat Treatment of Metals

摘　　要：采用热轧态H13钢芯棒进行高温均匀化退火试验,研究了不同的保温温度、时间及冷速对带状偏析和冲击性能的影响。结果表明,H13钢在1250℃均匀化退火4 h,经快速冷却后,带状偏析明显减轻,二次碳化物和杂质元素在晶界偏聚倾向减小,冲击性能及等向性均得到提高。经生产实践检验,钢锭在锻造前进行1250℃均匀化处理,锻后快冷,钢材性能基本达到进口8407钢水平。High-temperature homogenizing experiments were carried out on hot rolled H13 steel mandrel and effects of the heating temperature,holding time and cooling rate on the banded segregation and impact toughness were investigated.The results show that homogenized at 1250 ℃ for 4 h then rapid cooled,the banded segregation in the rolled H13 steel mandrel decreases obviously,and the segregation tendency of secondary carbides and impurity along grain boundary reduces.Consequently,both the impact toughness and its isotropic performance are improved greatly.The production practice proves that the mechanical properties of H13 steel can reach the same level of imported 8407 steel by means of homogenization treatment at 1250 ℃ before forging and rapidly cooling after forging.

关 键 词：H13钢芯棒 高温均匀化 带状偏析 冲击性能 等向性能 

分 类 号：TG142.45[一般工业技术—材料科学与工程]