【摘要】：介紹了合金球墨鑄鐵軋輥的技術要求及鑄件結構,詳細闡述了鑄件的試制方法:選用60%重RE球化劑+40%輕RE球化劑,沖入法進行球化處理,球化劑加入量1.40%;采用高Ba-Ca孕育劑進行包內孕育,加入量為0.7%,在鐵液澆注時加入0.1%、粒度為0.3~1 mm的S-O孕育劑,進行隨流孕育;采用部分奧氏體化正火+回火熱處理工藝,奧氏體化溫度為880~900℃,回火溫度為580~600℃。生產結果顯示:鑄件的抗拉強度平均為667 MPa,屈服強度平均為411 MPa,伸長率為14%,布氏硬度平均為320 HB,且鑄件的內外硬度基本一致。
[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，

本文編號：2309742