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Cr12钢为高碳高铬钢。这种钢的奥氏体具有高的稳定性,所以断面在200～300mm~2的工具,加热到1000～1100℃淬火能完全被淬透,它用油冷、空冷都可淬硬。所以这种钢材在国内外被广泛用作冷作模具用钢,尤对高寿命要求的电机定转子模具更为适用。 我厂是专业模具制造厂,Cr12钢的冷作模具占较大的比重。但在对这类钢的模具在装配前进行磁粉探伤时,经常发现在模具的两平面存在磨削裂纹。我厂73年上半年统
Cr12 steel for high-carbon high-chromium steel. This austenitic steel with high stability, so the section in the 200 ~ 300mm ~ 2 tools, heated to 1000 ~ 1100 ℃ quenching can be fully hardened, it is oil cooling, air cooling can be hardened. Therefore, this kind of steel is widely used as cold-working die steel at home and abroad, especially for high-life motor stator and rotor molds. Our factory is a professional mold factory, Cr12 steel cold die accounted for a larger proportion. But in the mold of such steel in the assembly before the magnetic particle inspection, it is often found in the two planes of the mold grinding cracks. I plant the first half of the year 73 system