摘要
研究了Mn合金化奥贝球铁标准试样和齿轮的显微组织与力学性能。结果表明,Mn合金化奥贝球铁标准试样经等温淬火和回火后的力学性能范围为σb=1000.4～1100MPa,δ=5.2%～6.8%,硬度30～33HRC,αk=70～100J/cm-(2无缺口试样),达到了EN1564-97/EN-GJS-1000-5欧洲标准。齿轮啮合后其表面残余奥氏体转变成马氏体组织,显著提高了齿轮的表面硬度。
The microstructure and mechanical properties of both the test specimens and gears made of Mn-alloyed ADI were investigated. The results showed that the mechanical property range of the isothermally quenched and tempered standard test specimens was as follows： σb=1000.4-1100MPa, δ=5.2%-6.8%; hardness=30-33 HRC, αk= 70-100 J/cm^2 （test with unnotched specimen） which has met the European Specification EN1564-97/EN-GJS-1000-5. After meshing engagement of gears the residual austenite in the surface layer of the teeth changed into martensite that obviously increased the hardness of the surface layer.
出处
《现代铸铁》
CAS
2008年第4期54-57,共4页
Modern Cast Iron
