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Invention Publication
CN105970064A 一种钢结硬质合金及其制备方法 无效 - 驳回

一种钢结硬质合金及其制备方法
Abstract:
本发明公开了一种由10～50%的TiC硬质相和Fe‑Cr‑Mo‑Al‑C粘结相组成的钢结硬质合金，粘结相中各元素占比分别为：C 0.25～0.69%，Cr 0.5～4.5%，Mo 0.5～4.5%，Al 0.25～3.6%，余量为Fe；其制备包括：配料，选取占原料粉末总重10～50%的TiC粉末，余量为C粉、Mo粉、Fe2Al5预合金粉末、Cr‑Fe粉末（其中Cr含量为50～55%）和Fe粉；以下元素分别占原料粉末总重：C 0.25～0.69，Cr 0.5～4.5，Mo 0.5～4.5，Al 0.25～3.6%，余量为Fe；将上述原料粉末湿磨混合、喷雾干燥、压制成型；经1415～1435℃真空液相烧结获得粘结相占总重50%～90%的钢结硬质合金，硬度及断裂韧性都具有改善，主要用于耐磨产品。
Abstract(English):

The invention discloses a steel bonded hard alloy composed of 10-50% of a TiC hard phase and a Fe-Cr-Mo-Al-C binding phase, the binding phase comprises the following elements by proportion: 0.25-0.69% of C, 0.5-4.5% of Cr, 0.5-4.5% of Mo, 0.25-3.6% of Al, and the balance of Fe. The preparation method comprises the following steps: 1) burdening; wherein the TiC powder accounting for 10-50% of gross weight of the raw material powder is selected, and the balance is C powder, Mo powder, Fe2Al5 pre-alloying powder, Cr-Fe powder (wherein Cr content is 50-55%) and Fe powder; C accounts for 0.25-0.69% of gross weight of the raw material powder, Cr accounts for 0.5-4.5% of gross weight of the raw material powder, Mo accounts for 0.5-4.5% of gross weight of the raw material powder, Al accounts for 0.25-3.6% of gross weight of the raw material powder, and the balance is Fe. 2) performing wet milling and mixing, spray drying, and compression moulding on the raw material powder; and 3) performing vacuum liquid-phase sintering on the material at the temperature of 1415-1435 DEG C to obtain the steel bonded hard alloy with the bonding phase accounting for 50-90% of gross weight, hardness and fracture toughness property are improved, and the steel bonded hard alloy is mainly used for wear-resistant products.

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