本文選題：熔模鑄造 + K合金�。� 參考：《鑄造》2015年12期

【摘要】：采用無余量整體熔模鑄造技術(shù),成功制備出了用于某大型運(yùn)載火箭發(fā)動機(jī)上的渦殼體精鑄件,為了全面分析工藝的可行性,試驗研究了不同截面的顯微組織。結(jié)果表明:渦殼體整體上由等軸晶組成,不同截面組織均呈現(xiàn)枝晶特征,試驗測定了二次枝晶間距,并預(yù)測了截面冷卻速率與枝晶間距的關(guān)系。在較高倍數(shù)下,進(jìn)、出口法蘭截面組織,發(fā)現(xiàn)有較多的針狀δ相存在,枝晶間處的γ"相尺寸較大,數(shù)量較多,枝晶干處的γ"相尺寸較小,數(shù)量較少;渦形流道截面的針狀δ相很少,枝晶干及枝晶間的γ"相尺寸均較小,數(shù)量無明顯差別。這些其實質(zhì)與各截面的冷卻速率有關(guān)。
[Abstract]:Vortex shell investment castings for a large launch vehicle engine were successfully prepared by using no-residual integral investment casting technology. In order to analyze the feasibility of the technology, the microstructure of different cross sections was experimentally studied. The results show that the vortex shell is composed of equiaxed crystals and the structure of different cross-sections is dendritic. The secondary dendritic spacing is measured experimentally and the relationship between cross-section cooling rate and dendritic spacing is predicted. In the cross section of inlet and outlet flanges, more needle-like 未 phases are found in the cross section of inlet and outlet flanges. The size of 緯 "phase in dendrite is larger and the quantity is larger, and the 緯" phase in dendritic stem is smaller and less in quantity. There are few needle-like 未 phases in the section of the vortex channel, and the size of 緯 "phase in the dendritic stem and dendrite is smaller, and there is no obvious difference in the number of the 緯" phase. These are related to the cooling rate of each section.
【作者單位】： 鋼鐵研究總院高溫材料研究所;東北大學(xué)材料織構(gòu)與各向異性教育部重點實驗室;
【分類號】：TG249.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前5條

1 吳軍;陳國東;丁月平;江玉華;徐海登;邱遠(yuǎn)忠;;多工位自動化平臺在缸蓋和渦殼生產(chǎn)中的應(yīng)用[J];現(xiàn)代鑄鐵;2010年S2期

2 孫偉華;周維東;;水輪機(jī)渦殼用鋼14MnMoVN 的研制[J];鞍鋼技術(shù);1984年Z1期

3 ;厚36毫米14錳鉬釩氮水輪機(jī)渦殼鋼板的常溫焊接[J];焊接;1972年08期

4 汪衛(wèi)平,葉朝東;氟塑料化離心泵渦殼的壓制模具[J];機(jī)械工人.冷加工;2003年01期

5 ;[J];;年期

相關(guān)會議論文 前1條

1 吳軍;陳國東;丁月平;江玉華;徐海登;邱遠(yuǎn)忠;;多工位自動化平臺在缸蓋、渦殼等鑄件生產(chǎn)領(lǐng)域的研究及應(yīng)用[A];第九屆中國鑄造協(xié)會年會論文集[C];2010年

，

本文編號：1807852