【摘要】：采用Pro/E三維建模,通過ProCAST軟件模擬了模鑄法制備3.1t的GCr15扁錠的凝固過程,分析了鋼錠充型過程中溫度場(chǎng)及固相率,預(yù)測(cè)了鋼錠可能產(chǎn)生縮松和縮孔缺陷的位置,研究了其宏觀鑄造組織。利用掃描電鏡(SEM)觀察了其微觀組織,使用屏顯式材料端面高溫摩擦磨損試驗(yàn)機(jī)研究了微觀組織結(jié)構(gòu)對(duì)摩擦磨損特性的影響。結(jié)果表明,鋼錠的凝固順序:軸向上由鋼錠底部向鋼錠帽頭處推進(jìn),徑向上從型壁向鋼錠的中心逐步進(jìn)行;鋼錠的縮孔集中在帽頭部位,鋼錠中心易產(chǎn)生縮松;條狀、六方棱柱狀的M7C3型碳化物對(duì)GCr15鑄錠的耐磨性影響顯著。
[Abstract]:The solidification process of 3.1t GCr15 flat ingot prepared by mould casting method was simulated by using Pro/E three-dimensional modeling and ProCAST software. The temperature field and solid phase ratio were analyzed during the filling process of ingot, and the position of shrinkage loosening and shrinkage hole defect of ingot was predicted. The macro casting microstructure was studied. The microstructure was observed by scanning electron microscope (SEM), and the effect of microstructure on friction and wear properties was studied by high temperature friction and wear tester. The results show that the solidification sequence of the ingot is as follows: the axis is pushed upward from the bottom of the ingot to the head of the ingot cap, and gradually goes from the mould wall to the center of the ingot in radial direction, and the shrinkage holes of the ingot are concentrated in the head of the ingot, and the shrinkage is easy to occur in the center of the ingot. The wear resistance of GCr15 ingot is obviously affected by M _ 7-C _ 3 carbide of strip and hexagonal prismatic shape.
【作者單位】： 昆明理工大學(xué)材料科學(xué)與工程學(xué)院;固體廢棄物資源化國家工程研究中心;
【基金】：國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2009AA03Z529) 國家自然科學(xué)基金資助項(xiàng)目(51601081,51665022) 云南省省級(jí)人才培養(yǎng)計(jì)劃資助項(xiàng)目(KKSY201628022) 云南省教育廳資助項(xiàng)目(2016ZZX031)
【分類號(hào)】：TG260
，

本文編號(hào)：2450555