CN108677091A - 一种球磨机用中碳中铬合金钢球及其制备方法 - Google Patents
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Abstract
本发明公开了一种球磨机用中碳中铬合金钢球及其制备方法,其各化学成分及质量百分比为:C:0.4‑0.7、Si:0.5‑1.0、Cr:4.4‑5.8、Mn:0.7‑1.1、Mo:0.5‑0.8、Cu:0.3‑0.6、V:0.05‑0.1、Ti:0.08‑0.14、B:0.03‑0.05、Co:0.1‑0.2、Al:0.05‑0.1、Pr:0.06‑0.08、Sm:0.03‑0.06、S≤0.03、P≤0.04、余量为Fe。本发明制得的钢球具有较高的硬度和韧性,耐磨性优异,使用寿命长,可以广泛应用于各类球磨机,市场前景广阔。
Description
技术领域
本发明涉及铸铁材料技术领域,具体涉及一种球磨机用中碳中铬合金钢球及其制备方法。
背景技术
球磨机钢球是球磨机设备研磨物料介质,通过球磨机钢球之间钢球与物料之间的碰撞摩擦产生磨剥作用,重要的基础零部件,尤其是精密工业钢球在国民经济发展中起着巨大作用,广泛应用于水泥建材、金属矿山、煤浆火电、化学工程、陶瓷等行业的粉体制备与超细深加工。钢球是球磨机主要的易磨损件,其工作繁重,工作条件苛刻,因此对钢球材质的耐磨性和韧性具有较高的要求。
发明内容
本发明的目的在于针对现有技术的不足,提供一种球磨机用中碳中铬合金钢球及其制备方法。
为实现上述目的,本发明采用的技术方案如下:
一种球磨机用中碳中铬合金钢球,其各化学成分及质量百分比为:C0.4-0.7、Si0.5-1.0、Cr4.4-5.8、Mn0.7-1.1、Mo0.5-0.8、Cu0.3-0.6、V0.05-0.1、Ti0.08-0.14、B0.03-0.05、Co0.1-0.2、Al0.05-0.1、Pr0.06-0.08、Sm0.03-0.06、S≤0.03、P≤0.04、余量为Fe。
一种球磨机用中碳中铬合金钢球的制备方法,包括以下步骤:
(1)在中频感应炉中进行熔炼,先加入废钢、生铁、硅铁熔清,再依次加入铬铁、硼铁、钼铁、钛铁、钴铁、铜,待其全部熔化后调整铁水成分,在出炉前4-6min内先后加入锰铁和钒铁,在出炉前2-4min内加入纯铝进行脱氧,出炉前进行化学成分分析,合格后即可出炉,铁水出炉温度控制在1505-1545℃;
(2)在包内冲入稀土硅铁合金变质剂进行变质孕育处理,变质剂使用前进行250-300℃的预热,变质孕育处理温度为1460-1490℃,然后往包内撒入适量的珍珠岩保温聚渣覆盖剂覆盖,并镇静6-12min,扒渣后进行浇注,浇注温度控制在1435-1455℃;
(3)将上述得到的钢球进行热处理:先加热至890-960℃,保温4-5h,再降温至460-520℃,保温2-3h,雾冷淬火后再在140-180℃下回火6-8h,然后加热至650-700℃,保温3-4h,再加热至980-1040℃,保温5-6h,沙冷淬火后再在240-320℃下回火4-6h,最后加热至1060-1120℃,保温3-5h,再降温至720-760℃,保温2-4h,油冷淬火后再在300-350℃下回火5-6h,空冷至室温即可。
本发明的有益效果:
(1)本发明成分设计合理,通过调整C、Cr的含量以及添加碳化物形成元素的Mn、Mo、Cu、V、Ti、B、Co,发挥多元合金元素的综合作用进行合金化,可以显著细化晶粒,改善组织形态,提高冲击韧性和耐磨性;
(2)本发明热处理工艺合理,经过三次淬火以及相应的回火处理后,组织为马氏体基体+奥氏体(沿晶界分布)+弥散的颗粒状碳化物,热处理过程中发生再结晶,晶粒细小,可显著提高硬度和冲击韧性;
(3)本发明制得的钢球具有较高的硬度和韧性,耐磨性优异,使用寿命长,可以广泛应用于各类球磨机,市场前景广阔。
具体实施方式
一种球磨机用中碳中铬合金钢球,其各化学成分及质量百分比为:C0.4-0.7、Si0.5-1.0、Cr4.4-5.8、Mn0.7-1.1、Mo0.5-0.8、Cu0.3-0.6、V0.05-0.1、Ti0.08-0.14、B0.03-0.05、Co0.1-0.2、Al0.05-0.1、Pr0.06-0.08、Sm0.03-0.06、S≤0.03、P≤0.04、余量为Fe。
一种球磨机用中碳中铬合金钢球的制备方法,包括以下步骤:
(1)在中频感应炉中进行熔炼,先加入废钢、生铁、硅铁熔清,再依次加入铬铁、硼铁、钼铁、钛铁、钴铁、铜,待其全部熔化后调整铁水成分,在出炉前4-6min内先后加入锰铁和钒铁,在出炉前2-4min内加入纯铝进行脱氧,出炉前进行化学成分分析,合格后即可出炉,铁水出炉温度控制在1505-1545℃;
(2)在包内冲入稀土硅铁合金变质剂进行变质孕育处理,变质剂使用前进行250-300℃的预热,变质孕育处理温度为1460-1490℃,然后往包内撒入适量的珍珠岩保温聚渣覆盖剂覆盖,并镇静6-12min,扒渣后进行浇注,浇注温度控制在1435-1455℃;
(3)将上述得到的钢球进行热处理:先加热至890-960℃,保温4-5h,再降温至460-520℃,保温2-3h,雾冷淬火后再在140-180℃下回火6-8h,然后加热至650-700℃,保温3-4h,再加热至980-1040℃,保温5-6h,沙冷淬火后再在240-320℃下回火4-6h,最后加热至1060-1120℃,保温3-5h,再降温至720-760℃,保温2-4h,油冷淬火后再在300-350℃下回火5-6h,空冷至室温即可。
经检验,产品化学成分为C0.58%、Si0.74%、Cr5.21%、Mn0.95%、Mo0.77%、Cu0.43%、V0.084%、Ti0.011%、B0.044%、Co%0.16、Al0.082%、Pr0.075%、Sm0.048%、S0.024%、P0.033%、余量为Fe。力学性能为:硬度:63.7HRC,冲击韧性:26.4J/cm2。
Claims (2)
1.一种球磨机用中碳中铬合金钢球,其特征在于,其各化学成分及质量百分比为:C0.4-0.7、Si0.5-1.0、Cr4.4-5.8、Mn0.7-1.1、Mo0.5-0.8、Cu0.3-0.6、V0.05-0.1、Ti0.08-0.14、B0.03-0.05、Co0.1-0.2、Al0.05-0.1、Pr0.06-0.08、Sm0.03-0.06、S≤0.03、P≤0.04、余量为Fe。
2.一种如权利要求1所述的球磨机用中碳中铬合金钢球的制备方法,其特征在于包括以下步骤:
(1)在中频感应炉中进行熔炼,先加入废钢、生铁、硅铁熔清,再依次加入铬铁、硼铁、钼铁、钛铁、钴铁、铜,待其全部熔化后调整铁水成分,在出炉前4-6min内先后加入锰铁和钒铁,在出炉前2-4min内加入纯铝进行脱氧,出炉前进行化学成分分析,合格后即可出炉,铁水出炉温度控制在1505-1545℃;
(2)在包内冲入稀土硅铁合金变质剂进行变质孕育处理,变质剂使用前进行250-300℃的预热,变质孕育处理温度为1460-1490℃,然后往包内撒入适量的珍珠岩保温聚渣覆盖剂覆盖,并镇静6-12min,扒渣后进行浇注,浇注温度控制在1435-1455℃;
(3)将上述得到的钢球进行热处理:先加热至890-960℃,保温4-5h,再降温至460-520℃,保温2-3h,雾冷淬火后再在140-180℃下回火6-8h,然后加热至650-700℃,保温3-4h,再加热至980-1040℃,保温5-6h,沙冷淬火后再在240-320℃下回火4-6h,最后加热至1060-1120℃,保温3-5h,再降温至720-760℃,保温2-4h,油冷淬火后再在300-350℃下回火5-6h,空冷至室温即可。
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