发动机缸体用高强度灰铸铁切削加工性能研究  

Study on Machinability of High Strength Gray Cast Iron for Engine Cylinder

作　　者：王宇飞[1] 任凤章[1] 黄胜操[2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]中国一拖集团有限公司工艺材料研究所,河南洛阳471004

出　　处：《铸造》2015年第1期47-49,54,共4页Foundry

基　　金：河南省科技创新杰出人才支持计划项目(144200510001)

摘　　要：分别选用Ba Si/Sr Si孕育剂,经相同合金化制备了两种强度相当的发动机缸体用高强度灰铸铁试样。对比研究了两种试样的力学性能及显微组织,从所受切削力的大小以及对刀具的磨损程度评价了两种试样的切削加工性能。结果表明:具有同等强度的两种试样,其硬度基本相同;Sr Si孕育的试样其断面敏感性优于Ba Si孕育的试样;在相同切削条件下,切削Ba Si孕育的试样时,其刀具磨损较严重,刀尖部位网状裂纹较多;Sr Si孕育的试样其切削合力比Ba Si孕育的试样降低了7%。Two kinds of high strength gray cast iron for engine cylinder with the same tensile strength were prepared in the experiment, by adding the same alloy elements but selecting two different inoculants of BaSi/SrSi. The mechanical properties and microstructure of two kinds of samples were comparatively studied, and the machinability was evaluated through the cutting force and cutting-tool wear. The results show that the two kinds of samples with the same tensile strength and approximate hardness; the section sensitivity of the sample inoculated by SrSi are better than BaSi; under the same conditions, during cutting the sample inoculated by BaSi, the cutting-tool wear is more serious, and the reticular crack of tool nose is more; 7% resultant tool force was reduced in cutting the sample inoculated by SrSi in contrast with BaSi.

关 键 词：发动机缸体 高强度灰铸铁 切削加工性能 BaSi/SrSi孕育剂 切削力 刀具磨损 

分 类 号：TG251[金属学及工艺—铸造]