球铁凸轮轴等温淬火工艺研究  

An Investigation on Isothermal Quenching Process of Nodular Iron Camshaft

作　　者：沈保罗[1] 李莉[2] 岳昌林[2] 曾勇[2] 文申柳 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064 [2]成都金顶凸轮轴铸造有限责任公司,四川郫县611732 [3]四川化工职业技术学院,四川泸州315132

出　　处：《现代铸铁》2010年第3期55-59,共5页Modern Cast Iron

摘　　要：研究了等温温度和等温时间对球铁凸轮轴力学性能的影响。结果显示:(1)抗拉强度随凸轮轴等温温度的升高而降低,伸长率先升高后降低,约在380℃达到最大值;抗拉强度随着等温时间的延长而升高,伸长率先升高后降低,约在3h达到最大值。(2)本试验条件下,球铁凸轮轴合适的等温淬火工艺为:900℃×1h+380℃×3h,此工艺下得到的球铁凸轮轴抗拉强度高于900MPa,伸长率高于7%,满足使用要求。The influences of isothermal quenching temperature and isothermal holding duration on mechanical properties of the nodular iron camshaft were investigated. The results showed： a） with increase of the iso-quenching temperature the tensile strength was decreased, the elongation was increased at first, and then was reduced, and reached its maximum value at about 380 ℃; with lengthening of the isothermal holding duration, the tensile strength was increased, the elongation was increased at first and then reduced, and reached its maximum value at about 3 h; b） under the current test condition, the appropriate isothermal quenching process for the camshaft was as follows： 900 ℃×1 h＋380 ℃×3 h.By adopting this process, the tensile strength of the nodular iron camshaft was higher than 900 MPa, and its elongation was higher than 7% that has met the application requirements.

关 键 词：球铁凸轮轴 等温淬火 力学性能 

分 类 号：TG164.2[金属学及工艺—热处理]