回火温度对淬火态S35VN刀具钢组织与性能的影响
Effects of Tempering Temperature on Microstructure and Properties of Hardened S35VN Tool Steel
刘一博 1董浩 2梁晨 2刘少尊 2闫英杰 1曹睿1
作者信息
- 1. 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 材料科学与工程学院,甘肃 兰州 730050
- 2. 中国钢研科技集团有限公司 安泰科技股份有限公司,北京 100081;河北省热等静压工程技术研究中心,河北涿州 072750
- 折叠
摘要
为降低淬火态S35VN刀具钢内的残余应力并提升其综合性能以满足最终使用要求,需对其进行回火处理.通过X射线衍射仪及扫描电子显微镜等研究淬火态S35VN钢分别经过 180、200、220℃回火处理后物相、显微组织的差异及其对合金硬度、拉伸性能及耐腐蚀性能的影响.结果表明:3 种温度回火后S35VN钢的基体均以马氏体为主,混合少量残余奥氏体,碳化物类型均以M7C3 为主,含有少量M23C6 和MC;合金的硬度下降,强度、塑性提升,180℃回火后硬度均值为 56.5 HRC,抗拉强度均值为 1844 MPa,断裂时总应变量均值为 3.89%,耐蚀性能最佳.
Abstract
In order to reduce the residual stress of quenched S35VN tool steel and improve its overall performance to meet the final use requirements,it is necessary of quenched S35VN for tempering.X-ray diffractometer and scanning electron microscope were used to study the differences of phase and microstructure of quenched S35VN steel after tempering at 180℃,200℃and 220℃,respectively,and their effects on the hardness,tensile properties and corrosion resistance of the alloy were studied.The results show that the matrix of S35VN steel is mainly martensite after three kinds of temperatures,mixed with a little residual austenite,and the carbide type is mainly M7C3,containing a little M23C6 and MC.The hardness of the alloy decreases,while the strength and plasticity of the alloy increase.After tempering at 180℃,the average hardness is 56.5 HRC,the average tensile strength is 1844 MPa,and the average total strain at fracture is 3.89%,indicating the best corrosion resistance.
关键词
S35VN钢/回火温度/基体类型/碳化物/力学性能/耐蚀性能Key words
S35VN steel/tempering temperature/matrix type/carbide/mechanical properties/corrosion resistance引用本文复制引用
基金项目
国家自然科学基金项目(51961024)
国家自然科学基金项目(52071170)
国家自然科学基金项目(52175325)
甘肃省教育厅"双一流"科研重点项目(GSSYLXM-03)
出版年
2024
NETL
NSTL
万方数据