钒对Cr5系堆焊熔敷金属高温磨损性能的影响

Influence of Content of Vanadium on High-Temperature Wear Property of Cr5 Series Hardfacing Deposited Metal

采用Cr5堆焊合金体系,在其它成分基本保持不变的基础上,研究钒含量对堆焊熔敷金属高温力学性能的影响。结果表明:由于钒在堆焊熔敷金属中存在状态不同,所以钒对常温盖面硬度和微观硬度的影响规律并不相同;且在600℃下,随钒含量的增加,耐磨性能先增强,到0.30%时达到最高后开始下降,到0.60%时将耐磨性最差。钒含量在0～0.60%时,随钒含量的增加,摩擦系数逐渐减少;钒含量超过0.60%时,随钒含量的增加,摩擦系数增加。高温磨损与堆焊材料的韧性、强度、组织及抗氧化性密切相关,受诸多因素综合影响。

The influence of vanadium content on high-temperature mechanical properties of hardfacing deposited metal was investigated,on the basis of keeping other compositions of Cr5 Series hardfacing alloy system unchanged.The results show that vanadium has different existing statuses in the hardfacing deposited metal,and different influence laws on room-temperature hardness and micro-hardness.At 600℃,with the increasing of vanadium content,wear resistance is improved firstly,and then started to decreased when the maximum value reschis to at 0.30%,until to the lowest wear resistance at 0.60%.When the vanadium content is within 0～0.60%,with the increasing of vanadium content,the friction coefficient decreases gradually; when it exceeds 0.60%,with the increasing of vanadium content,the coefficient increases.High-temperature wear depends on the toughness,strength,microstructure and oxidation resistance of hardfacing material greatly,and is influenced by many factors comprehensively.