摘要:
Use of an iron-chromium-alumium alloy with long service life and minor changes in heat resistance as a foil for heating elements, the foil having a thickness ranging from 0.020 to 0.300 m. The alloy contains (in percentages by weight) 4.5-6.5% Al and 16-24% Cr, to which are added 0.05-0.7% Si, 0.001-0.5% Mn, 0.02-0.1% Y, 0.02-0.1% Zr, 0.02-0.1% Hf, 0.003-0.020% C, maximum 0.03% N, maximum 0.01% S and maximum 0.5% Cu, the remainder being iron and the usual impurities resulting from the melting process.
摘要:
The present disclosure relates to a ferritic chromium stainless steel with the following composition in percent by weight: C max 0,1, Si 0,1 - 1, Mn max 0,6, Cr 20 - 25, Ni max 2, Mo 0,5 - 2, Nb 0,3 - 1,5, Ti max 0,5, Zr max 0,5, REM max 0,3, Al max 0,1, N max 0,07 balance Fe and normally occurring impurities, and wherein the content of Zr+Ti is at least 0,2 %. The ferritic chromium stainless steel is suitable for use in fuel cells, especially Solid Oxide Fuel Cells.
摘要翻译:本发明涉及一种铁素体铬不锈钢,其重量百分比如下:C max 0,1,Si 0,1-1,Mn max 0.6,Cr 20-25,Ni max 2,Mo 0, 5 - 2,Nb 0,3 - 1,5,Ti最大0.5,Zr最大0.5,REM最大0.3,Al最大0,1,N最大0.07平衡Fe和正常发生的杂质,以及 其中Zr + Ti的含量为至少0.2%。 铁素体铬不锈钢适用于燃料电池,特别是固体氧化物燃料电池。
摘要:
A metallic tube for heating a medium or subject outside thereof or inside it by transfer of heat energy through walls of the tube, in which heat is absorbed or emitted at least to a substantial degree by radiation on one or both of the inner and outer surfaces of the tube, is of a material forming a layer of essentially AI2O3 on the surfaces thereof when heated to at least approximately 75O0C. At least one of the external and the internal surface of the tube is coated by one of a metal, metal alloy and metal compound, which after oxidation forms a layer having an emissivity coefficient exceeding 0.7, or by a layer essentially consisting of a metal oxide which has an emissivity coefficient exceeding 0.7.
摘要翻译:一种金属管,用于通过将热能转移到管的壁中来加热介质或受试者的外部或内部,其中热量通过辐射至少在一个或两个内表面和外表面上被吸收或发射至少相当程度 的管,当被加热到至少大约750℃时,是在其表面上形成基本上Al 2 O 3层的材料。 管的外表面和内表面中的至少一个被金属,金属合金和金属化合物之一涂覆,氧化后形成发射系数超过0.7的层,或者由基本上由金属氧化物组成的层 其发射系数超过0.7。
摘要:
A method of producing an FeCrAl material by gas atomisation, wherein in addition to containing iron (Fe), chromium (Cr) and aluminium (Al) the material also contains minor fractions of one or more of the materials molybdenum (Mo), hafnium (Hf), zirconium (Zr), yttrium (Y), nitrogen (N), carbon (C) and oxygen (O). The invention is characterised by causing the smelt to be atomised to contain 0.05-0.50 percent by weight tantalum (Ta) and, at the same time, less than 0.10 percent by weight titanium (Ti). According to one highly preferred embodiment, nitrogen gas (N2) is used as an atomising gas to which a given amount of oxygen gas (O2) is added, said amount of oxygen gas being such as to cause the atomised powder to contain 0.02-0.10 percent by weight oxygen (0) at the same time as the nitrogen content of the powder is 0.01-0.06 percent by weight. The invention also relates to a high temperature material.
摘要:
A wear-resistant steel product which comprises, in mass %, 0.05 to 0.40 % of C, 0.1 to 0.8 % of Si, 0.5 to 2.0 % of Mn, 0.005 to 0.5 % of Ti, 0.0005 to 0.005 % of B, 0.005 to 0.10 % of Al, and 0.005 % or less of N, and has martensite structure and a spreading degree of old austenitic grain of 2 or more, which degree is represented by the ratio (dL/dZ) of the old austenitic grain diameter in the direction of thickness (dL) to the old austenitic grain diameter in the direction of milling (dZ) in the steel product.
摘要:
The invention relates to a ferritic, oxidation-resistant iron-chrome-aluminium-yttrium-hafnium alloy for thin films and wires. Said alloy has an improved life-span and a reduced oxidation speed at high temperatures, a high hot-drawing resistance and a high specific electric resistance. The alloy has the following composition (in percent by mass): Cr: 16-22, A1: 6-10, Si: 0.02-1.0, Mn: max. 0.5, Hf: 0.02-0.1, Y: 0.02-0.1, Mg: max. 0.1, Ti: max. 0.02, Zr: max. 0.09, SE: max. 0.02, Sr: max. 0.1, Ca: max: 0.1, Cu: max. 0.5 V: max. 0.1 Ta: max. 0.1, Nb: max. 0.1,C: max. 0.03, N: max. 0.01, B: max. 0.01, The residue consists of iron and impurities caused by the melting process.
摘要:
The invention concerns a method for casting thin ferritic stainless steel strips less than 10 mm thick directly from liquid metal between twin cooled rotating rolls with parallel horizontal axes. The invention is characterised in that: said ferritic stainless steel contains (in weight percentages) 11 to 18 % of chromium, less than 1 % of manganese, less than 1 % of silicon, less than 2.5 % of molybdenum; said ferritic stainless steel having carbon and nitrogen contents whereof the total does not exceed 0.05 %; said ferritic stainless steel contains at least one of the stabilising elements among titanium, niobium, zirconium, aluminium, and the total of their contents ranging between 0.05 and 1 %; the other elements present are iron and the usual impurities resulting from the process. The invention also concerns the strips obtainable by said method.
摘要:
A ferritic heat resisting steel capable of attaining an improvement of the strength and HAZ softening resistance of a material, the omission of an after-welding heat treatment, and a decrease in a power plant construction cost. The ferritic heat resisting steel contains 0.0l-0.06 % of C, 0.02-0.80 % of Si, 0.20-l.50 % of Mn, 0.50-3.00 % of Cr, 0.0l-l.50 % of Mo, 0.0l-3.50 % of W, 0.02-l.00 % of V, 0.0l-0.50 % of Nb, 0.00l-0.06 % of N, 0.0003-0.008 % of B, 0.00l-0.5 % of Ti and 0.00l-0.5 % of Zr, or one or a combination of 0.l-2.0 % of Cu, 0.l-2.0 % of Ni and 0.l-2.0 % of Co, the contents of P, S and O being limited to not more than 0.030 %, not more than 0.0l0 % and not more than 0.020 % respectively, a weight ratio of TiN to BN being l-l00 in terms of value of (TiN+ZrN %)/(BN %), an average particle diameter of BN being not more than l mu m.
摘要:
본 발명의 일 실시형태는 중량%로, C: 0.06~0.12%, Si: 0.004~0.4%, Mn: 0.8~2.0%, Al: 0.01~0.05%, Cr: 0.05~1.0%, Mo: 0.001~0.3%, P: 0.001~0.05%, S: 0.001~0.005%, N: 0.001~0.01%, Nb: 0.001~0.05%, Ti: 0.001~0.05%, B: 0.001~0.005%, 잔부 Fe 및 기타 불가피한 불순물을 포함하고, 하기 관계식 1을 만족하며, 면적%로, 오스테나이트: 5~15%, 오토템퍼드 마르텐사이트: 80% 이상, 잔부 베이나이트 및 페라이트 중 1종 이상을 포함하는 미세조직을 갖는 열연강판을 제공한다. [관계식 1] (10[C]+[Si]+2.5[Mn])/(1.5[Cr]+2.0[Mo]-3.2[Nb]) ≤ 20