如何提高混砂机刮砂板使用寿命是每个铸造车间都会遇到的问题。我厂使用的S714辗轮式混砂机,原内外刮砂板采用厚20毫米的A3钢板,并经渗碳处理,渗碳深度2.5～3毫米,淬火硬度HRC45,但投入使用后仅一两个月就出现明显磨损,因而形成底盘结砂,造成阻力忽大忽小,负荷突变,从而经常引起电器系统故障,影响生产顺利进行。经过多种途径试验改进,最后找到一种镶焊硬质合金的办法,刮板寿命可达7～8年或更长的时间。具体做法:先按图1、2尺寸,在厚20毫米的A3钢板上划线,用 How to improve the sand mixer sand scraper life is encountered in each casting shop problems. I used S714 rolling wheel mixer, the original inside and outside the scraper with a thickness of 20 mm of A3 steel, and carburized, carburizing depth of 2.5 to 3 mm, quenching hardness HRC45, but after putting into use only one or two Months obvious wear and tear, resulting in chassis sand, causing drag suddenly big, sudden changes in load, which often lead to electrical system failure, affecting the smooth production. After a variety of ways to improve the test, finally found a way of welding the cemented carbide, scraper life of up to 7 to 8 years or longer. Specific approach: first press Figure 1,2 size, in the thick 20 mm A3 steel crossed, with