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CN108396249A 一种碳酸镧增韧高硬合金及其铸造和热处理方法 无效 - 撤回

一种碳酸镧增韧高硬合金及其铸造和热处理方法
摘要：
一种碳酸镧增韧高硬合金及其铸造和热处理方法，合金各元素的质量百分含量为Cr：9.0～13.0，B：2.6～2.9，C：0.7～0.9，Nb：0.4～0.8，V：0.4～0.8，Mn的含量小于0.3，La：0.03～0.7，S、P：≤0.01，余量为Fe；其中C、B总质量百分含量为：3.3～3.6；C/Cr含量比：0.06～0.08；Nb、V的总质量百分含量为：0.5～1.0。先准备好Fe-碳酸饵粉末压块准备，合金配料、熔炼与变质处理，进行熔炼、浇铸和热处理。本发明制备的铸锭整体硬度达到HRC65.1～68.9，冲击韧性达到12.5～16.4J/cm2，抗弯强度达到1195～1540MPa。
摘要（英）：

Disclosed are lanthanum carbonate toughened high-hardness alloy and a casting and heat treatment method thereof. The elements of the alloy comprise, by mass percentage, 9.0-13.0% of Cr, 2.6-2.9% of B,0.7-0.9% of C, 0.4-0.8% of Nb, 0.4-0.8% of V, less than 0.3% of Mn, 0.03-0.7% of La, 0.01% or less of S and P, and the balance Fe, wherein the total mass percentage of C and B is 3.3-3.6%, the content ratio of C to Cr is 0.06-0.08, and the total mass percentage of Nb and V is 0.5-1.0%. Fe-carbonic acid bait powder briquettes are prepared at first, alloy burdening, smelting and modification treatment are carried out, and smelting, casting and heat treatment are carried out. According to overall prepared cast ingots, the hardness reaches HRC 65.1-68.9, the impact toughness reaches 12.5-16.4 J/cm<2>, and the bending strength reaches 1195-1540 MPa.

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