超高硬度堆焊材料的硬度及耐磨性
Quantitative study on hardness and wear-resistance of ultra-high hardfacing materials
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摘要: 通过在堆敷合金系统中添加多种强碳化物形成元素,在焊接热循环作用下或随后的回火过程中以弥散碳化物形式析出。弥散碳化物的析出既可以在强化堆敷金属的同时,提高堆敷层抗磨损的能力,又可以降低基体组织中的碳含量,增加基体的韧性。利用上述思想,以C、Cr、Mo、W、V作为基础合金系统,采用二次旋转回归设计方法设计试验方案,建立了超高硬度堆敷金属的硬度、耐磨性与合金元素间的数学模型,并研究了药芯焊丝中合金元素对堆敷金属硬度及耐磨性的定量影响规律。Abstract: Though adding various-strong carbide formotion elements into surfacing alloy system,intergranular precipitation carbide that alloy elements combine with carbon can be formed under following welding thermal cycle or tempering.Those precipitated carbide are not only improving strengthen and increasing wear-resistance ability of surfacing deposited metal,but also enhancing matrix toughness by decreasing carbon content in matrix.Baset on these viewpoints,base alloy system is established with C-Cr-Mo-W-V.Mathematic model on hardness and wear-resistance of ultra-high hardfacing deposited metal with alloying elements is established by quadratic rotary regress optimum design technology,and quantitative influencing rule of alloying element in flux cored wires on surfacing hardness and wear-resistance is also studied.
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Keywords:
- surfacing materials /
- ultra-high hardness /
- wear-resis-rance /
- precipitated carbide
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期刊类型引用(8)
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