吹砂所用的喷砂咀,过去一直沿用苏联最落后的铸铁咀,使用寿命一般仅1～2小时就须更换,消耗量很大。有的工厂也陆续采用过陶瓷喷咀,寿命可达十几小时,有的采用硬质合金材料的喷咀,寿命可达几十小时至一、二百小时不等。为了进一步解决寿命短的问题,四院和北京钢铁学院一起,研制成功碳化硼喷砂咀,经试用结果,寿命达一千小时以上还可继续使用。现已定点安排在三一四七厂组织生产。 Sandblasting nozzle used in blowing sand, the Soviet Union in the past has been the most backward cast iron Tsui, the service life is generally only 1 to 2 hours to be replaced, consumption is large. Some factories have also adopted ceramic nozzle, life expectancy of up to ten hours, and some use of carbide nozzle material, life expectancy up to tens of hours to one or two hundred hours. In order to further solve the problem of short life, the Fourth Hospital and Beijing Institute of Iron and Steel, the successful development of boron carbide blasting Tsui, the trial results, life expectancy of more than one thousand hours can continue to use. It has been sentinel arrangements at the factory in March 41st production.