jingmi機(ji)械(xie)基礎鑄(zhu)件(jian)的技(ji)術要求 點,以1200×1200毫米超0級平(ping)(ping)臺(tai)為實驗(yan)(yan)對(dui)象,從材質選擇(ze)、鑄(zhu)造工(gong)(gong)藝(yi)及(ji)穩定(ding)(ding)化處(chu)理(li)等方面(mian)進行(xing)了(le)試驗(yan)(yan),并對(dui)試驗(yan)(yan)大平(ping)(ping)臺(tai)凝固過程中(zhong)的溫度場(chang)分(fen)布(bu);鑄(zhu)件(jian)工(gong)(gong)作(zuo)表面(mian)的組織、硬度分(fen)布(bu);各次(ci)穩定(ding)(ding)化處(chu)理(li)前后(hou)的殘余應力值及(ji)處(chu)理(li)過程中(zhong)的應變情況等進行(xing)了(le)實際測定(ding)(ding)。試驗(yan)(yan)結果表明,含 C3.3～3.5 Si 1.5～1.8 C_(當量(liang))3.8～4.0的鑄(zhu)鐵(tie)采用 Sn 微量(liang)合金化、Si-Ca 與 Rc-Si-Fe 復合孕育劑(ji)處(chu)理(li)的孕育鑄(zhu)鐵(tie)有較好的綜合性(xing)能和均(jun)一性(xing),工(gong)(gong)藝(yi)簡(jian)單(dan),適于做高(gao)均(jun)勻(yun)性(xing)高(gao)穩定(ding)(ding)性(xing)要求的jingmi機(ji)械(xie)的基礎鑄(zhu)件(jian).