ABRASION RESISTANT COPPER-BASED SINTER ALLOY

• Main Author: KAWADA HIDEAKI
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a sinter alloy for a valve guide for an engine having higher thermal conductivity than conventional iron-based sinter alloys and higher abrasion resistance than conventional high tensile brass.SOLUTION: There is provided an abrasion resistant sinter copper alloy having whole composition consisting of, by mass ratio, Ni:2.0 to 16.0%, Si:0.2 to 4.0% and the balance Cu with inevitable impurities, a metallic structure consisting of a pore, a base consisting of a copper or copper-nickel alloy and nickel silicide dispersed in the base, and the nickel silicide contains ones with 2 μm or more in size. 【課題】従来の鉄系焼結合金より高い熱伝導性と、従来の高力黄銅より高い耐摩耗性を兼ね備えたエンジン用バルブガイド用の焼結合金を提供する。【解決手段】全体組成が、質量比で、Ｎｉ：２．０〜１６．０％、Ｓｉ：０．２〜４．０％、および残部がＣｕおよび不可避不純物からなり、気孔と、銅もしくは銅−ニッケル合金からなる基地と、基地中に中に分散する粒状のニッケル珪化物とからなる金属組織を呈するとともに、ニッケル珪化物は２μｍ以上の大きさのものを含む耐摩耗性焼結銅合金。【選択図】図１