HIGH-SPEED STEEL

To provide a high-speed steel capable of obtaining without going through a complicated process and having excellent toughness.SOLUTION: A high-speed steel includes in mass%, C of 0.50-0.80%, Si of 0.01-1.0%, Mn of 0.01-1.0%, Cr of 1.0-16.0%, Mo of 2.0-8.0%, W of 0.10-1.0%, V of 0.10-2.0%, Nb of 0.10...

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Bibliographische Detailangaben
Hauptverfasser:	MIURA KODAI, SAWADA TOSHIYUKI, YAMAMOTO TAKAHISA, OCHI RYOSUKE
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	To provide a high-speed steel capable of obtaining without going through a complicated process and having excellent toughness.SOLUTION: A high-speed steel includes in mass%, C of 0.50-0.80%, Si of 0.01-1.0%, Mn of 0.01-1.0%, Cr of 1.0-16.0%, Mo of 2.0-8.0%, W of 0.10-1.0%, V of 0.10-2.0%, Nb of 0.10-1.0%, and the balance of Fe with inevitable impurities. The high-speed steel satisfies following mathematical expressions (I) and (II): 4.3≤Cr/C≤20 ... (I); and 5.0≤(Mo+0.5W+V+0.5Nb)/C≤9.0 ... (II). In the steel, number density ND of a carbide in which an equivalent circle diameter thereof is 0.1 μm or more and 1.0 μm or less is 0.015 piece/μm2 or more and 0.15 piece/μm2 or less.SELECTED DRAWING: None 【課題】複雑な工程を経ることなく得られ、かつ靱性に優れた高速度鋼の提供。【解決手段】高速度鋼は、Ｃ：０．５０質量％以上０．８０質量％以下Ｓｉ：０．０１質量％以上１．０質量％以下Ｍｎ：０．０１質量％以上１．０質量％以下Ｃｒ：１．０質量％以上１６．０質量％以下Ｍｏ：２．０質量％以上８．０質量％以下Ｗ：０．１０質量％以上１．０質量％以下Ｖ：０．１０質量％以上２．０質量％以下及びＮｂ：０．１０質量％以上１．０質量％以下を含む。残部は、Ｆｅ及び不可避的である。この高速度鋼は、下記数式（Ｉ）及び（II）を満たす。円相当径が０．１μｍ以上１．０μｍ以下である炭化物の数密度ＮＤは、０．０１５個／μｍ２以上０．１５個／μｍ２以下である。４．３ ≦ Ｃｒ／Ｃ ≦ ２０（Ｉ）５．０ ≦ （Ｍｏ＋０．５Ｗ＋Ｖ＋０．５Ｎｂ）／Ｃ ≦ ９．０（II）【選択図】なし