High-strength, heat-resistant alloy for exhaust valves with improved overaging-resistance
    12.
    发明公开
    High-strength, heat-resistant alloy for exhaust valves with improved overaging-resistance 审中-公开
    用于排气门的高强度耐热合金具有改进的耐老化

    公开(公告)号:EP1464718A1

    公开(公告)日:2004-10-06

    申请号:EP04006427.1

    申请日:2004-03-17

    IPC分类号: C22C38/00 C22C19/03

    CPC分类号: C22C19/056

    摘要: Disclosed is a heat resistant alloy for exhaust valves, in which Ni-content is constrained to at maximum 62% due to the material cost, while the strength is maintained equal or better to those of conventional alloys and the strength is kept even after use at high temperature for a long period of time. The alloy has the composition essentially consisting of, by weight %, C: 0.01-0.2%, Si: up to 1.0%, Mn: up to 1.0%, P: up to 0.02%, S: up to 0.01%, Ni: 30-62%, Cr: 13-20%, W: 0.01-3.00%, Mo: up to 2.0%, provided that Mo+0.5W: 1.0-2.5%, Al: 0.7% or higher and less than 1.6%, Ti: 1.5-3.0%, Nb: 0.5-1.5%, B: 0.001-0.010%, provided that [%Ti]/[%Al]: 1.6 or more to less than 2.0, and the balance of Fe and inevitable impurities. Optional components are I) at least one of Mg: 0.001-0.030%, Ca: 0.001-0.030% and Zr: 0.001-0.100%, II) Cu: up to 2.0%, and III) V: 0.005-1.00%.

    摘要翻译: 公开的是用于排气门的耐热合金,其中Ni含量在最大62%被约束为由于材料成本,而强度被保持等于或更好地与常规合金,甚至在使用后在强度保持 高温下的长时间。 该合金具有基本上由所述的组合物,以重量%计,C:0.01〜0.2%以下,Si:至多1.0%以下,Mn:最多1.0%,P:至0:02%,S:最多0:01%以下,Ni: 30-62%以下,Cr:13-20%,W:0点01分〜3:00%以下,Mo:至多2.0%以下,Mo + 0.5W提供确实:1.0-2.5%以下,Al:0.7%以上且小于1.6%, 钛:1.5-3.0%以下,Nb:0.5〜1.5%,B:从0001到0010%,形成的做了%TIU / A%ALUE:1.6以上至小于2.0,以及Fe和不可避免的杂质的余额。 任选组分I)Mg中的至少一种:0001-0030%以下,Ca:0001-0030%和Zr:0001-0100%,II)的Cu:最多2.0%,和III)V:0.005-1.00%。