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Research on Application of High Strength and High Toughness Austempered Spheroidal Graphite Cast Iron to Environmental Material

高强高韧等温淬火球墨铸铁在环保材料中的应用研究

基本信息

批准号：
11650751
负责人：
AOYAMA Masaji
金额：
$ 0.64万
依托单位：
Daido Institute 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：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650751/
关键词：
digital image processing fractal dimension analysis corrosion resistance anodic polarization measurement spheroidal graphite cast iron alloyed spheroidal graphite cast iron austempering environmental material 電気化学的測定アノード分極測定画像処理フラ

项目摘要

This research is in the aim of the development of the austempered spheroidal graphite cast iron which considers high strength, a high toughness, and corrosion resistance.The first research planned the construction of a handy evaluation system from the viewpoint of prevention and the diagnosis of corrosion in the metallic surface. The system analyzes the corrosion distribution, the form, and the progress degree of the metallic surface by using a digital image processing. The second research evaluated the corrosion resistance of the developed material by the electrochemical corrosion test. It was a natural potential measurement and an anodic polarization measurement.The test material prepared the Ni-Cu alloy spheroidal graphite cast iron to expect the corrosion resistance improvement. In addition, the spheroidal graphite cast iron, the high Si content spheroidal graphite cast iron, the white cast iron, and the carbon steel were used as the comparison material. In addition, the effect on various matrixes of the cast iron which showed an excellent property in corrosion resistance was examined in the experiment.The Cu-Ni alloy spheroidal graphite cast iron obstructed the progress of corrosion by the protection film formation of Cu. This material showed the most excellent corrosion resistance. The martensite and the ausferite structure made minute become small no movement maintenance current density, and have improved corrosion resistance.On the other hand, the corrosion evaluation of the metallic surface was able to be analyzed by a digital image processing which used the fractal dimension analysis. The research in the future is to make the objective evaluation judgment standard from the viewpoint of the corrosion prevention and the diagnosis and the evaluation by using a digital image processing.

本研究旨在开发高强度、高韧性、耐腐蚀的等温球墨铸铁。第一项研究从金属表面腐蚀的预防和诊断的角度出发，拟建立一个简便的评价体系。该系统采用数字图像处理技术对金属表面的腐蚀分布、形态和进展程度进行分析。第二部分通过电化学腐蚀试验对所制备材料的耐蚀性进行了评价。这是一种自然电位测量和阳极极化测量。试验材料制备了镍铜合金球墨铸铁，期望其耐蚀性得到提高。此外，还采用球墨铸铁、高硅球墨铸铁、白口铸铁和碳钢作为对比材料。此外，还对具有优良耐蚀性能的铸铁的各种基体进行了试验研究。Cu- ni合金球墨铸铁通过Cu的保护膜的形成阻碍了腐蚀的进行。这种材料表现出最优异的耐腐蚀性。该马氏体和奥氏体组织使微变小无运动维护电流密度，并提高了耐蚀性。另一方面，采用分形维数分析的数字图像处理方法对金属表面的腐蚀评价进行了分析。今后的研究方向是利用数字图像处理技术，从防腐和诊断评价的角度制定客观的评价判断标准。