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用硫酸法测定钢中稳定夹杂物,对于滚珠钢系高炭铬钢存在切削钢样难于加工的问题.我们在生产实践中将钢屑样改为类似金相块状样,可视钢材大小取全园、半园或扇形,其厚度与重量可视钢中夹杂含量而定.其优点是:一、试样加工简单,可用砂轮片直接在材上切取;二、试样具有代表性,包括夹杂物从表面至中心的分布;三、可进行高温淬火(1100℃、30分,油淬),使炭化物绝大部份固溶,炭化物分解次数明显减少,仅需一次.使流程大大缩短,操作手续简化.
Sulfuric acid method to determine the stability of steel inclusions, the ball-type high-carbon chrome steel cutting steel difficult to process the problem. We in the practice of production will be like a sample of metallurgical lumps, visible steel size The whole garden, semi-park or fan-shaped, the thickness and weight of steel inclusions can be determined depending on the content of its advantages are: First, the sample processing is simple, available grinding wheel cut directly on the material; Second, the sample representative, including Inclusions from the surface to the center of the distribution; Third, high temperature quenching (1100 ℃, 30 minutes, oil quenching), so that most of the solid solution of carbonized matter, carbonization decomposition significantly reduced the number of times, Simplified operating procedures.