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They are delicately made with the process of drawing, cutting and conditioned etc. rigidly according to the standards of VDFI 8001/1994 and USA SAE2431. The particles of shot are uniformly size with the respective hardness of HV400-500, HV500-555, HV555-605, HV610-670, HV670-740 and more. And the granularity is distributed from 0.2mm to 2.0mm. The shapes of them are columnar and spherical with conditioned G1, G2, G3. Besides, their useful durability are ranged from 3500cycles to 9600 cycles.

The process of shot peening is widely used for its simple technics, easy operation, high economic benefit and obvious hardening effects. Thus the cost could be cut down. With the development of computer technology, the shot peening technics with feed-back control of information used in the factual production have already further improved the hardening quality in recent years. At president, the process has been not only applied to the spare parts of automotive industry, such as spring, link rods, bent axles, gears, rockers and camshafts etc. which endure alternative loads but also widely used in the other yields of industry. For example, the hardening treatment of shot peening could improve the fatigue strength and combining power on the plating parts. As for alloyed steel, their fatigue strength will decrease by10-60%after being detaled with any kinds of Galvanization. Otherwise the treatment can efficiently advance the fatigue strength and increase the combining power on the electroplates as well to prevent bubbling.