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研究了钛和钒对于含碳3．5%、硅2．0%的铸铁抗拉强度及硬度的影响。随着钛量的增加抗拉强度先是下降,达到0. 3%左右时显著提高,然后又下降,可以认为,这主要是由于钛促使生成共晶石墨组织,减缓了石墨周围的应力集中,从而提高抗拉强度。钛量超过了上述限度导致碳化物析出数量增多,故使抗拉强度
The effects of titanium and vanadium on the tensile strength and hardness of cast iron with 3.5% carbon and 2.0% silicon were studied. With the increase of the amount of titanium, the tensile strength first decreases, reaching a significant increase of about 0.3%, and then decreases again. It can be considered that this is mainly due to the titanium to promote the formation of eutectic graphite and slow down the stress concentration around the graphite, Improve tensile strength. Titanium exceeded the above limits lead to an increase in the amount of carbide precipitation, so the tensile strength