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我厂产品夹层锅是一种蒸汽加热食品的压力锅,通过蜗轮蜗杆进行90°转动,因而蜗轮蜗杆成了主传动零件,它们长期在蒸汽、碱性或弱酸性气体中工作,有一定的防腐和耐磨、强度等性能要求。以往,蜗轮用铸造青铜ZQA19-4制作,成本高,铸件有气孔,质量不易控制。后来,我们试用灰口铸铁HT20-40制造,而蜗杆仍用45钢,并统统进行软氮化和氧化处理。从一年来的生产和零件服役情况看,效果还是不错的。
My factory products sandwich pot is a steam heating food pressure cooker, through the worm 90 ° rotation, so worm gear has become the main transmission parts, they are long-term steam, alkaline or weak acid gas, a certain degree of corrosion and Wear, strength and other performance requirements. In the past, the worm gear casting bronze ZQA19-4 production, high cost, castings have pores, the quality is not easy to control. Later, we tried gray cast iron HT20-40, while the worm was still used 45 steel, and all soft nitriding and oxidation treatment. From a year of production and parts service situation, the effect is still good.