RQTAl_4Si_4耐热铸铁熔铸工艺研究  

Study on Melting and Casting of RQTAl_4Si_4

作　　者：黄重伯 公志光[1] 耿学庆[1] 荣福荣 

机构地区：[1]山东工业大学

出　　处：《中国铸机》1994年第5期35-37,41,共4页

摘　　要：ＲＱＴＡＩ＿４Ｓｉ＿４耐热铸铁的缺点是脆性较大，易产生裂纹。该缺点的克服需要从混砂、造型（制芯）、熔铸和清理等整个铸造生产过程考虑。该合金在熔炼及球化处理过程中，烧损量较大，因而在熔炼及浇注过程中对铁水不易过多搅拌。用冲天炉熔炼的ＲＱＴＡｌ＿４Ｓｉ＿４耐热铸铁件的金相组织比中频电炉熔炼要细密得多，但回炉料的回用是需进一步研究解决的新问题。he shortcoming of heat-resistant cast iron RQTAl_4Si_4 is brittle and apt to produce crack of which elimination demands anintegrated design of the whole casting production process from sand preparation,moulding(cor-making),melting and casting to fettling and cleaning. Because of high loss of alloy elements inmelting and spheroidizing sedundant stirring should be avoided during melting and pouring process. A much more finer microstructure of this kind of cast iron derived from cupola instead of medium-frequency induction furnace. Though a new problem of returns leaves behind.

关 键 词：耐热铸铁 熔炼 铸造 

分 类 号：TG251.3[金属学及工艺—铸造]