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控制喷丸不仅是一种强化金属的重要手段,而且是一种经济、节能、用途广阔又急待提倡的工艺方法。如图所示、这种工艺是用普通钢丸或不锈钢丸,玻璃丸或陶瓷丸高速喷射被处理件,通过控制喷丸材质、形状、尺寸与硬度,以及射流强度,角度与均匀性等参数,获得预期的应变强化层深度及其内的残余压应力分布状态。强化层深度决定于工艺要求,对于圆筒状零件,有的规定:单向喷丸时,残余压应力层深度为壁厚的10％;双向喷丸时,为壁厚的5％。有的报道.残余压应力层的深度范围为0.25～2.5mm。
Shot peening control is not only an important means of strengthening the metal, but also an economical, energy-saving, broad-based and urgent to promote the process. As shown in the figure, this process is to spray the material to be treated by ordinary steel shot or stainless steel shot, glass shot or ceramic shot at high speed. By controlling shot blasting material, shape, size and hardness, and jet strength, angle and uniformity , The expected depth of strain enhancement layer and its residual compressive stress distribution are obtained. Reinforced layer depth depends on the process requirements, for cylindrical parts, and some provisions: one-way shot peening, residual compressive stress layer depth of 10% of the wall thickness; two-way shot peening, wall thickness of 5%. It has been reported that the depth of residual compressive stress ranges from 0.25 mm to 2.5 mm.