Search Results 1-20 of 25

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  • Influence of dezincification on characteristics of brass sintered alloy  [in Japanese]

    Aicha Masanori , Sato Tomohiro , Takuma Masanori , Saitoh Ken-ichi , Takahashi Yoshimasa

    … <p>Due to the development of powder metallurgy technology in recent years the demand for powder metallurgy products is increasing. … Sintered brass alloys are attracting attention because brass materials are inexpensive and have excellent mechanical properties among them. … However, during the sintering process of brass, zinc as the main component evaporated. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), S1110304, 2018

    J-STAGE 

  • Microstructure and Mechanical Properties of Cu40%Zn-0.5%Cr Alloy by Powder Metallurgy

    Imai Hisashi , Li Shufeng , Kondoh Katsuyoshi [他]

    Materials transactions 55(3), 528-533, 2014-03

  • Microstructure and Mechanical Properties of Cu–40%Zn–0.5%Cr Alloy by Powder Metallurgy

    Imai Hisashi , Li Shufeng , Kondoh Katsuyoshi , Kosaka Yoshiharu , Okada Takuya , Yamamoto Koji , Takahashi Motoi , Umeda Junko

    … In this study, the microstructure and mechanical properties of Cu–40Zn brass alloy with 0.5 mass% Cr additives produced by powder metallurgy (P/M) process were investigated. … Cu–40Zn–0.5Cr and Cu–40Zn brass powders were made by water-atomization process, and used as raw materials. …

    MATERIALS TRANSACTIONS 55(3), 528-533, 2014

    J-STAGE 

  • Preparation of Lead-Free Machinable Brass dispersed MnS by Hot Extrusion of Machined Chips  [in Japanese]

    佐藤 直樹 , 竹田 諒佑 , 西本 明生 [他] , 丸山 徹

    … The most popular recycle process of brass machined chips wastes is remelting process. … The development of lead-free alloy has become an important issue since lead is harmful to the human body. … In this study, MnS was applied to a substitutional material of lead to improve machinability and a direct consolidation process from machined chips of 60/40 brass has been developed. …

    銅と銅合金 : 銅及び銅合金技術研究会誌 = Copper and copper alloy : journal of Japan Research Institute for Advanced Copper-Base Materials and Technologies 53(1), 150-155, 2014

    IR 

  • High Strength and Lead-free Machinable Brass Alloy : Effect of Alloy Elements on Microstructure and Mechanical Properties of P/M High Strength Brass Alloy  [in Japanese]

    今井 久志 , 李 樹豊 , 上坂 美治 [他]

    粉体および粉末冶金 : 粉体粉末冶金協会誌 60(11), 453-459, 2013-11

  • High Strength and Lead-free Machinable Brass Alloy:– Effect of Alloy Elements on Microstructure and Mechanical Properties of P/M High Strength Brass Alloy  [in Japanese]

    IMAI Hisashi , LI Shunfeng , KOSAKA Yoshiharu , KONDOH Katsuyoshi

    … ABSTRACT<BR>In this study, the effects of additive alloying elements on microstructure and mechanical properties of Cu – 40 % Zn alloy prepared by powder metallurgy (P/M) process were investigated. … Raw Cu – 40Zn – Cr – Ti – Fe – Sn brass powders, having a single beta phase, were made by water-atomization process. … Grain size of brass powder was smaller with increasing the solid solution of alloying elements. …

    Journal of the Japan Society of Powder and Powder Metallurgy 60(11), 453-459, 2013

    J-STAGE 

  • Microstructure and Mechanical Properties of Cu-40%Zn-0.5%Cr Alloy by Powder Metallurgy  [in Japanese]

    IMAI Hisashi , LI Shufeng , KONDOH Katsuyoshi , KOSAKA Yoshiharu , OKADA Takuya , YAMAMOTO Koji , TAKAHASHI Motoi , UMEDA Junko

    … In this study, microstructure and mechanical properties of Cu-40Zn brass alloy with 0.5 mass% Cr additive produced by powder metallurgy (P/M) were investigated.Cu-40Zn-0.5Cr and Cu-40Zn brass powder were made by water-atomization process, and used as raw materials. … These powder compacts were consolidated by hot extrusion at various temperatures. …

    Journal of the Japan Society of Powder and Powder Metallurgy 59(11), 645-651, 2012-11-15

    J-STAGE  References (16)

  • Development of Diamond Saw Wire using Pb-free Solder as Fixing Material and Its Application to Slicing of Sapphire Ingot  [in Japanese]

    INOUE Makoto , OHTANI Yasuhiko , SHIMADA Hideaki , TOMIYOSHI Tsutomu , INOUE Hiroaki , MURATA Yasunori , YOKOTA Masaru , NAKAHIRA Atsushi

    … We produced the diamond saw wire using the commercial lead-free solder as a fixing material of diamond abrasive particles, and sliced sapphire ingots into wafers with the saw wires.<BR>The co-drawn brass coated piano wire was adopted as a core material. …

    Journal of the Japan Society of Powder and Powder Metallurgy 59(5), 227-232, 2012-05-15

    J-STAGE  References (8)

  • Development of a New Type Saw Wire Fixed Diamond Abrasive Grains with Solder and Ni Electroplating and its Application to Slicing of Sapphire Ingots  [in Japanese]

    Inoue Makoto , Kawagishi Satoshi , Hagihara Yasuhito , Tomiyoshi Tsutomu , Inoue Hiroaki , Murata Yasunori , Yokota Masaru , Nakahira Atsushi

    … That is, in the first layer, electroless Ni-P alloy plated diamond abrasive grains were temporarily fixed on the brass coated piano wire by using solder. …

    Journal of the Japan Society of Powder and Powder Metallurgy 59(8), 465-472, 2012

    J-STAGE 

  • G040063 Microstructural and Mechanical Properties of the Extruded ot-ii Duplex Phase Brass with Elemental Mg  [in Japanese]

    ATSUMI Haruhiko , IMAI Hisashi , LI Shufeng , KONDOH Katsuyoshi , KOUSAKA Yoshiharu , KOJIMA Akimichi

    … Microstructural and mechanical properties of the extruded a-13 duplex phase brass alloy with elemental Mg powder were investigated in this present study. … Pre-mixed Cu-40Zn powder with 1.0 mass% pure Mg powder (Cu-40Zn+1.0Mg) were mixed and consolidated by spark plasma sintering (SPS). …

    The Proceedings of Mechanical Engineering Congress, Japan 2011(0), _G040063-1-_G040063-5, 2011

    J-STAGE 

  • Development of Lead-Free Machinable Brass with Bismuth and Graphite Particles by Powder Metallurgy Process

    IMAI Hisashi , LI Shufeng , ATSUMI Haruhiko , KOSAKA Yoshiharu , KOJIMA Akimichi , KONDOH Katsuyoshi

    … The aim of this paper was to produce a lead-free machinable brass dispersed with bismuth and graphite particles by powder metallurgy process. … The Cu-40 mass%Zn (Cu-40Zn) brass powder with 0∼3.23 mass% bismuth additions were produced by rapid solidification process, having a mean particle size of 150 μm. …

    MATERIALS TRANSACTIONS 51(5), 855-859, 2010-05-01

    J-STAGE  References (20)

  • Development of free-cutting brass without Pb by hot extrusion  [in Japanese]

    中畑 憲一郎 , 遠藤 康利 , 吉川 嘉宥 [他] , 西本 明生 , 赤松 勝也

    … A direct consolidation of brass machined chips wastes has been attempted from a viewpoint of energy-saving and recyclability. … So a free-cutting brass without Pb has been developed using this consolidation process in our laboratory by adding graphite powder and Cu2S powder as a substitution for Pb. …

    Copper and copper alloy 49(1), 254-257, 2010

    IR 

  • Mechanical Properties and Machinability of Extruded Cu-40%Zn Brass Alloys with Bismuth via Powder Metallurgy Process

    Imai Hisashi , Li shufeng , Atsumi Haruhiko , Kosaka Yoshiharu , Kojima Akimichi , Umeda Junko , Kondoh Katsuyoshi

    … In this paper, the uniform distribution process of bismuth particles in Cu-40Zn brass alloy by powder metallurgy (P/M) and machinable lead-free P/M brass with bismuth are described. … Cu-40Zn Brass with bismuth powders produced by the rapid solidification processing were used as raw materials, having mean particle sizes of 150 μm. …

    Transactions of JWRI 38(1), 25-30, 2009-09

    IR 

  • S0401-1-2 Drilling machinability and mechanical characteristics of P/M brass alloys with bismuth  [in Japanese]

    Imai Hisashi , Kosaka Yoshiharu , Kojima Akimichi , Kondoh Katsuyoshi

    … In this paper, the uniform distribution process of bismuth particles in Cu-40Zn brass alloy by powder metallurgy (P/M) and machinable lead-free P/M brass with bismuth were described. … Cu-40Zn Brass with bismuth powders produced by the rapid solidification processing were used as raw materials, having mean particle sizes of 150 μm. …

    The proceedings of the JSME annual meeting 2009.1(0), 263-264, 2009

    J-STAGE 

  • Characteristics of Lead-Free P/M Cu60-Zn40 Brass Alloys with Graphite

    Imai Hisashi , Kondoh Katsuyoshi , Katano Gen , Kosaka Yoshiharu , Kojima Akimichi , イマイ ヒサシ , コンドウ カツヨシ , カタノ ゲン , コサカ ヨシハル , コジマ アキミチ

    Brass alloys are widely used as industrial materials because of their excellent characteristics such as high corrosion resistance, non-magnetism, and good machinability. … In particular, machinable brass is obtained by adding lead. …

    Transactions of JWRI 37(1), 51-55, 2008-07

    IR 

  • 1405 Characteristics of machinable lead-free P/M brass alloys with graphite  [in Japanese]

    Imai Hisashi , Kondoh Katsuyoshi , Kosaka Yoshiharu , Kojima Akimichi

    Brass is widely used as industrial material because of its excellent characteristics such as high corrosion resistance, nonmagnetic, and good machinability. … In particular, the machinable brass is obtained by adding lead. … In this paper, the uniform distribution process of graphite particles into the brass alloy by powder metallurgy (P/M), and machinable lead-free P/M brass with graphite additives have been developed. …

    The proceedings of the JSME annual meeting 2008.1(0), 217-218, 2008

    J-STAGE 

  • 1402 Microstructure observation and characteristics of hot extruded P/M Brass alloys additive small amount of transition metal  [in Japanese]

    Katano Gen , Kondoh Katsuyoshi , Imai Hisashi , Kosaka Yoshiharu , Kojima Akimichi

    … In this study, the evaluation of mechanical properties and microstructures has been carried out on powder metallurgy 60Cu-40Zn alloys with a small amount of transition metals such as chromium and manganese. … Raw alloy powder was made by water-atomization process, and consolidated by hot extrusion. … In particular 20% increase of TS was recognized compared to the conventional 60Cu-40Zn brass P/M alloy with no additive. …

    The proceedings of the JSME annual meeting 2008.1(0), 211-212, 2008

    J-STAGE 

  • CuproBraze--Method and Applications

    Falkeno Anders

    Copper and copper alloy 42(1), 285-288, 2003

  • Barrel Polishing with Alumina-Composite Botanical Abrasives -1. Polishing of Metallic Materials-  [in Japanese]

    TAKEUCHI Shigeo

    … The alumina-composite abrasive was prepared by mixing walnut shell with alumina powder, aliphatic acid, mineral oil, surfactant, and water. … 7 kinds of metals were used: aluminum, copper, brass, aluminum alloy, duralumin, stainless steel, and titanium alloy. …

    Journal of The Surface Finishing Society of Japan 48(1), 82-86, 1997-01-01

    J-STAGE  References (4)

  • Types of Chip Formation in Machining of Several Metals at Various Cutting Speeds:Experimental Study on Chip Formation Phenomena (1st Report)  [in Japanese]

    TAGUCHI Mitsuo , YOKOYAMA Kazuo , SHIRAISHI Masaichi

    … Orthogonal cutting of eight kinds of the work materials including cast irons, steels and copper alloy was experimentally photographed at the cutting speeds ranging from 10 mm/min to 200 m/min, in order to organize systematic knowledge on the formation, separation and the final shape of the chip. … Various steels and the brass show similar tendency of chip formation whereas cast irons behave differently. …

    Journal of the Japan Society of Precision Engineering 41(485), 552-558, 1975

    J-STAGE 

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