复合合金化制备烧结硬化PM钢

IF 0.3 Q4 THERMODYNAMICS
S. Geroldinger, R. Oro Calderon, C. Gierl-Mayer, H. Danninger
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引用次数: 5

摘要

在粉末冶金中,为了调节合金元素的含量,有几种方法将合金元素引入粉末冶金材料中。每种合金化路线都有其优点和缺点。主合金(MA),通常含有几种合金元素的高含量粉末,可以少量添加到基粉中,特别是引入氧敏感元素,如Cr, Mn和Si。此外,可以设计中间合金,在烧结过程中中间形成液相,以改善合金元素在材料中的分布,加速均匀化。在本研究中,将这种中间合金与预合金基粉结合形成杂化合金混合物,以提高材料的烧结淬透性。并与母合金和普通铁的混合物进行了对比。通过生成13种不同冷却速率下记录的CCT图来确定所有材料的烧结淬透性。这是通过在3和1.5 K/s的普通冷却速率下处理的样品的金相截面以及随后的显微硬度(HV 0.1)和表观硬度(HV 30)的硬度测量来验证的。◼
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sinter Hardening PM Steels Prepared through Hybrid Alloying
Abstract In powder metallurgy (PM), there are several ways of introducing alloying elements into a PM material in order to adjust a certain alloying element content. Each alloying route has its advantages and disadvantages. Master alloys (MA), powders with a high content of typically several alloying elements, can be added in small amounts to a base powder, especially to introduce oxygen sensitive elements such as Cr, Mn, and Si. In addition, the master alloy can be designed in such a way that a liquid phase is formed intermediately during the sintering process to improve the distribution of alloying elements in the material and to accelerate homogenization. In this study, such master alloys were combined with pre-alloyed base powders to form hybrid alloyed mixtures with the aim of improving the material‘s sinter hardenability. The hybrid alloys were compared with mixtures of master alloy and plain Fe as reference material. The sinter hardenability of all materials was determined by generating CCT diagrams recorded with 13 different cooling rates. These were verified by metallographic cross-sections of specimens treated at common cooling rates of 3 and 1.5 K/s and subsequent hardness measurements of the microhardness (HV 0.1) of the microstructural constituents and the apparent hardness (HV 30). ◼
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
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