Study on mechanical properties of warm compacted iron-base materials  

作　　者：李元元 倪东惠 肖志瑜 张大童 陈维平 

出　　处：《Journal of Central South University of Technology》2002年第3期154-158,共5页中南工业大学学报（英文版）

基　　金：TheNationalNaturalScienceFoundationofChina (KeyProject50 1 350 2 0 );theNationalAdvancedTechnologyResearchandDevelopmentProject(863Project 2 0 0 1AA3370 1 0 );MinistryofEducation (ExcellentPersonnelfor 21stCenturyTrainingProject[2 0 0 0 ]no .1)

摘　　要：Mechanical properties of the warm compacted iron base powder metallurgy materials were compared with those of conventional cold compacted materials. Factors such as compaction temperature, lubricant concentration and lubricant′s property were studied. A lubricant for warm compaction powder metallurgy was developed. An iron based powder metallurgy material with a green density of 7.31 g/cm 3 (a relative density of 92.5%) can be obtained by pressing the powder at 700 MPa and 175 ℃. The sintered materials have a density of 7.2 g/cm 3, an elongation of 2.1% and a tensile strength of 751 MPa compared to 546 MPa using conventional cold compaction with the same lubricant and 655 MPa using warm compaction with other lubricant. Compact density and mechanical properties were influenced strongly by the compacting temperature. Although the best quality compacts can be obtained at 175 ℃, warm compaction within 165 to 185 ℃ can give high density compacts. Evidence shows that compact density depends on the friction coefficient of the lubricant.Mechanical properties of the warm compacted iron base powder metallurgy materials were compared with those of conventional cold compacted materials. Factors such as compaction temperature, lubricant concentration and lubricant′s property were studied. A lubricant for warm compaction powder metallurgy was developed. An iron based powder metallurgy material with a green density of 7.31 g/cm 3 (a relative density of 92.5%) can be obtained by pressing the powder at 700 MPa and 175 ℃. The sintered materials have a density of 7.2 g/cm 3, an elongation of 2.1% and a tensile strength of 751 MPa compared to 546 MPa using conventional cold compaction with the same lubricant and 655 MPa using warm compaction with other lubricant. Compact density and mechanical properties were influenced strongly by the compacting temperature. Although the best quality compacts can be obtained at 175 ℃, warm compaction within 165 to 185 ℃ can give high density compacts. Evidence shows that compact density depends on the friction coefficient of the lubricant.

关 键 词：WARM COMPACTION POWDER METALLURGY MECHANICAL property 

分 类 号：TF125[冶金工程—粉末冶金]