X65钢板板端开裂原因分析  

Cause Analysis of Shear Crack on X65 Steel Plate

作　　者：魏伟荣 李云龙[2] 李记科[2] 聂向晖[2] 

机构地区：[1]中海石油中国有限公司深圳分公司,广东深圳518067 [2]中国石油天然气集团公司石油管工程技术研究院,陕西西安710065

出　　处：《热加工工艺》2012年第4期207-209,95,共4页Hot Working Technology

摘　　要：对30.2 mm厚X65钢板板端裂纹的成因及其对钢板性能的影响进行了试验与分析。结果表明:板端裂纹产生于钢板的头部及尾部剪切面上,裂纹及其附近未见明显的夹杂及组织异常。钢板剪切过程中较小的剪刃间隙是板端开裂的主要原因,当与剪切方向呈45°的最大剪应力超过钢板剪切强度极限τmax时,钢板端面沿切应力方向开裂。The cause of the shear crack on 30.2 mm thickness X65 steel plate and its influence on the mechanical properties were analyzed.The results indicate that this kind of crack mainly locates on the top and end shear plane of the plates.No obvious inclusion and abnormal microstructure are found on the crack and adjacent region.Small blade clearance during the shearing process is the main reason for this kind of crack.If the maximum shear stress on the 45 degree exceeds the shear strength τmax of the plate,the shear surface cracks.

关 键 词：裂纹 剪刃间隙 切应力 光亮区 

分 类 号：TG142.1[一般工业技术—材料科学与工程]