摘要
在砂型铸造条件下．含 １．7～2．3％C、0．5～１．0％Sｉ、0．4～１．0％Mn、0．3～0．7％Cr、0．3～０．7％Ｃｕ的白口铸铁磨球经１．０～１．5％１＃稀土硅铁合金、０．１％A１处理，在８００～900℃利用铸造余热水淬一定时间，并经280～350℃回火，硬度达HRC55以上．在有效高度为4．２m的磨球跌落试验机上．跌落破碎次数超过 5万次．DTM250／390球磨机工业应用试验结果表明．磨制无烟煤的吨煤磨球磨耗比稀土低碳白口铸铁磨球降低44．8％．
Under the condition of sand casting, white cast iron grindig- ball containing l .7~ 2.3%C, 0.5~ 1.0%Si, 0.4~ 1.0%Mn, 0.3~ 0.7%Cu, trcated with 1.0~ 1.5% rare-carth ferrosilicon and 0.1 %Al was quenched by water for a certain time, when casting remainder heat of the grinding-ball had been 800~ 900℃ and tempered about 280~ 350℃. The grinding-ball hardness are above HRC55. When the effective drop height of the ball impact test machine is 4.2m, its broken number is higher than fifty thousands. The results of industri- al application in the DTM 250 / 380 mill show that the ball weight loss to pulverize one ton hard coal is 44.8 percent less than that of the rare-earth low carbon white cast iron grinfing-ball.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
1993年第2期44-50,共7页
Journal of Fuzhou University(Natural Science Edition)
关键词
磨球
白口铸铁
铸态淬火
马氏体
grinding ball
white cast iron
alloying cast iron
water quencing
