HQ80C钢性能与组织的定量关系  

Structure-Property Relationships in a Heat-Treated Weldable Steel

作　　者：刘国权[1] 崔文暄[1] 江海 秦瑞凯 张万山 

机构地区：[1]北京科技大学 [2]鞍山钢铁公司钢铁研究所

出　　处：《北京科技大学学报》1993年第1期73-81,共9页Journal of University of Science and Technology Beijing

基　　金："七五"国家重点科技项目(No75-28-01-06)

摘　　要：研究了一种Cr-Ni-Mo-V-Ti-B多元合金化、强度高于785MPa的可焊结构钢(HQ80C)淬火态和400～700℃回火态显微组织与拉伸性能及冲击性能之间的定量关系。发现钢的韧脆转化温度(50％FATT)与马氏体板条束截线长度呈线性相关;建立了调质态钢的屈服强度计算公式。回火温度范围为500～700℃时理论计算值与实测值相对偏差均小于3％。A785MPa-grade weldable HSLA steel (HQ80C) with Cr, Ni, Mo, V, Ti, and B has been experimentally studied to determine quantitative relationships between properties (strength and toughness) and microstructures. It has been found that the ductile-brittle transition temperature (50%FATT) varies linearly with the mean intercept of martensitic packets. An empiric equation has been established to predict the yield strength of the as quenched and tempered steel; the relative deviation of the predicted yield strength values from the experimental ones are all less than 3% when the steel was tempred at 500 to 700℃.

关 键 词：HSLA钢 热处理 强度 韧性 马氏体 

分 类 号：TG142.41[一般工业技术—材料科学与工程]