摘要:
A heat resisting alloy of Fe--Cr--Ni type for exhaust valves, knit meshes for the catalyzer and the like which is low in price and excellent in high temperature properties, which consists essentially by weight percentage of C:0.01.about.0.10%, S:.ltoreq.2.0%, Mn .ltoreq.2.0%, Cr:14.about.18%, Nb+Ta:0.5.about.1.5%, Ti:2.0.about.3.0%, Al:0.8.about.1.5%, Ni:30.about.35%,B:0.001.about.0.01%, Ca+Mg:0.001.about.0.01%,Cu.ltoreq.0.5%, P.ltoreq.0.02%, S.ltoreq.0.01%, O.ltoreq.0.01%, N.ltoreq.0.01%, and the balance of Fe, additionally the total atomic percentage of Al, Ti, Nb and Ta:5.0.about.7.0%, and atomic percentage ratio of Ti/Al:1.0.about.1.5, and M-value calculated from the following equation .ltoreq.0.95; M=�0.717 Ni(at. %)+0.858 Fe(at. %)+1.142 Cr(at. %)+1.90 Al(at. %)+2.271 Ti(at. %)+2.117 Nb(at. %)+2.224 Ta(at. %)+1.001 Mn(at. %)+1.90 Si(at. %)!/100.
摘要:
A titanium alloy having improved heat resistance in addition to the inherent properties of lightness and corrosion resistance. The alloy consists essentially of, by weight %, Al: 5.0-7.0%, Sn: 3.0-5.0%, Zr: 2.5-6.0%, Mo: 2.0-4.0%, Si: 0.05-0.80%, C: 0.001-0.200%, O: 0.05-0.20%, optionally further one or two of Nb and Ta: 0.3-2.0%, and the balance of Ti and inevitable impurities. A method of producing parts from this alloy comprises subjecting the titanium alloy of the above described alloy composition to heat treatment at a temperature of &bgr;-region, combination of rapid cooling and slow cooling or combination of water quenching and annealing, hot processing in &agr;+&bgr; region, solution treatment and aging treatment.
摘要:
A turbine rotor consisting of a wheel made of a TiAl alloy of good heat resistance and a rotor shaft made of a steel with good bonding strength is disclosed. As the shaft material a structural steel or a martensitic heat resistant steel is used. A TiAl turbine wheel made by precision casting is butted to the shaft with insertion of a brazing filler in the butted interfaces and stress of 0.01 kgf/mm.sup.2 or higher but lower than yield stress of the shaft is applied on the butted interfaces under heating by high frequency induction heating in atmosphere of an inert gas or a reducing gas to a temperature higher than the liquidus temperature of the brazing metal but not exceeding 100.degree. C. above the liquidus temperature. Turbine rotors with good accordance of the axes of the wheel and the shaft will be obtained by fitting a projection (or recess) and a recess (or projection) formed at the base of the wheel and the end of the shaft concentrically to the outer shape thereof, and by brazing the ring-shaped area outside the fitted parts.
摘要:
Disclosed is a method of manufacturing a diesel engine valve for intake and exhaust having good corrosion resistance and increased valve face strength, and therefore, of improved durability. A Ni-base heat resistant alloy of strong precipitation hardening type or an Fe-base heat resistant alloy of the same type is used as the material. The method comprises hot forging to prepare a blank form of the valve to be manufactured, solution treatment, cold processing to form the face part, and age-treating for increasing the hardness of the face part.
摘要:
A heat resisting steel consists essentially of 0.005-0.20% of C, 0.01-2.0% of Si, 0.1-2.0% of Mn, 20-30% of Ni, 10-20% of Cr, 3.0-4.5% of Ti and 0.1-0.7% of Al with the ratio Ti/Al being 5-20, and the balance being substantially Fe, which is excellent in the tensile properties at the room temperature and 700.degree. C., and the creep rupture properties at the temperature of 700.degree. C.
摘要翻译:耐热钢主要由C,0.01〜2.0%的Si,0.1〜2.0%的Mn,20〜30%的Ni,10〜20%的Cr,3.0〜4.5%的Ti和0.1〜 -0.7%的Al / Ti比率为5-20,余量基本上为Fe,其室温和700℃的拉伸性能优异,在700℃时的蠕变断裂性能 DEG C.
摘要:
A titanium alloy having improved heat resistance in addition to the inherent properties of lightness and corrosion resistance. The alloy consists essentially of, by weight %, Al: 5.0-7.0%, Sn: 3.0-5.0%, Zr: 2.5-6.0%, Mo: 2.0-4.0%, Si: 0.05-0.80%, C: 0.001-0.200%, O: 0.05-0.20%, optionally further one or two of Nb and Ta: 0.3-2.0%, and the balance of Ti and inevitable impurities. A method of producing parts from this alloy comprises subjecting the titanium alloy of the above described alloy composition to heat treatment at a temperature of .beta.-region, combination of rapid cooling and slow cooling or combination of water quenching and annealing, hot processing in .alpha.+.beta. region, solution treatment and aging treatment.
摘要:
A low thermal expansion Ni-base superalloy contains, by weight % (hereinafter the same as long as not particularly defined) C: 0.15% or less; Si: 1% or less; Mn: 1% or less; Cr: 5 to 20%; at least one of Mo, W and Re of Mo+½(W+Re) of 17 (exclusive) to 25%; Al: 0.2 to 2%; Ti: 0.5 to 4.5%; Fe of 10% or less; at least one of B: 0.02% and Zr: 0.2% or less; a remainder of Ni and inevitable impurities; wherein the atomic % of Al+Ti is 2.5 to 7.0.
摘要:
A high corrosion resisting alloy for use in inlet and exhaust valves of diesel engines which is low in cost and excellent in corrosion resistance and strength, which consists by weight percentage of C.ltoreq.0.1%, Si.ltoreq.1.0%, Mn.ltoreq.1.0%, 25%
摘要:
A method for producing an exhaust valve is described, comprising subjecting a raw material of a specified heat resisting alloy to solid solution treatment; forming a head portion of the exhaust valve from the solution treated raw material through cold working or warm working; joining a stem portion made of martensitic heat resisting steel to said head portion of the exhaust valve; and subjecting the head portion and the stem portion joined with each other to aging treatment.
摘要:
A martensitic heat resisting steel having improved heat resistance, which consists by weight percentage of 0.35%.ltoreq.C.ltoreq.0.60%, 1.0%.ltoreq.Si.ltoreq.2.5%, 0.1%.ltoreq.Mn