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HIGH WEAR RESISTANT TOUGH STEEL HAVING EXCELLENT FATIGUE STRENGTH 发明申请

2023-07-21 4270 300K 0

专利信息

申请日期 2025-07-10 申请号 JP2005139292
公开(公告)号 JP2006316309A 公开(公告)日 2006-11-24
公开国别 JP 申请人省市代码 全国
申请人 NACHI FUJIKOSHI CORP
简介 PROBLEM TO BE SOLVED : To provide a high wear resistant tough steel having particularly excellent fatigue strength, further having excellent wear resistance and toughness, thus having reduced wear, cracks and chipping, and suitable for dies, cutters, tools and machine parts. SOLUTION : The high wear resistant tough steel has a composition comprising, by weight, 0.1 to 2.7% C, ≤2.5% Si, ≤2% Mn, 0.3 to 20% Cr, ≤12% Mo, ≤20% W, 0.4 to 15% V, ≤20% Co and 25 to 100 ppm N, and further comprising either one selected from ≤1% Al, ≤0.5% Ti, ≤1.5% Nb, ≤0.5% B, ≤1% Zr and ≤1% rare earth elements REM (including one or more selected from La, Ce and Y), and in which the minimum value αmin. of the coefficient α showing the degree in the sharpness of the shape in the cross-section of MC type carbide grains with a diameter of the equivalent circle of 5 to 25 μm satisfies 0.70≤αmin.≤0.95. COPYRIGHT : (C)2007, JPO&INPIT


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