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首页> 外文期刊>ISIJ international >Surface Modification of Ferritic Stainless Steel by Heating in Iron, Graphite and Alumina Powders
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Surface Modification of Ferritic Stainless Steel by Heating in Iron, Graphite and Alumina Powders

机译：铁，石墨和氧化铝粉末加热铁素体不锈钢的表面改变

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摘要

A new surface modification technique, called "iron-powder pack (IPP) treatment", has been proposed. During IPP treatment, carbon and nitrogen diffuse into a metal substrate by treating it with a mixture of iron and carbon powders at high temperature in a nitrogen flow. This paper describes the effects of adding alumina to the mixture of iron and graphite powders on the microstructures and hardness of SUS430 ferritic stainless steel after IPP treatment. The alumina powder was added to prevent powder mixtures from sintering. A 7:3 (volume ratio) mixture of iron and graphite powders was used as a "base powder", and the volume ratio of the alumina powder added to the base powder was varied from 0:1 to 50:1. A steel pipe packed with SUS430 steel and powder was heat-treated at 1 273 K for 3.6 ks in a nitrogen flow and then rapidly cooled in water. A surface-modified layer formed on the SUS430 steel through IPP treatment. When IPP treatment was performed using only the base powder, carbon was detected in the surface-modified layer. Both carbon and nitrogen diffused when alumina was added to the base powder. However, the thickness of the surface-modified layer gradually decreased from 380 to 125 μm with an increase in the amount of alumina. A similar tendency was observed in the surface hardness of the steel. In addition, the effects of subzero treatment and immersion in an aqueous nitric acid solution on the modified steel are discussed.
机译：已经提出了一种新的表面改性技术，称为“铁粉包（IPP）处理”。在IPP处理期间，通过在氮气流动的高温下用铁和碳粉末的混合物将碳和氮气扩散到金属基材中。本文介绍了在IPP处理后加入氧化铝与铁和石墨粉末混合物的效果，在SUS430铁素体不锈钢的微观结构和硬度下。加入氧化铝粉末以防止粉末混合物烧结。使用铁和石墨粉末的7：3（体积比）用作“基础粉末”，加入到基础粉末的氧化铝粉的体积比在0：1至50：1中变化。用SUS430钢和粉末填充的钢管以173k在氮气流动下进行热处理3.6 ks，然后在水中迅速冷却。通过IPP处理在SUS430钢上形成的表面改性层。当仅使用基础粉末进行IPP处理时，在表面改性层中检测碳。将氧化铝加入基础粉末时，碳和氮气都扩散。然而，表面改性层的厚度从380逐渐降低到125μm，随着氧化铝的量增加。在钢的表面硬度中观察到类似的趋势。此外，讨论了亚膦处理和浸渍在改性钢上硝酸水溶液中的效果。

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  • 来源
    《ISIJ international》 |2020年第9期|2044-2050|共7页
  • 作者

    Yasuhiro MORIZONO; Takateru YAMAMURO; Sadahiro TSUREKAWA;

  • 作者单位

    Department of Materials System Engineering National Institute of Technology Kurume College 1-1-1 Komorino Kurume Fukuoka 830-8555 Japan;

    Technical Division Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 Japan;

    Division of Materials Science and Chemistry Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ferritic stainless steel; iron powder; graphite; alumina; carbon; nitrogen; diffusion;

    机译：铁素体不锈钢;铁粉;石墨;氧化铝;碳;氮;扩散;

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