合金球墨铸铁轧辊的试制
发布时间：2018-11-04 11:51
【摘要】：介绍了合金球墨铸铁轧辊的技术要求及铸件结构,详细阐述了铸件的试制方法:选用60%重RE球化剂+40%轻RE球化剂,冲入法进行球化处理,球化剂加入量1.40%;采用高Ba-Ca孕育剂进行包内孕育,加入量为0.7%,在铁液浇注时加入0.1%、粒度为0.3~1 mm的S-O孕育剂,进行随流孕育;采用部分奥氏体化正火+回火热处理工艺,奥氏体化温度为880~900℃,回火温度为580~600℃。生产结果显示:铸件的抗拉强度平均为667 MPa,屈服强度平均为411 MPa,伸长率为14%,布氏硬度平均为320 HB,且铸件的内外硬度基本一致。
[Abstract]:The technical requirements and casting structure of alloy ductile iron roll are introduced. The trial production method of casting is described in detail: 60% heavy RE spheroidizing agent 40% light RE spheroidizing agent is selected, and the spheroidizing treatment is carried out by impinging method, and the amount of nodularizing agent is 1.40%. High Ba-Ca inoculant was used to inoculate in the ladle, the amount of inoculant was 0.7, and 0.1% S-O inoculant with 0.3 mm grain size was added to the molten iron during pouring, and the inoculation was carried out with flow. Partial austenitizing normalizing and tempering heat treatment were adopted. The austenitizing temperature was 880,900 鈩，
本文编号：2309742
[Abstract]:The technical requirements and casting structure of alloy ductile iron roll are introduced. The trial production method of casting is described in detail: 60% heavy RE spheroidizing agent 40% light RE spheroidizing agent is selected, and the spheroidizing treatment is carried out by impinging method, and the amount of nodularizing agent is 1.40%. High Ba-Ca inoculant was used to inoculate in the ladle, the amount of inoculant was 0.7, and 0.1% S-O inoculant with 0.3 mm grain size was added to the molten iron during pouring, and the inoculation was carried out with flow. Partial austenitizing normalizing and tempering heat treatment were adopted. The austenitizing temperature was 880,900 鈩，
本文编号：2309742
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