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一般的白口铸铁中,碳化物连成一片或是呈连续网状分布。即使是Nihard铸铁,由于加了Ni,基体为马氏体,提高了硬度,但是碳化物分布未发生改变,因此脆性仍未改善。要改善脆性,提高韧性,必须使碳化物呈孤立状态分散分布。我们就是立足于我国资源情况下,在白口铸铁中寻求使碳化物孤立并分散分布的办法。锰是我国的富有元素,因此我们主要以锰系铸铁为主。在不同含锰量的铸铁中加入0.1
In general white cast iron, the carbides are continuous or distributed in a continuous mesh. Even with Nihard cast iron, the matrix was martensite due to the addition of Ni and the hardness was increased, but the distribution of carbides did not change, so the brittleness was not improved. In order to improve brittleness and improve toughness, it is necessary to disperse the carbide in an isolated state. We are seeking ways to isolate and disperse carbides in white cast iron based on the resources of our country. Manganese is a rich element of our country, so we mainly to manganese-based cast iron-based. In different manganese content of cast iron add 0.1