焊接性弯曲试验,用于确定一定尺寸及形状的钢材于焊接(锻接)部分的耐弯曲性能。弯曲试验是一种考核焊接质量的较好方法。但弯曲试验并不意味着冷加工工艺过程中构件内实际需要多大的弯心,多大的弯角,它是完全不同的两个概念。拉伸破坏时,试件是单向应力状态,接头部的金属纤维层受力比较均匀,最后集中于某一薄弱环节,截面断裂。而弯曲破坏时,试件是拉弯、挤压等多向应力状态,接头部金属纤维层在复杂的 Weldability Bend test, used to determine the resistance to bending of welded (forged) sections of a given size and shape of steel. Bending test is a good way to evaluate the welding quality. However, the bending test does not mean that the bending process and how much bending angle are actually required in the component during the cold working process are two completely different concepts. Tensile damage, the specimen is unidirectional stress state, the joint part of the metal fiber layer is more uniform force, and finally focus on a weak link, section fracture. The bending damage, the specimen is bending, extrusion and other multi-stress state, the joint metal fiber layer in the complex