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当前位置:首页>新闻资讯>如何判断角钢表面的裂纹?

如何判断角钢表面的裂纹?

来源:http://www.jnlhjscl.com/ 日期:2021-03-27 发布人:adminlehao

角钢可根据不同需求组成各种不同的受力构件。由于角钢在使用中具有较好的可焊性、塑性变形性能及一定的机械强度,被广泛用于金属构件、工程结构的框架以及各种建筑结构等。但是由于加工不当,角钢常常会产生裂纹,那么应如何判定角钢表面裂纹呢?

The composition of angle steel can be changed according to different requirements. Due to its good weldability, plastic deformation and mechanical strength, angle steel is widely used in metal components, engineering structure frames and various building structures. However, due to improper processing, the angle steel often has cracks, so how to determine the angle steel surface cracks?
了解检测区的结构形状,分析角钢受力情况,确定具体检测方法,通过检测仪器结合加工工艺,对裂纹做出正确判定。角钢表面裂纹判定检检测难点在于角钢边沿其形状不规则且存在圆弧过度,用超声波直探头检测时检测方向单一,很容易漏检,用斜探头检测时,由于形成端角反射,对缺陷判定难度大。
                   济南角钢
Understand the structural shape of the detection area, analyze the stress of angle steel, determine the specific detection method, through the detection instrument combined with processing technology, make a correct judgment of the crack. The difficulty of angle steel surface crack detection lies in the irregular shape of angle steel edge and excessive arc. When the ultrasonic straight probe is used for detection, the detection direction is single, so it is easy to miss detection. When the oblique probe is used for detection, it is difficult to determine the defect due to the formation of end angle reflection.
制弯产生的裂纹的方向垂直于角钢长度方向,而裂纹方向平行于角钢长度方向,且裂纹细长,两端尖锐,故此裂纹是轧制过程产生的,在制弯后裂纹发生扩散,裂纹特征更加明显。若裂纹方向垂直于角钢长度方向,则裂纹是制弯过程产生的。
The direction of the crack generated by bending is perpendicular to the length direction of the angle steel, and the direction of the crack is parallel to the length direction of the angle steel. The crack is slender and sharp at both ends. Therefore, the crack is generated during the rolling process. After bending, the crack spreads and the crack characteristics are more obvious. If the direction of the crack is perpendicular to the length direction of the angle steel, the crack is produced in the bending process.



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