悬浮铸造在高铬铸铁耐火砖模上应用研究.pdf

学兔兔 Ju1．2009 · 726· VO1．58 NO．7 悬浮铸造在高铬铸铁耐火砖模上的应用研究 戴斌煜 (南昌航空大学材料科学与工程学院，江西南昌330063) 摘要：以铁粉作悬浮剂，采用悬浮铸造制造高铬铸铁耐火砖模。材料显微结构分析及力学性能测试表明，加入o．5‰1．o％ 悬浮剂，可使铸件组织细化，碳化物由原来的连续网状变为断续状，显著提高了材料的耐磨性。生产应用表明，采用 悬浮铸造高铬铸铁耐火砖模和不采用悬浮铸造的比较，使用寿命提高了88．2％。 关键词：悬浮铸造；高铬铸铁；耐火砖；成形模具 中图分类号：TG249．9；TG143．9 文献标识码：A 文章编号：1001—4977(2009)07—0726—03 Application of Suspension Casting to Firebrick FOrming Dies of High．ChrOmiUm Cast Iron DAI Bin—yu (School of Material Science and Engineering，Nanchang Hangkong University， Nanchang 330063，Jiangxi，China) Abstract：With iron powder as suspending agent and using suspension casting technique，firebrick fOrming dies of high—chrOmium cast iron were produced．Microstructure analysis and mechanical properties test results indicate that the addition of 0．5％一1．0％ suspending agent contributes to the refinement of cast micrOstructure and the carbide distribution transforms fr0m continuous net—shape to disconnected，and the wear resistance of the high．chromium cast iron is significantty improved． Production application shows that the service life of forming dies of firebrick produced by this technique is as 1．882 times as that of dies produced by traditional method． Key words：suspension casting；high-chromium cast iron；firebrick；forming die 悬浮铸造是前苏联在20世纪60年代发明的一种铸 在质量，没有充分发挥高铬铸铁的优越性嘲。采用悬浮 造工艺。该工艺在改善合金组织，提高铸件质量和性 铸造工艺控制高铬铸铁的凝固过程，细化结晶组织， 能方面取得了很好的效果，已在碳钢、合金钢、铸铁、 减少或消除铸造缺陷，可提高耐火砖模的使用寿命。 有色合金铸件生产中得