發(fā)布時間：2019-04-26 05:50

【摘要】：低溫高韌性球墨鑄鐵力學(xué)性能優(yōu)良,在工業(yè)上應(yīng)用廣泛,風(fēng)力發(fā)電等領(lǐng)域的未來趨勢對其提出了更高要求。通過向鑄態(tài)球墨鑄鐵中添加改性超細(xì)SiC粉體研究其低溫韌性。結(jié)果表明:隨著改性超細(xì)SiC粉體的加入,鑄態(tài)球墨鑄鐵中的石墨球細(xì)化,球化率提高;組織分布均勻,鐵素體含量增加;在常溫、-20℃和-40℃下試樣的沖擊功分別提高19.56%、5.37%、6.15%。
[Abstract]:Low-temperature and high-toughness ductile iron has excellent mechanical properties and is widely used in industry. The future trend of wind power generation puts forward higher requirements for it. The low-temperature toughness of as-cast ductile iron was studied by adding modified ultra-fine SiC powder. The results show that with the addition of modified ultra-fine SiC powder, the graphite ball in as-cast nodular cast iron is refined and the spheroidization rate is increased, the microstructure distribution is uniform and the ferrite content is increased. The impact energy of the samples at room temperature,-20 鈩，

本文編號：2465812