论文部分内容阅读
在过共析钢的淬火组织中,有关残余碳化物的尺寸与分散度以及马氏体的固溶成份与均匀性对轴承、工具、模具等使用性能的影响问题,已为人们所重视。由于上列因素均与淬火前预备组织中的碳化物形态及其分散度密切相关,故为充分发挥高碳钢强韧性的潜力,近年来以GCr15钢为代表,开展碳化物细化工艺的试验研究,其实际意义是不言而喻的。 为了消除GCr15钢中未溶碳化物对细化的不良影响以及避免由于碳化物细化而导致切削性能的恶化,本文通过高温固溶化淬火预处理,在保证适当的切削硬度前提下,研究了碳化物细化工艺,并在相应的最终热处理条件下,探讨了碳化物粒度对接触疲劳等
In the hypereutectoid steel quenching organization, the size and dispersion of residual carbides and martensite solid solution composition and uniformity of bearings, tools, molds and other use of performance issues, has been valued. As the above factors are closely related to the carbide morphology and dispersion in the pre-quenched microstructure, in order to give full play to the potential of the toughness of high-carbon steel, the GCr15 steel, as the representative, has been used to test the carbide refining process Research, its practical significance is self-evident. In order to eliminate the adverse effect of undissolved carbides on the refining of GCr15 steel and avoid the deterioration of cutting performance due to the carbide refinement, this paper studied the effect of carbonization by high-temperature solutionizing quenching pretreatment under the premise of ensuring proper cutting hardness Material refinement process, and the corresponding final heat treatment conditions, discussed the carbide particle size on contact fatigue