高硼中碳合金在低真空环境下的高温磨损行为  

High temperature wear behavior of high-boron middle-carbon alloy steel in low vacuum environment

作　　者：师晓莉[1] 蒋业华[1] 李祖来[1] 李日良[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《材料热处理学报》2015年第2期185-190,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51171073)

摘　　要：研究了在低真空环境下,200~600℃温度区间内高硼中碳合金的高温磨损性能。结果表明:高硼中碳合金在200~500℃温度区间内磨损量随温度提高而线性增大,在600℃时摩擦系数的波动越来越剧烈,摩擦表层金属产生相变而使磨损量增大了一个数量级。低温环境下磨损表现为局部的塑性变形疲劳和氧化磨损,高温环境下摩擦表层软化并形成带状组织,产生更强的塑性流动和氧化磨损,粘着磨损不明显。在600℃时磨损亚表层的共晶硼碳化合物为颗粒状,且磨损亚表层的厚度最厚。Friction-wear properties of high-boron middle-carbon alloy steel at 200-600 ℃ in low vacuum environment were studied. The results show that the mass loss of the worn high-boron middle-carbon alloy steel increases linearly with the increasing of temperature at200-500 ℃. However,the change of friction coefficients become more visible at 600 ℃,and the mass loss of the boron alloy steel increases greatly due to the phase transformation at the wear surface. The local wear fatigue and oxidation wear is the main mechanism at low temperature; and at high temperature,strong plastic flow and oxidation wear are observed due to the decrease of the strength and phase transformation occurring in the surface layer of the wear samples,which leads to the increase of wear mass loss,while the adhesive wear is not obvious. The granular boron carbon compounds are observed in the wear subsurface of the tested sample at 600 ℃,for which the maximum thickness of wear subsurface forms.

关 键 词：高温磨损 低真空 硼碳化合物 

分 类 号：TG131[一般工业技术—材料科学与工程]