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首页> 外文期刊>Journal of Iron and Steel Research International >Development of New Wear-Resistant Surface Coating at Elevated Temperature
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Development of New Wear-Resistant Surface Coating at Elevated Temperature

机译：高温下新型耐磨表面涂层的开发

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Because of good oxidation resistance at high temperature and excellent mechanical properties of Ni_3Al and high hot hardness, and good oxidation resistance of chromium carbide, chromium carbide particle reinforced Ni_3Al matrix composite would possess excellent wear resistance at elevated temperature. Cr_3C_2-NiAl-Ni welding wire was produced by pressureless sintering process in vacuum. When the welding wire was welded on the surface of carbon steel, under the action of the physical heat of arc, NiAl reacted with nickel to form Ni_3 Al and carbide particle reinforced Ni_3 Al matrix composite was formed on the welding layers. Cr_3C_2 was dissolved during welding and dispersed Cr_7C_3 was formed, which strengthened the Ni_3Al matrix significantly. The Cr_7C_3-Ni_3Al interface was broadened, and a zone of interdiffusion and a new phase M_(23)C_6 were formed, indicating that a good bond has been formed. The hardness of Cr_7C_3/Ni_3Al composite at room and elevated temperatures is much higher than that of stellite alloys. In addition, Cr_7C_3/Ni_3Al composite possesses better high temperature oxidation resistance than stellite 12 alloy. So Cr_7C_3/Ni_3Al composite can become an attractive potential candidate for elevated temperature wear-resistant surface material.
机译：由于碳化铬颗粒增强的Ni_3Al基复合材料在高温下具有良好的抗氧化性，Ni_3Al的优良机械性能和高的热硬度以及碳化铬的良好的抗氧化性，因此在高温下具有优异的耐磨性。 Cr_3C_2-NiAl-Ni焊丝是通过真空无压烧结工艺生产的。当将焊丝焊接在碳钢表面上时，在电弧物理热的作用下，NiAl与镍反应形成Ni_3Al，并在焊接层上形成了碳化物颗粒增强的Ni_3Al基复合材料。 Cr_3C_2在焊接过程中溶解并形成分散的Cr_7C_3，从而显着强化了Ni_3Al基体。 Cr_7C_3-Ni_3Al界面变宽，形成了互扩散区和新的相M_（23）C_6，表明已形成良好的键合。 Cr_7C_3 / Ni_3Al复合材料在室温和高温下的硬度远高于星状合金。此外，Cr_7C_3 / Ni_3Al复合材料比Stellite 12合金具有更好的高温抗氧化性。因此，Cr_7C_3 / Ni_3Al复合材料可以成为高温耐磨表面材料的诱人潜力候选材料。

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