离心铸造有很多优点和较高的经济效益,但是如何消除金属型离心铸铁件的白口?多年来国内外都在研究。国内有些工厂采用挂砂衬的方法消除白口,据我们所知,国内外有关金属型铸造,多采用特制涂料或挂砂衬方法来防止白口。据一些资料记载,加入少量稀土金属能消除或减少灰铁中的白口[1．3．4．6],给了很大启示,因此,我们把稀土镁合金作为孕育剂,用于HT25—47在离心铸型中浇注汽室涨圈筒料,获得无白口而且性能良好的铸件。经过一年多生产实践表明,生产稳定,工艺简便,质量良好,特简介如下: Centrifugal casting has many advantages and high economic benefits, but how to eliminate white metal centrifugal cast iron pieces? Over the years both at home and abroad are studying. Some domestic factories to use the method of hanging sand lining to eliminate white, as far as we know, at home and abroad related to metal casting, use more special paint or sand lining method to prevent white. According to some sources, adding a small amount of rare earth metal to eliminate or reduce the white mouth in gray iron [1.3.4.6] gives a great deal of inspiration. Therefore, we use rare earth magnesium alloy as inoculant for HT25- 47 In the centrifugal casting mold pouring gas cylinder chamber ring to obtain no white and good performance castings. After more than a year of production practice shows that the production of stable, simple process, good quality, special briefings are as follows: