RESEARCH AND DEVELOPMENT OF HEAT AND WEAR RESISTANT MATERIALS

耐热耐磨材料研发

• 批准号: 09650817
• 负责人: MATSUBARA Yasuhiro
• 金额: $ 2.18万
• 依托单位: KURUME NATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650817/
• 关键词: Heat resistance; Oxidation resistance; Abrasion wear resistance; Solidification structure; Solidification process; MィイD27ィエD2CィイD23ィエD2; NiィイD27ィエD2Al; Fe-Ni-Cr-C alloy; Ni-Cr-Al-C alloy; Ni-Cr-C合金; 高温硬さ; 耐熱・耐摩耗合金; (Fc,Ni)-Cr-C合金; Cr_7C_3炭化物

The purpose of this research project is to research and develop the new cast alloys combining heat resistance with abrasion wear resistance on the basis of richness in studies and experience for abrasion wear resistant high Cr cast irons (Fe-Cr-C alloy) and that of knowledge for super alloys. In order to improve the heat resistance of Fe-Cr-C alloy, Fe in the alloy was displaced by Ni in 25%, 50%, 70% of the total mass percent and in 100% of Fe. Then, solidification structure, solidification process and high temperature characteristics were investigated on both the respective alloys of Fe-Ni-Cr-C and Ni-Cr-C systems.According to X-ray diffraction and EDS analysis, the precipitated phases that supported the wear resistance were found to be MィイD27ィエD2CィイD23ィエD2 or CrィイD27ィエD2CィイD23ィエD2 carbides. In the matrix, austenite (γ) was stabilized with an increase in Ni content. As Ni content increased up to 50% at any Cr levels, the eutectic C content was moved to a low C side and, in more Ni co … More ntent than 50%, it was shifted conversely to a high C side. Precipitation of graphite due to Ni addition was suppressed by designing the alloy combination of Cr and C. The softening of matrix due to the increase of γwas compensated by addition of Al that formed a NiィイD23ィエD2Al intermetallic compound and mostly dissolved into matrix. It is expected that these results can lead the improvement of strength and wear resistance of the alloys.The solidification of the Fe-Ni-Cr-C alloy was as follows, L→ primary γ→ (γ+MィイD27ィエD2CィイD23ィエD2) eutectic in the hypo-eutectic composition and L → primary MィイD27ィエD2CィイD23ィエD2 → (γ+ MィイD27ィエD2CィイD23ィエD2) eutectic in the hyper-eutectic composition.The oxidation resistance of the Fe-Ni-Cr-C alloy, as a high temperature or a heat resistant characteristics, was largest in a eutectic alloy, followed by hyper-eutectic alloy, and smallest in a hypo-eutectic alloy. Under the same Ni content, the oxidation resistance was greatly improved as Cr content increase up to 30%.From above research results, the practical application of this alloy at elevated temperatures is considered to be possible under the adequate circumstances. Less

本课题的目的是在丰富的耐磨高铬铸铁（Fe-Cr-C合金）研究和经验以及高温合金知识的基础上，研究开发兼具耐热性和耐磨性的新型铸造合金。为了提高Fe-Cr-C合金的耐热性，合金中的Fe被总质量百分比25%、50%、70%和100%的Ni取代。然后，对Fe-Ni-Cr-C和Ni-Cr-C系合金的凝固组织、凝固过程和高温特性进行了研究。根据X射线衍射和EDS分析，发现支持耐磨性的析出相为MィイD27ィエD2CィイD23ィエD2或CrィイD27ィエD2CィイD23ィエD2碳化物。在基体中，奥氏体（γ）随着Ni含量的增加而稳定。当任何Cr含量下Ni含量增加到50%时，共晶C含量向低C侧移动，而当Ni含量超过50%时，共晶C含量则相反向高C侧移动。通过设计Cr和C的合金组合，抑制了由于Ni的添加而产生的石墨析出。由于γ的增加而导致的基体软化通过添加Al来补偿，Al形成NiiiD23iiD2Al金属间化合物，并且大部分溶解到基体中。 Fe-Ni-Cr-C合金的凝固过程如下：亚共晶成分中L→初生γ→(γ+MィイD27ィエD2CィイD23ィエD2)共晶，L→初生MィイD27ィエD2CィイD23ィエD2 → (γ+ MィイD27ィエD2CィイD23ィエD2)过共晶成分中的共晶。Fe-Ni-Cr-C合金的抗氧化性作为高温或耐热特性，在共晶合金中最大，其次是过共晶合金，在亚共晶合金中最小。在相同的Ni含量下，当Cr含量增加到30%时，其抗氧化性能得到了很大的提高。从上述研究结果来看，在条件允许的情况下，该合金在高温下的实际应用被认为是可能的。较少的

项目成果

松原安宏(他): "耐熱・耐摩耗合金の凝固組織"日本鋳造工学会誌. 133. 33 (1998)

Yasuhiro Matsubara（等）：“耐热耐磨合金的凝固结构”日本铸造工程学会杂志 133. 33（1998）。

Yasuhiro Matsubara, Kiyoshi Nanjo and Nobuya Sasaguri: "Solidification Structure of Heat and Wear Resistant alloy"Reports of the 133th JFS Meeting. 33 (1998)

Yasuhiro Matsubara、Kiyoshi Nanjo 和 Nobuya Sasaguri：“耐热耐磨合金的凝固结构”第 133 届 JFS 会议的报告。

松原 安宏: "耐熱・耐摩耗合金の凝固組織" 鋳造工学(第133回講演概要集). 33 (1998)

Yasuhiro Matsubara：“耐热耐磨合金的凝固结构”铸造工程（第133期讲座摘要）33（1998）。