耐热球墨可锻铸铁的热处理及其组织与硬度的试验研究  

Heat Treatment of Heat Resistant Spheroidal Graphite Malleable Cast Iron and Its Microstructure and Hardness

作　　者：孙东杰[1] 古可成[2] 那元真[2] 郭俭[2] 

机构地区：[1]沈阳航空职业技术学院,辽宁沈阳110034 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110023

出　　处：《热处理》2007年第2期34-36,共3页Heat Treatment

摘　　要：耐热球墨可锻铸铁含4%～5%Si和4%～5%Cr,其铸态硬度一般为40～45HRC,难以切削加工。试验研究表明,退火时,在880℃以下温度随炉冷却,铸铁的硬度可降低至31HRC左右,其组织为铁素体、珠光体、碳化物和石墨的混合物,从改善了切削加工性能。The heat resistant spheroidal graphite malleable cast iron contains 4% -5% Si and 4% -5% Cr, with its as-cast hardness being 40 -45 HRC and thus difficult to be machined. Investigation indicated that the hardness of cast iron will decrease to about 31 HRC and its microstructure will be a mixed structure of ferrite, pearlite , carbide and graphite, improving machining property.

关 键 词：金属基体 组织 退火 硬度 

分 类 号：TG164.2[金属学及工艺—热处理]