摘要
研究了合金成分、烧结气氛对Fe Mo Mn Sn Ce C系合金的力学性能与烧结温度的影响以及在烧结合金中的作用机理。结果表明 :适量的Mn、Sn、混合稀土和氨燃烧氮基保护气氛均可加速该系合金的烧结进程 ,降低其烧结温度 ,改善其力学性能 ,而且具有协同、叠加强化效果。其强化作用主要体现在稀土元素的脱氧保碳、变质夹杂物、细化晶粒 ,Mn、Sn元素的固溶强化以及氨燃烧氮基保护气氛对烧结热效率、合金表层脱碳状况、烧结活化能的改善等方面。该系合金在氨燃烧氮基保护气氛中的合适烧结温度范围为 10 2 5～ 10 75℃ ,比Fe Mo Ni C系合金的烧结温度降低了 12 0～ 180℃。
The influence of chemical composition of alloy and sintering atmosphere on the properties and sintering temperature of Fe Mo Mn Sn Ce C sintered alloy has been studied. The results show that adding appropriate content of manganese, tin and mixed rare earths to Fe Mo Mn Sn Ce C sintered alloy,and using nitrogen based atmosphere produced by ammonium burnt as its sintering atmosphere, can speed up the sintering process, reduce sintering temperature and improve mechanical properties. The strengthening effects include deoxidate mixed rare earths, preserve cardon, refine grains and modify impurity. Manganese and tin have a better solution hardening effect. The sintering thermal efficiency the state of decarburized layer of sintered alloy the sintering activation energy can be improved when using nitrogen based atmosphere produced by ammonium burnt as sintering atmosphere.In nitrogen based atmosphere with 5～10% H 2, the extent of the sintering temperature of Fe Mo Mn Sn Ce C is 1025～1075℃. It made a 120～180℃ reduction in the sintering temperature than that of Fe Mo Ni C.
出处
《机械工程材料》
CAS
CSCD
北大核心
2002年第7期28-32,共5页
Materials For Mechanical Engineering
基金
湖南省自然科学基金资助项目 (0 0JJY2 0 47)
