曲轴气喷钢时,在轴颈圆角处常出现硬环、夹层两种缺陷。这些缺陷在一定程度上降低镀层的质量而影响其使用寿命,因此有必要找出缺陷的成因并提出解决办法。 一、试验的条件和方法 (一)试棒 采用模拟曲轴轴颈的圆角试棒。试棒两端装有侧板以代表轴肩,如图1所示。试样材料选用低碳钢。喷射时α端夹持。试棒表面准备采用镍拉毛。 Crankshaft gas spray steel, often appear in the journal fillet hard ring, mezzanine two defects. These defects to a certain extent reduce the quality of the coating and affect its service life, it is necessary to identify the causes of defects and propose solutions. First, the conditions and methods of test (a) test rod using simulated crankshaft journal fillet test bar. Test bar with side panels at both ends to represent the shoulder, as shown in Figure 1. Sample material selection of low carbon steel. Α-end injection when clamping. The surface of the test rod is prepared with nickel wool.