METALLURGICAL COMPOSITION OF PARTICULATE MATERIALS, SELF-LUBRICATING SINTERED PRODUCT AND METHOD FOR OBTAINING SELF-LUBRICATING SINTERED PRODUCTS

PROBLEM TO BE SOLVED: To provide a metallurgical composition of composite material formed by a metallic structural matrix and by a non-metallic solid lubricant, in which the metallurgical composition is adequate for the manufacture by means of conforming (densification) and sintering operations of s...

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Main Authors WALDYR RISTON JUNIOR, CRISTIANO BINDER, MOISES LUIZ PARUCKER, ROBERTO BINDER, ALOISIO NELMO KLEIN, GISELE HAMMES
Format Patent
LanguageEnglish
Japanese
Published 09.06.2016
Subjects
ALLOYS
CASTING
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:PROBLEM TO BE SOLVED: To provide a metallurgical composition of composite material formed by a metallic structural matrix and by a non-metallic solid lubricant, in which the metallurgical composition is adequate for the manufacture by means of conforming (densification) and sintering operations of sintered products presenting a low coefficient of friction allied to high mechanical strength and high hardness.SOLUTION: A metallurgical composition comprises: a main particulate metallic material, for example iron or nickel, and at least one alloy element for hardening the main particulate metallic material, which form a structural matrix (10); a particulate solid lubricant (20), such as graphite, hexagonal boron nitride or mixture thereof; and a particulate alloy element which is capable of forming, during the sintering of the composition conformed by compaction or by injection molding, a liquid phase, to agglomerate the solid lubricant (20) in discrete particles. The composition may comprise an alloy component to stabilize the alpha-iron matrix phase, during the sintering, in order to prevent the graphite solid lubricant from being solubilized in the iron.SELECTED DRAWING: Figure 4 【課題】金属構造マトリックスおよび非金属固体潤滑剤によって形成される複合材料の冶金組成物であって、高い機械的強度および高い硬度に結び付けられる低い摩擦係数を提示する焼結体の構造化（緻密化）および焼結作業による製造に適切である冶金組成物を提供する。【解決手段】冶金組成物は、主粒子状金属材料、例えば、鉄またはニッケル、および構造的マトリックス（１０）を形成する主粒子状金属材料を硬化するための、少なくとも１つの合金元素；粒子状固体潤滑剤（２０）、例えば、グラファイト、六方晶窒化ホウ素、またはこれらの混合物；および、圧縮または射出成形によって構造化された組成物を焼結する間に、液相を形成し、別個の粒子中に固体潤滑剤（２０）を凝集させることが可能な粒子状合金元素を含む。組成物は、グラファイト固体潤滑剤が鉄中に溶解するのを防ぐために、焼結中に、アルファ鉄マトリックス相を安定化させる合金成分を含み得る。【選択図】図４
Bibliography:Application Number: JP20150227838