Relationship Analysis of Crack Arrest Toughness Kca and Conventional Mechanical Properties
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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Kca与屈服强度RP0.2、抗拉强度Rm、-40℃冲击功KV2、-20℃和-40℃动态撕裂能DTE、零塑性转变温度TNDT的相关性规律，结果表明，-10℃止裂韧性Kca与心部抗拉强度Rm和侧面零塑性转变温度TNDT的相关度较高，随着心部抗拉强度Rm的增高和侧面零塑性转变温度TNDT的降低，-10℃止裂韧性Kca增大；在此基础上建立了-10℃止裂韧性Kca与心部抗拉强度Rm、侧面零塑性转变温度TNDT和板厚t的相关性方程Kca=13.358·Rm-90.530·TNDT-7.324·t1.5或Kca=13.427·Rm-74.845·TNDT-0.635·t2。
Abstract:Relation between crack arrest toughness Kca at -10℃ and yield strength RP0.2, tensile strength Rm, impact toughness KV2 at -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 Rm at center section and the decreasing of side-section TNDT.The relationship formula of Rm at center section, side-section TNDT, plate thickness t and Kca at -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·t2.
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