碳化物形式对多组元铁合金高温摩擦磨损性能的影响

Effect of Carbide Forms on High-Temperature Friction and Wear Properties of Multi-Component Ferroalloys

多组元铁合金耐磨材料主要应用于热轧辊,其磨损失效主要形式为高温钢坯与轧辊的相对运动造成。制备了4种不同成分的多组元铁合金,成分分别为0、1%、3%、5%的Mo,2.6%C、1%Si、5%Mn、7%V以及8%Cr,其余为Fe。使用HT1000高温摩擦磨损试验机在500℃条件下对该合金进行了磨损试验,采用XRD和SEM/EDS对不同Mo含量多组元铁合金中形成的碳化物形貌与种类对其高温磨损性能的影响规律进行了研究。研究表明:通过改变Cr、Mo及V的添加顺序,可控制各合金基体中析出的碳化物的种类和形貌,从而有利于高温耐磨性能的提升。

Multi-component ferroalloy wear-resistant materials are mainly used in hot rolls, where often occur severe wear failure caused by the relative movement of high-temperature billets and rolls. In this experiment, four multi-component ferroalloys with different compositions were prepared. The compositions were set to 0,1%, 3%, 5% Mo, 2.6% C, 1% Si, 5% Mn, 7% V and 8% Cr, the rest is Fe. An HT1000 high-temperature friction wear tester was used to conduct abrasion tests on the alloys at 500℃. XRD and SEM/EDS were used to analyze the influencing law of morphology and types of carbides of the ferroalloys on their high-temperature wear properties. As a result, the types and morphologies of the carbides precipitated in the alloy matrix can be controlled by the addition order of the Cr, Mo and V, thereby contributes to the improvement of high temperature wear resistance.