Frictional heat-induced severe adhesive wear has been limiting the lifetime of metal-to-metal wear systems for many years. Five graphitic white irons were previously designed and produced to introduce flake graphite into white iron, with the goal to expedite heat dissipation and reduce the frictional heat effect. This paper focused on the graphite addition effect on adhesive wear resistance for graphitic white irons and its comparison with abrasive wear. Adhesive wear resistance was assessed with a block on ring apparatus in accordance with ASTM G77. An empirical model was formulated to quantitatively evaluate graphite additions’ effect on the adhesive wear resistance. The model indicated that 1 vol.% graphite addition had the same effect as a hardness increase of 2.66 HRC, which was a 14% higher contribution than previously observed for three-body abrasive wear of the same alloys studied following ASTM G65. The improved wear resistance was related to an increased thermal diffusivity of the composite microstructure, and the surface lubricating effect of graphite.

摩擦热引起的严重粘合剂磨损多年来一直在限制金属对金属磨损系统的寿命。先前设计并生产了五种石墨白铁，以将片状石墨引入白铁中，目的是加快散热并降低摩擦热效应。本文着眼于石墨添加对石墨白铁的粘着剂耐磨性的影响及其与磨料磨损的比较。根据ASTM G77，用环上的砌块装置评估粘合剂的耐磨性。建立了一个经验模型来定量评估石墨添加剂对粘合剂耐磨性的影响。该模型表明，添加1 vol。％的石墨与增加2.66 HRC的硬度具有相同的效果，与先前根据ASTM G65研究的相同合金的三体磨料磨损相比，该结果要高出14％。改善的耐磨性与复合微结构的热扩散率增加以及石墨的表面润滑作用有关。