一、什么叫灰铸铁? 铸铁和铸钢的区分主要以其中的碳含量多少为基础,一般来说,把含碳量大于2.14％的铁和碳的合金叫作铸铁,小于上述碳量的铁——碳合金是属于钢的范畴。其实工业上所用的铸铁,都不是简单的铁碳二元合金,而是以铁、碳、硅为主的多元合金,除此以外还有锰、磷、硫及一些微量元素。除铁外,人们普遍只注意五个基本元素的含量,这五个元素中,碳、硅、硫受高炉冶炼生铁时的炉况及控制水平所支配,受焦炭质量的影响也很大,锰磷则主要受矿石情况的限制,尤其是磷,我国低磷铁矿较少,因而大多数生铁中含磷都较 First, what is gray iron? Cast iron and steel is mainly divided by how much of the carbon content is based, in general, the carbon content of more than 2.14% of iron and carbon alloy called cast iron, less than the above carbon iron Carbon alloy is a category of steel. In fact, the industrial use of cast iron, iron and carbon are not simple binary alloys, but iron, carbon, silicon-based multi-alloy, in addition to manganese, phosphorus, sulfur and some trace elements. In addition to iron, people generally only pay attention to the five basic elements of these five elements, carbon, silicon, sulfur by blast furnace smelting pig iron furnace conditions and control of the degree of domination by the quality of coke is also a great influence on manganese Phosphorus is mainly limited by ore conditions, especially phosphorus, less iron phosphate in our country, so most of the phosphorus in pig iron are more