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我厂从八四年开始试生产高磷铸铁闸瓦,因为高磷铸铁闸瓦具有耐磨性好及制动时火花少等特点。高磷铸铁的成分为:C 2.6～3.1%,Si 2.2～3.0%,Mn 0.8～1.2%,P 2.0～2.5%,S≤0.15%。大家知道,一般铁含磷较低,含锰也不高。要提高磷、锰含量在配料时需加入磷铁和锰铁,而磷铁和锰铁的价格较高,这样将使成本增加。我厂采用包钢产的铌磷铁(价格和普通生铁相近)生产高磷闸瓦以来,不但能保证产品质量,而且每块闸瓦可降低成本0.5元,一年就可节约成本六万元左右。铌磷铁的化学成分为
Our factory started trial production of high phosphorus cast iron brake shoe from 1984, because the high phosphorus cast iron brake shoe has the characteristics of good abrasion resistance and less spark when braking. The composition of the high phosphorus cast iron is: C 2.6-3.1%, Si 2.2-3.0%, Mn 0.8-1.2%, P 2.0-2.5%, S ≦ 0.15%. We all know that iron is generally low phosphorus, manganese is not high. To increase the phosphorus, manganese content in the ingredients need to add phosphorus and ferromanganese, and phosphorus and ferromanganese prices higher, so that the cost will increase. I plant using Baotou steel production of niobium phosphate (similar to the price of ordinary pig iron) to produce high-phosphorus brake shoe, not only to ensure product quality, and each brake shoe can reduce costs 0.5 yuan a year can save costs 60,000 yuan about. Niobium phosphorus iron chemical composition