Fe-Cr-Co-W-Mo martensitic heat resistant steel and method for manufacturing same
A manufacturing method and technology of heat-resistant steel, applied in the field of Fe-Cr-Co-W-Mo martensitic heat-resistant steel, can solve problems such as insufficient research attention, and improve thermal strength, oxidation resistance and corrosion resistance The effect of improving property and high temperature creep strength
Active Publication Date: 2014-07-02
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
Co is an austenite-forming element. When this element is added to heat-resistant steel, it inhibits the formation of δ ferrite and improves the high-temperature strength and high-temperature corrosion resistance of the alloy. However, insufficient attention has been paid to this aspect in the early stage. A report on the research on Fe-Cr-Co-W-Mo heat-resistant steel
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[0016] The present invention will be described in more detail below through specific embodiments, but these embodiments are only exemplary and do not constitute any limitation to the present invention.
[0017] Take the required raw materials, smelt in a vacuum smelting furnace, adjust the content of each element to make its weight percentage as shown in Table 1, and control the content of impurity elements as low as possible.
[0018] Table 1 Chemical composition / wt% of the embodiment of the present invention
[0019]
[0020] The manufacturing processes of Examples 1 to 3 and the mechanical properties of the corresponding examples are shown in Table 2.
[0021] The manufacturing process of table 2 embodiment of the present invention
[0022]
[0023] In order to more specifically illustrate the structure and properties of the heat-resistant steel of the present invention, Example 2-1 is taken as an example to be described in detail.
[0024] Table 3 shows the experim...
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Disclosed are Fe-Cr-Co-W-Mo martensitic heat resistant steel and a method for manufacturing the same. The Fe-Cr-Co-W-Mo martensitic heat resistant steel comprises, by weight, 0.08 to 0.12 of C, 11.0 to 16.0 of Cr, 3.5 to 10.0 of Co, 2.0 to 5.5 of W, 0.3 to 1.5 of Mo, 0.1 to 0.5 of V, 0.03 to 0.15 of Nb, 0.5 to 1.5 of Cu, less than or equal to 1.0 of Si, less than or equal to 1.0 of Mn, 0.04 to 0.06 of N, 0.002 to 0.004 of B and the balance being Fe and inevitable impurities. Technological parameters include that the ingot cogging temperature is 1150 DEG C, the finish forging temperature is more than or equal to 950 DEG C, the rolling starting temperature is 1150 DEG C, and the normalizing temperature ranges from 750 DEG C to 790 DEG C. The Fe-Cr-Co-W-Mo martensitic heat resistant steel has the advantages of good high-temperature strength and oxidation resistance in high temperature gas and steam corrosion environments.
Description
technical field [0001] The invention belongs to the technical field of heat-resistant alloys, and provides a Fe-Cr-Co-W-Mo martensitic heat-resistant steel with excellent high-temperature strength and oxidation resistance in high-temperature gas and steam corrosion environments. Background technique [0002] For many years, the metallurgical and power industries have been committed to the research and development of new heat-resistant steels. Among them, martensitic heat-resistant steels with a Cr content of 9wt%~12wt% have good high temperature creep rupture resistance, high temperature oxidation resistance, Corrosion resistance, low thermal expansion coefficient, high thermal conductivity and relatively low cost have filled the gap of low-alloy steel and austenitic steel, and become an important research and development object in the field of heat-resistant steel. The development of 9wt%~12wt% martensitic heat-resistant steel is mainly along the following two directions. O...
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IPC IPC(8): C22C38/32C21D1/18C21D1/28C21D8/02
Inventor 惠希东王树申常丽
Owner UNIV OF SCI & TECH BEIJING