高强度厚钢板止裂韧性K_(ca)与常规力学性能的相关性分析  

Relationship Analysis of Crack Arrest Toughness K_(ca) and Conventional Mechanical Properties

作　　者：薛钢[1] 宫旭辉[1] 沈传钊[2] 李冲[1] 高珍鹏 XUE Gang;GONG Xuhui;SHEN Chuanzhao;LI Chong;GAO Zhenpeng(Luoyang Ship Material Research Institute, Luoyang 471023, China;Shanghai Institute of Standardization of China Classification Society, Shanghai 200135, China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,洛阳471023 [2]中国船级社上海规范研究所,上海200135

出　　处：《材料开发与应用》2018年第2期1-7,共7页Development and Application of Materials

摘　　要：统计分析了28组采用TMCP工艺制造的高强度厚钢板-10℃止裂韧性K_(ca)与屈服强度R_(P0.2)、抗拉强度R_m、-40℃冲击功KV_2、-20℃和-40℃动态撕裂能DTE、零塑性转变温度T_(NDT)的相关性规律,结果表明,-10℃止裂韧性K_(ca)与心部抗拉强度R_m和侧面零塑性转变温度T_(NDT)的相关度较高,随着心部抗拉强度R_m的增高和侧面零塑性转变温度T_(NDT)的降低,-10℃止裂韧性K_(ca)增大;在此基础上建立了-10℃止裂韧性K_(ca)与心部抗拉强度R_m、侧面零塑性转变温度T_(NDT)和板厚t的相关性方程K_(ca)=13.358·R_m-90.530·T_(NDT)-7.324·t^(1.5)或K_(ca)=13.427·R_m-74.845·T_(NDT)-0.635·t^2。Relation between crack arrest toughness Kcaat-10℃and yield strength RP0.2,tensile strength Rm,impact toughness KV2at-40℃,dynamic tearing energy DTE at-20℃and-40℃and side-section TNDT was analyzed by 28 troops of test data of high strength heavy plates.Results indicate that crack arrest toughness Kca at-10℃is highly correlative with Rm at center section and side-section TNDT.Kca at-10℃increases with the increasing of Rmat center section and the decreasing of side-section TNDT.The relationship formula of Rmat center section,side-section TNDT,plate thickness t and Kcaat-10℃is proposed based on the above results：Kca=13.358·Rm-90.530·TNDT-7.324·t1.5or Kca=13.427·Rm-74.845·TNDT-0.635·t^2.

关 键 词：止裂韧性 抗拉强度 零塑性转变温度 板厚 回归方程 

分 类 号：TB302[一般工业技术—材料科学与工程]