摘要 本文在综合分析了金属基镶嵌固体润滑轴承在冶金等行业使用中基体耐磨性、固体润滑性等情况。 就进一步强化镶嵌轴承金属基体表面强度，以提高其耐磨性进行实验研究等。 本文以金属基镶嵌固体润滑轴承的基体材料 H85黄铜为例，实验研究多道次小变形轧制工艺对 H85黄铜表面强化的 影响的可行性和影响规律等。 即选用二种原始厚度分别为4 mm和12.9 mm的 H85黄铜，进行再结晶完全退火，之后通过130 mm冷轧机进行总压下变形一定的单道次和多道次轧制试验。 同时结合金相分析、显微硬度分析等技术，对比分析不同原始厚度的 H85黄铜在垂直冷轧方向和平行冷轧方向截面的边部和中部的晶粒尺寸变化、显微硬度变化等。实验研究分析结果表明，采用多道次小变形冷轧工艺， 可以有效实现金属基镶嵌固体润滑轴承的基体金属 H85黄铜的表层塑性变形、细化晶粒、提高表层硬度， 从而增强基体金属表层的耐磨性； 基体金属材料的中间层保留一定的退火组织，保持一定的塑性和韧性。 这种多道次小变形冷轧工艺可以实现金属基镶嵌固体润滑轴承的基体金属厚度上的梯度组织分布结构， 为提高镶嵌轴承的金属基体材料表面耐磨性和强韧性具有一定的实际意义。 同时，对比有限元模拟计算，进一步证实多道次小变形冷轧工艺强化基体金属表层的有效性。

关键词：金属基镶嵌轴承、H85黄铜、多道次、小变形、表层强化

Abstract In this paper, the wear resistance and solid lubrication of metal base inlaid solid lubrication bearings in metallurgical industry are analyzed comprehensively. The surface strength of the metal matrix of the inlaid bearing is further strengthened to improve its wear resistance. This paper takes the matrix material H85 brass of metallic base inlaid solid lubrication bearing as an example, and studies the feasibility and influence law of the influence of multi-channel small deformation rolling technology on the surface reinforcement of H85 brass. That is, two kinds of H85 brass with original thickness of 4mm and 12.9 mm were selected for crystallization and complete annealing, and a certain number of single and multiple cold rolling tests under total pressure were performed on a 130mm cold rolling machine. At the same time, alloy phase analysis and microhardness analysis techniques were used to compare and analyze the grain size changes and microhardness changes of H85 brass with different original thickness at the edges and middle sections of vertical cold rolling direction and parallel cold rolling direction. The experimental results show that the multi-channel small deformation cold rolling process can be used. The experimental results show that grain refinement and surface hardness of metal H85 brass can be effectively realized by the multi-channel small deformation cold rolling process, thus enhancing the wear resistance of metal surface. The middle layer of the matrix metal material retains a certain amount of annealing tissue and maintains a certain degree of plasticity and toughness. This multi-channel small deformation cold rolling process can realize the gradient structure on the metal thickness of the matrix of the metal base inlaid solid lubrication bearings. It has a certain practical significance to improve the wear resistance and toughness of the metal matrix materials of the inlaid bearings. At the same time, compared with the finite element simulation calculation, the effectiveness of the multi-channel small deformation cold rolling process to strengthen the metal surface of the matrix is further confirmed.

Key words: Metal base inlaid bearings, H85 brass, multiple times, small deformation, surface reinforcement

目录

绪论 5

1 课题背景和意义 5

1.1 课题背景 5

1.2 国内外研究现状 5

1.3 发展趋势 6

1.3.1 发展趋势 6