Resource-saving high-temperature high-strength heat-resistant alloy steel material

Abstract

The invention discloses a resource-saving high-temperature high-strength heat-resistant alloy steel material. The alloy steel material consists of the following elements in percentage by mass: at least one of 0.25-0.6% of C, 0.5-2% of Si, less than or equal to 2.5% of Mn, less than or equal to 0.03% of P, less than or equal to 0.03% of S, 25-35% of Cr, 7-23% of Ni, 2-6% of W and 2-6% of Mo, 0.15-0.5% of N, 0.05-0.4% of rare earth element Re and the balance of Fe and inevitable impurities, wherein the sum of the mass percents of all the elements is 100%. According to the alloy steel material, alow-cost austenite stabilization element N is used for replacing an expensive element Ni, the Ni content is saved by 50% or above compared with a traditional heat-resisting alloy with the ZG50Cr28Ni48W5 type brand, the production cost is reduced, and the high-temperature mechanical property and the high-temperature endurance property of the alloy steel material are superior to those of the heat-resisting alloy with the ZG50Cr28Ni48W5 type brand.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a resource-saving high-temperature high-strength heat-resistant alloy steel material. Background technique [0002] Heat-resistant alloys are widely used in aerospace, petrochemical, metallurgy, glass building materials and other industries to manufacture important parts that work at high temperatures, and the market volume is huge. Ni is an austenite stabilizing element, which can significantly improve the thermal strength of the material, and is a key element in the manufacture of heat-resistant alloys. Generally, in order to maintain excellent high-temperature performance, the higher the service temperature, the higher the Ni content in the heat-resistant alloy. The traditional heat-resistant alloys ZG50Ni48Cr28W5 and ZG45Ni48Cr28W5Si2, which are mainly used to manufacture heat-resistant parts with a service temperature up to 1150°C, are For example, its N...

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Problems solved by technology

For ZG50Ni48Cr28W5 heat-resistant alloys with a service temperature above 1100 °C, because it occupies more Ni resources, the material cost is higher, and at such a high service temperature, the interaction between N and other alloy elements is more complicated Therefore, the economic and social benefits of developing resource-saving heat-resistant alloys that are stable and in service above 1100 °C are significant, and the research and development is also very difficult

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