Three methods of surface self-nanocrystallization for iron and steel are ultrasonic shot peening, high energy shot peening and surface mechanical attrition treatment.

实现钢铁材料表面自身纳米晶化的主要方法有超声喷丸、高能喷丸和机械研磨处理等。

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The utility model is favorable for maintenance and repair, durable in use and low in cost and can effectively separate a mass of powder-dust and steel shot.

本实用新型利于维修保养、经久耐用、成本低，对于大量的粉尘和钢丸能够有效地进行分离。

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For production of final 800 alloy U-shaped steel tubes used for steam generator heat-conduction, surface shot-blast treatment is a must.

表面喷丸是生产800合金u型蒸汽发生器传热管成品必不可少的处理工序。

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Look for our steel industry to get a shot in its arm from cheap natural gas.

FORBES: Energy Forecast 2013-2014: Convert to Natural Gas