一种M50轴承钢棒材及其制备方法

本发明是关于一种M50轴承钢棒材及其制备方法，主要采用的技术方案为：一种M50轴承钢棒材的制备方法，包括如下步骤：对铸锭进行真空自耗重熔处理制备出自耗锭；其中，所述自耗锭中的单个碳化物的等效直径尺寸小于150μm，在所述自耗锭中：碳化物中的M2C碳化物的含量≥95％；对所述自耗锭进行碳化物高温分解处理，以促使所述自耗锭中的M2C碳化物分解，得到M50轴承钢锭；其中，所述M50轴承钢锭中的单个碳化物的等效直径尺寸不大于50μm；对所述M50轴承钢锭依次进行锻造、轧制处理，得到M50轴承钢棒材。本发明主要用于制备一种碳化物等效直径尺寸≤25μm、孔洞微缺陷≤3 .8微米的M50轴承钢棒材，以满足高速、高温、大载荷苛刻工况条件下长寿命轴承服役性能要求。This invention pertains to an M50 bearing steel bar and a preparation method therefor. The core technical solution is as follows: The preparation method for the M50 bearing steel bar comprises the following steps: Conduct vacuum consumable remelting treatment on the cast ingot to produce a consumable electrode ingot, wherein the equivalent diameter of a single carbide in the consumable electrode ingot is less than 150 μm, and the content of M2C carbide among all carbides in the ingot is ≥95%; Perform high-temperature carbide decomposition treatment on the consumable electrode ingot to promote the decomposition of M2C carbides therein, thereby obtaining an M50 bearing steel ingot, where the equivalent diameter of a single carbide in the M50 bearing steel ingot is no more than 50 μm; Subject the M50 bearing steel ingot to sequential forging and rolling processes to obtain the M50 bearing steel bar. This invention is mainly used to fabricate M50 bearing steel bars with carbide equivalent diameter ≤25 μm and pore micro-defects ≤3.8 μm, so as to meet the service performance requirements of long-life bearings under harsh operating conditions including high speed, high temperature and heavy load.

搜集汇总

背景与挑战

背景概述

该数据集涉及一种M50轴承钢棒材及其制备方法，核心是通过真空自耗重熔、碳化物高温分解、锻造和轧制等步骤，制备出碳化物等效直径≤25μm、孔洞微缺陷≤3.8微米的棒材，旨在满足高速、高温、大载荷苛刻工况下轴承的长寿命服役性能需求。