Creation of precipitation hardened surface ceramics layer aiming to develop innovative steels with high wear resistance

创建沉淀硬化表面陶瓷层，旨在开发具有高耐磨性的创新钢

• 批准号: 24656397
• 负责人: MIYAMOTO Goro
• 金额: $ 2.41万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656397/
• 关键词: 鉄鋼材料; 表面硬化処理; ナノ析出; 析出強化; 窒化; 化合物層; 微細析出

In order to create surface ceramics layer hardened by nano-sized precipitate, pure Fe and Fe-M binary alloys containing small amount of nitride forming elements were gaseous nitrided and crystal structure, growth rate and hardness of surface layer wereinvestigated. Nano-indentation measurements revealed that hardness of γ' layer on the surface of pure Fe is much higher than those in ferrite matrix beneath γ'. On the other hand, hardness of ferrite after nitriding treatment is significantly increased by the addition of Cr, V or Al, while alloying effect on hardness of compound layer is relatively small. Those results imply that precipitation hardening by nano-sized nitrides is not so effective to harden the compound layer.

为了获得纳米析出物强化的表面陶瓷层，对纯Fe和含有少量氮化物形成元素的Fe-M二元合金进行了气体氮化处理，并对表面层的晶体结构、生长速率和硬度进行了研究。纳米压痕测试表明，纯铁表面γ'层的硬度远高于γ'层下铁素体基体的硬度。Cr、V或Al的加入显著提高了氮化处理后铁素体的硬度，而合金化对化合物层硬度的影响相对较小。这些结果意味着通过纳米尺寸的氮化物的沉淀硬化对于硬化化合物层不是那么有效。

项目成果

Formation of nano-sized cluster and nitride during nitriding of ferrous alloys

铁合金氮化过程中纳米簇和氮化物的形成

• 发表时间: 2012
• 期刊: Proc. Int. Symp. Steel Science
• 作者: Goro Miyamoto;Tadashi Furuhara
• 通讯作者: Tadashi Furuhara

Alloying effects on formation of compound layer in the gaseous nitrided Fe-M binary alloys

合金化对气态氮化Fe-M二元合金中化合物层形成的影响

• 发表时间: 2012
• 作者: Goro Miyamoto;Tadashi Furuhara;孟凡輝,宮本吾郎,古原忠
• 通讯作者: 孟凡輝,宮本吾郎,古原忠