巻号一覧
62 巻, 8 号
August
選択された号の論文の15件中1～15を表示しています
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総報：平成27年度春季大会（講演特集，企画セッション）
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飴山 惠2015 年 62 巻 8 号 p. 385-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (189K) -
菅野 了次2015 年 62 巻 8 号 p. 386-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (224K) -
三浦 秀士2015 年 62 巻 8 号 p. 387-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (199K) -
近藤 勝義2015 年 62 巻 8 号 p. 388-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (181K) -
山崎 徹2015 年 62 巻 8 号 p. 389-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (238K) -
後藤 孝2015 年 62 巻 8 号 p. 390-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (256K)
研究論文
研究論文
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澤田 俊之2015 年 62 巻 8 号 p. 393-399
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスThe effects of HIP temperature on the properties of Ni-Cr-Mo-B P/M material with Ni-22mass%Cr-26mass%Mo-1.5mass%B composition were investigated. Raw material powders were produced by gas atomization, followed by sieving under 500 μm in particle size. And then, the powders were consolidated by HIP. HIP consolidations were carried out at 1323, 1373 and 1423 K in temperature, at 147 MPa in pressure and for 5 h in holding time. All specimens consisted of γNi matrix and tetragonal M3B2 type complex boride. The complex borides were isolated and coarsened with increase of HIP temperature.
Rockwell hardness decreased and bending strength increased with increasing HIP temperature. The variation in Charpy impact value as a function of HIP temperature showed the local maximum at 1373 K. Wear resistance by Ohgoshi-type abrasion test with low sliding speed improved with increasing HIP temperature. The complex borides in the specimen with low HIP temperature were so fine that these were considered to fall off from the sliding surface in the abrasion test.
As a result of immersion tests, all examined Ni-Cr-Mo-B P/M materials showed higher corrosion resistance against both HCl and HF aqueous solutions than C-276 alloy.抄録全体を表示PDF形式でダウンロード (1847K) -
笠井 実, 藤塚 史隆, 日比野 敦2015 年 62 巻 8 号 p. 400-407
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスIn the fields of an eco-friendly automobile, an advanced industrial machine, and a precision electronic device, controlling of vibration damping behavior of the sintering parts obtained from powder metallurgy is required. In this paper, the vibration behavior of Cu-Sn/Al2O3 composite material made by powder metallurgy was investigated by a FFT analyzer.
Cu, Sn, and Al2O3 powders were used as initial substances. The powders were mixed and pressed into a plate shaped compact with 200 MPa. Using a vacuum furnace, the green compact was sintered at 825-1075 °C for 1 hour. By changing the mixing ratio and the sintering temperature, some kinds of the composite material plates were produced. For the composite material obtained, microstructure observation, Vickers hardness test, compression test and vibration test were performed.
The composite materials were consisted from the crystal grain of 15-69 μm, and the mixed Al2O3 particles were dispersed on the grain boundary. Additionally, twin crystal was also found in the composite materials. The damping coefficient of composite material depended on the mixing ratio of the raw powders and the sintering microstructure. The vibration damping behavior of the Cu-Sn/Al2O3 composite material was affected by solubility element, grain boundary, dispersoid particle, and twin crystal.抄録全体を表示PDF形式でダウンロード (1834K) -
村上 隆幸, 野田 岩男, 池田 潤二, 中平 敦2015 年 62 巻 8 号 p. 408-412
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスGenerally, hydroxyapatite coating on Ti-6Al-4V orthopeadic implant is performed by the high temperature process such as for example plasma spraying or flame spraying. The chemical state of the vanadium at the boundary of Ti-6Al-4V substrate and hydroxyapatite coating layer sprayed by flame spraying was investigated. The adhesive strength between coating and substrate were measured, and the interface was investigated by scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX). X-ray diffraction (XRD) and X-ray absorption near edge structure (XANES) spectrum show that the diffusion of vanadium element and titanium element was not detected at the interface between hydroxyapatite and Ti-6Al-4V substrate, and the existence of the new reaction phase was not also detected. It is suggested that vanadium exists in Ti-6Al-4V alloy.抄録全体を表示PDF形式でダウンロード (827K)
特集：自動車の変化に対応した焼結材料の新たな展開
総報
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筒井 唯之2015 年 62 巻 8 号 p. 414-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (225K)
受賞記念講演
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林 哲也, 徳岡 輝和, 天野 暢也2015 年 62 巻 8 号 p. 415-421
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスThe powder metallurgy process can achieve producing products with high-performance materials, and also it enables the product to have a high standard of dimensional precision compared to the Ingot metallurgy process. Therefore, sintered component products have been adopted for many automotive parts, and the number of these cases predicted to soar year after year. This paper shows two topics regarding the development and productization of advanced powder metallurgy products.
One of the topics is about the aluminum-based high-performance alloy using rapid solidification aluminum alloy powders. Main features of this material are high strength, wear and abrasion resistance, and heat resistance. This material is used for the cylinder liner of motorcycle engines.
The other topic is about the warm sizing technology, which is able to complete sizing process and attain high precision simultaneously by hardening a material while pressing in a die. This technology is applied for the parts of the high performance oil pump.抄録全体を表示PDF形式でダウンロード (1015K)
研究論文
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岩岡 拓, 尾﨑 由紀子, 藤木 章2015 年 62 巻 8 号 p. 422-430
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスIn powder compaction, the ejection characteristics of green compact held in the die affect friction between the green compact side and die wall. The ejection characteristics are important factors for final formability of green compact. Therefore, this research studied factors that affect ejection friction. For ejection friction factors, we sought to measure lateral pressure that acts on the die wall, from compacting until ejection. We found that an increase in ejection friction coefficient does not necessarily increase ejection pressure. This phenomena was caused by lubricant that the compact supplies to the wall. By defining concrete material coefficient for powder, ejection characteristics have been explained. We found that powders with simpler shapes and/or lower yield strengths have superior ejection characteristics.抄録全体を表示PDF形式でダウンロード (1175K) -
佐野 陽平, 長田 稔子, 工藤 健太郎, 津守 不二夫, 三浦 秀士, 田家 真紀子, 田中 茂雄2015 年 62 巻 8 号 p. 431-436
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスIn recent years, the soft magnetic material parts have been widely used in the fields of industrial equipments, consumer electronics, automobiles, and so on. To fabricate these soft magnetic material parts, electrical steel and P/M method is normaly used. With the increase of fabricating complex shaped parts, processing method with more flexibility in design also be needed. For this reason, MIM process is hoped to be a near-net-shape, cost reduction and mass production method which can fabricate three-dimensional complex shaped parts. Fe-Cr-based soft magnetic material is developed in 1960s~1970s to be used in corrosive environments. Because it is less expensive than the PB permalloy. Mainly composition comprising a 13 %Cr or higher is used to make material stable. However, the maximum magnetic flux density of material decreases with increase of Cr content. In this research, the effect of Cr content on the magnetic properties under DC and AC magnetic field were investigated by mixing SUS430L alloy powder and iron powder.抄録全体を表示PDF形式でダウンロード (983K)
本会記事
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2015 年 62 巻 8 号 p. Pref8_1-
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (182K) -
2015 年 62 巻 8 号 p. Mtg8_2-Mtg8_6
発行日: 2015/08/15
公開日: 2015/08/26
ジャーナル オープンアクセスPDF形式でダウンロード (380K)
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