硼含量对超高锰钢组织和性能的影响.pdfVIP

维普资讯 学兔兔 铸 造 Feb．2008 ·134· FOUNDRY V01．57 N0．2 硼含量对超高锰钢组织和性能的影响 何奖爱，李书琴，辛启斌，杨中东 (东北大学材料与冶金学院，辽宁沈阳110004) 摘要：在超高锰钢中加入不同含量的硼 (0．001 5％-0．006 0％)，随着硼含量的增加，在热处理后金相组织中晶界碳化物 相应减少，晶内碳化物以粒状和团块状分布；硬度在213～221HB变化；冲击韧性先升高后降低，最高值为0~k=191 J／cm2， 最低值为ak=165 J／cm 。在低冲击应力磨料磨损条件下，随硼含量的增加磨损表面形貌SEM照片切痕变浅，凿坑减少。结 果表明，超高锰钢中加入0 003％左右的硼，其综合性能较好。 关键词：超高锰钢；硼含量；冲击韧性；耐磨性能；磨损表面形貌 中图分类号：TG142，72 文献标识码：A 文章编号：1001—4977(2008)02—0134—03 Effects of Boron Content on Microstructure and Properties of Super-High Manganese Steel HE Jiang—ai，LI Shu—qin，XlN Qi—bin，YANG Zhong—dong (School of Materials＆Metallurgy，Northeastern University，Shenyang 1 1 0004，Liaoning，China) Abstract：When adding boron of 0．001 5％一0．006 0％ into the super—high manganese stee1．and water toughening treated，it was found that with the increasing of boron content，the carbide amount at the grain bounda~ decreased。and the carbides inside the crystal grain distributed in the fOrm Of particle and conglomeration；the hardness of the steel changed between HB 21 3—221：the impact toughness increased firstly and then reduced，maximum =1 91 J／cm2。m mum =1 65 J／cm2． Under the lOW impact abrasive wear．with the increasing of boron amount the SEM images of the worn surface showed that the chip trace became shallow and the pits reduced．The beRer performance can be obtained when adding 0．003％ boron into the super—high manganese stee1． Key words：super—high manganese steel；boron content；impact toughness；abrasion resistance； wear appearance 高锰钢作为耐磨材料，在抵抗强冲击，