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    • 8. 发明申请
    • Ferritic Stainless steel material for automobile exhaust gas passage components
    • 铁素体不锈钢材料用于汽车废气通道部件
    • US20090120536A1
    • 2009-05-14
    • US12292072
    • 2008-11-12
    • Takeo TomitaKazunari ImakawaSadayuki NakamuraManabu Oku
    • Takeo TomitaKazunari ImakawaSadayuki NakamuraManabu Oku
    • C22C38/18
    • C22C38/20C22C38/04C22C38/22C22C38/24C22C38/26F01N2530/04
    • To provide a ferritic stainless steel material for automobile exhaust gas passage components usable in a high-temperature range over 900° C. and even over 950° C. The ferritic stainless steel material has excellent heat resistance and low-temperature toughness and has a composition comprising, in terms of % by mass, at most 0.03% of C, at most 1% of Si, from 0.6 to 2% of Mn, at most 3% of Ni, from 10 to 25% of Cr, from 0.3 to 0.7% of Nb, from more than 1 to 2% of Cu, from 1 to 2.5% of Mo, from 1 to 2.5% of W, at most 0.15% of Al, from 0.03 to 0.2% of V, and at most 0.03% of N, and optionally containing any of B, Co, W, Ti, Zr, REM and Ca with a balance of Fe and inevitable impurities, and the composition satisfies restrictive formulae 1.2Nb+5Mo+6Cu≧11.5 and 15Nb+2Mo+0.5Cu≧10.5. The steel material has a texture where the total amount of Nb and Mo existing as a precipitation phase is at most 0.2% by mass.
    • 提供一种铁素体不锈钢材料,用于在900℃以上甚至950℃以上的高温范围内使用的汽车废气通道部件。铁素体系不锈钢材料具有优异的耐热性和低温韧性, 包括以质量%计,最多0.03%C,至多1%Si,0.6%至2%的Mn,至多3%的Ni,10至25%的Cr,0.3至0.7 Nb的1%〜2%,Mo为1〜2.5%,W为1〜2.5%,Al最多为0.15%,V 3为0.03〜0.2%,最高为0.03% 的N,并且任选地含有余量为Fe和不可避免的杂质的B,Co,W,Ti,Zr,REM和Ca中的任一种,并且该组成满足限制式1.2Nb + 5Mo + 6Cu> = 11.5和15Nb + 2Mo + 0.5Cu> = 10.5。 该钢材具有作为沉淀相存在的Nb和Mo的总量为0.2质量%以下的结构。
    • 10. 发明授权
    • Steel for cold forging having good machinability and the method of
making the same
    • 具有良好机加工性的冷锻钢及其制造方法
    • US4326886A
    • 1982-04-27
    • US130529
    • 1980-03-14
    • Shozo AbeyamaMakoto SaitoAtsuyoshi KimuraSadayuki Nakamura
    • Shozo AbeyamaMakoto SaitoAtsuyoshi KimuraSadayuki Nakamura
    • C21C7/00C22C33/04C22C38/00C22C38/04C22C38/60
    • C22C38/00C22C38/04
    • A steel for cold forging containing C up to 0.6%, Si up to 0.5%, Mn up to 2.0%, S 0.003 to 0.04% and Te up to 0.03%, wherein ratio %Te/%S being at least 0.04, and further, Al up to 0.04%, N up to 0.02% and O up to 0.0030%, and the balance being substantially Fe exhibits both good formability in cold forging and good machinability.The steel may further contain one or more of additional alloying elements selected from the group of Ni, Cr and Mo, the group of V, Nb, Ti, B and Zr, and the group of Pb, Se, Bi and Ca.The steel for cold forging having good machinability is made preferably by agitating molten steel containing adjusted amounts of the alloying elements other than Te, and, if used, members of the Pb group, by introducing non-oxidizing gas thereinto so as to float up and separate large sized particles of non-metallic inclusions, and subsequently adding predetermined amount of Te and other elements.
    • 用于冷锻钢,含C至0.6%,Si至多0.5%,Mn至2.0%,S 0.003至0.04%,Te至0.03%,其中Te /%S的比率至少为0.04,进一步 ,Al高达0.04%,N高达0.02%,O高达0.0030%,余量基本上为Fe,在冷锻中具有良好的成形性和良好的机械加工性。 钢可以进一步含有选自Ni,Cr和Mo,V,Nb,Ti,B和Zr组以及Pb,Se,Bi和Ca组中的一种或多种另外的合金元素。 优选通过搅拌含有调节量的Te以外的合金元素的钢水,并且如果使用的话,则通过将非氧化性气体引入以浮起,并且 单独的大尺寸的非金属夹杂物颗粒,然后添加预定量的Te等元素。