45钢电机磁轭带状组织的消除与预防  

Elimination and protection of banded structure in 45 steel magnetic yoke for electric machine

作　　者：谢贵生 石巨岩[2] 苗国民 潘小娟[3] 

机构地区：[1]永济新时速电机电器有限责任公司工艺研究所,山西永济044502 [2]太原理工大学材料科学与工程学院,山西太原030024 [3]太原钢铁有限公司太原钢铁研究所,山西太原030003

出　　处：《金属热处理》2010年第7期81-84,共4页Heat Treatment of Metals

摘　　要：某45钢电机磁轭锻造+一次正火+高温回火后断面收缩率偏低,金相观察发现在磁轭本体有轻微带状组织,返修件经二次正火+高温回火,消除了带状组织,断面收缩率达到了技术要求。新批次工件适当增大锻造比,提高终锻温度及采用合理的正火和回火工艺,达到了一次交验合格。By forging,primary normalizing and high temperature tempering,the reduction of area of a 45 steel magnetic yoke for electric machine was lower.Metallography observation indicates that slight banded structure exists in the steel magnetic yoke body.By secondary normalizing and high temperature tempering,the banded structure is eliminated,and the reduction of area of the rework products,which meet technical requirements.Further study shows that new batch products are all qualified one pass by increasing forging ratio,elevating the final forging temperature and adopting reasonable normalizing and tempering process.

关 键 词：45钢 带状组织 断面收缩率 工艺改进 

分 类 号：TG142.71[一般工业技术—材料科学与工程]