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发明公开
CN107175426A 一种用于大型热锻模具表面强化的自保护药芯丝材及其制备方法 有权 转让

一种用于大型热锻模具表面强化的自保护药芯丝材及其制备方法
摘要：
本发明公开了一种用于大型热锻模具表面强化的自保护药芯丝材及其制备方法，该药芯丝材中药芯的化学成分以质量百分数计，包括铬元素含量26‑30%、钼元素含量8‑10%、钨元素含量1.8‑3%、镍元素含量1.5‑2.5%、硅元素含量0.8‑1.2%、锰元素含量0.6‑1.0%、铌元素含量0.15‑0.3%、碳元素含量1.2‑1.6%、磷元素含量≤0.02%、硫元素含量≤0.02%，余量为钴和杂质。本发明提供了一种用于大型热锻模具表面强化的自保护药芯丝材，可以将药芯丝材在大型热锻模具型腔工作区域的表面上进行堆焊形成表面强化层，使得大型热锻模具的型腔表面层在500~700℃下，载荷在4万吨以上极端工况条件下不容易发生磨损、变形和开裂的情况，使得大型热锻模具的使用寿命提高10倍以上，明显降低了大型锻件的制造成本。
摘要（英）：

The invention discloses a self-protection flux-cored wire for strengthening the surface of a large hot-forging die and a production method of the self-protection flux-cored wire. The flux-cored wire comprises, by mass percentage, 26-30% of chromium, 8-10% of molybdenum, 1.8-3% of tungsten, 1.5-2.5% of nickel, 0.8-1.2% of silicon, 0.6-1.0% of manganese, 0.15-0.3% of niobium, 1.2-1.6% of carbon, not larger than 0.02% of phosphorus, not larger than 0.02% of sulfur and the balance cobalt and impurities. By the adoption of the self-protection flux-cored wire for strengthening the surface of the large hot-forging die, overlaying of the flux-cored wire is conducted on the surface of the working region of a die cavity of the large hot-forging die, the surface strengthened layer is formed, the temperature of the surface layer of the die cavity of the large hot-forging die is below 500-700 DEG C, the wear, deformation and crack are not likely to generate under the extreme working condition that the load is above 40,000 tons, the service life of the large hot-forging die is prolonged by over 10 times, and the manufacturing cost of large forgings is lowered remarkably.

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