摘要
在碳当量 ＣＥ３．７％～４．０％范围内，研究了 ＲＥ－Ｓｂ－Ｂａ复合孕育处理对机床导轨性能的影响。试验结果表明，采用ＲＥ－Ｓｂ－Ｂａ复合孕育处理较高碳当量（ＣＥ ３．７％～４．０％）铁水，比原工艺 ７５ＳｉＦｅ孕育较低碳当量（ＣＥ ３．２％～３．４％）相比，能够获得较好的性能，尤其是导轨表面硬度的均匀性，铸态硬度≥ＨＢ２００，淬火态硬度大于ＨＲＣ４５，沿导轨面硬度落差只有ＨＲＣ４～５；且新工艺成本较低，简单易行，大大减少了废钢用量．炉料管理相对简单，产品质量稳定。
In the range of CE 3. 7% ~ 4. 0%, effects of the hardness of bed slideway of the lathe by RE Sb - Ba compound alloying have been investigated. The results show that, comparing with the old technology (dispose of high CE liquid cast iron by Si - Fe), higher hardness can be obtained by the addition of RE Sb -- Ba compound alloying, by which the hardness can reach more than 200HB in as - cast and 45 HRC in quenched stated; and it has lower cost, and largely decreases the amount of scrap steel and has a stable produce quality.
