成果報告書詳細
管理番号20160000000644
タイトル*平成27年度中間年報 SIP(戦略的イノベーション創造プログラム)/革新的設計生産技術 市場流通材のスーパーメタル化開発
公開日2016/8/5
報告書年度2015 - 2015
委託先名国立大学法人長岡技術科学大学
プロジェクト番号P14030
部署名IoT推進部
和文要約
英文要約Title:SIP (Cross-Ministerial Strategic Innovation Promotion Program) / Innovative Design/Manufacturing Technologies Development of super metals by processing of metallic raw materials (FY2014-FY2018) FY2015 Annual Report

Current sulphonitriding of tool steels were carried out to understand current process and the properties of the sulphonitrided zone. The pin-on-disk friction test at room temperature reveals that the die steels with the sulphonitrided surface has lower friction coefficient than bare and nitrided die steels. With respect to hammer forging tests with a Cr-Mo steel, the formation of the transfer particles was not observed in the forging with a sulphonitrided die. Several dies to fabricate connecting-rods were used in real forging process for investigating wear behaviour. The evaluation method to determine amount of die for the forging die was determined.
We have investigated a corrosion resistive stainless steel prepared by nitriding heat treatment. We combined the simulated thermal and flow analysis of the furnace and corrosion currents of the treated samples. It is found that a low temperature position makes the current large, and a high temperature place the current small. Next, a PEFC operation system has been reconstructed and the power generation has been tested for a single cell which has the nitriding a couple of steel separators. Finally, a pilot furnace has been constructed to conduct the nitriding at various conditions.
Plating process and condition was investigated using “on-Demand plating bath” equipped on the manufacturing sites. The hardness of plated films increased from ca. 230Hv to ca. 500Hv by addition of amino acids in the plating bath. Sufficient corrosion resistance was also confirmed in the plated film. Irregularity in film thickness more than 10 times that of average thickness was found in the projection part of the plating piece from cross-sectional observation by electron microscope. The shielding apparatus in order to reduce such irregularity in the thickness was designed and fabricated using 3D printer system.
Polysaccharide was used as dispersant to disperse carbon nanotubes(CNTs) composite plating solution. Dispersion effect was characterized by measuring the absorbance value of the suspension. We examined the relationship between the volume percentage of polysaccharide and absorbance value of suspension. The results indicated that polysaccharide could disperse CNTs suspension effectively. When the optimum amount of polysaccharide was added into the suspension, the experiments showed that it had dispersion good stability. And using the obtained CNTs dispersion was subjected to plating treatment. The deposited composite plating film, it was confirmed that CNTs are eutectoid. The results of the evaluation of the sliding properties of the CNTs composite plating film, the friction coefficient of 35% less than Ni-P, the value indicated 0.05. Further, it was found that it improved the wear resistance.
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