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(一)电铲斗齿质量攻关取得显著成效 攀矿机修厂为了提高斗齿质量,1984年组织了攻关组,在试制、探索新的斗齿材质及相应的热处理方法和改进铸造工艺方面做了大量工作,使斗齿质量明显提高,平均使用寿命达30万吨左右。使用寿命最高为46.43万吨,最低21.13万吨。提高斗齿质量的主要方法是用ZGMn_(13)Cr_2代替普通高锰钢Mn_(13),以提高抗剪强度和加工硬化能力,增加抗磨性,改进生产工艺,在冶炼上采用氧化法,铸造上采用金属型代替砂型,造成强烈的顺序凝固,提高帽口补缩作用,有效消除或减少铸造缺陷,提高了产品致密性,保证了几
(A) electric shovel tooth quality has made remarkable achievements Climbing mechanic In order to improve the quality of tooth, in 1984 organized the research group, in trial production, to explore new tooth material and the corresponding heat treatment methods and improve the casting process done A lot of work, so that the quality of tooth bucket improved significantly, the average life expectancy of 300,000 tons. The highest service life of 464,300 tons, the lowest 213,100 tons. The main method to improve the tooth quality is to use ZGMn_ (13) Cr_2 instead of common high manganese steel Mn_ (13) to improve the shear strength and work hardening ability, increase the wear resistance and improve the production process. In the smelting process, Casting on the use of metal instead of sand, resulting in a strong order of solidification, increased hat cap shrinkage effect, effectively eliminate or reduce casting defects, increased product densification, to ensure that a few