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Preparation method of UNS N07718 high-temperature alloy

A UNSN07718, superalloy technology, applied in the field of alloys, can solve the problems of difficulty in continuous production of superalloys, unstable comprehensive performance of superalloys, etc., and achieve the effects of stable comprehensive performance, excellent performance and quality assurance

Inactive Publication Date: 2014-03-26
上海丰渠特种合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to overcome the unstable comprehensive performance of the UNS N07718 superalloy in the prior art, and it is difficult to continuously produce high-standard UNS N07718 superalloy defects, and to provide a preparation method for the UNS N07718 superalloy

Method used

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  • Preparation method of UNS N07718 high-temperature alloy
  • Preparation method of UNS N07718 high-temperature alloy
  • Preparation method of UNS N07718 high-temperature alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Preparation method of UNS N07718 superalloy:

[0045] (1) According to the standard composition of UNS N07718 superalloy, the raw materials are mixed, the total amount of raw materials is 2 tons, of which, the set content of Al is 0.5%, and the set content of Ti is 1.0%; the percentage is the mass relative to the total mass of raw materials Percentage; the setting content of other components is detailed in Table 2 below;

[0046] Table 2 Set content of each component except Al and Ti

[0047] components C mn Si P S Mo Cr co Nb Ni B Fe Cu Content (wt%) 0.043 0.35 0.1 0.01 0.001 3.25 17.4 0.052 4.9 50.2 0.0032 margin 0.024

[0048] (2) Add 70wt% raw materials into the steelmaking furnace, melt at 1300 ° C, vacuum process, and add CaO-Al 2 o 3 Refining slag, deoxidation treatment; wherein, the vacuum degree of vacuum treatment reaches 0.2Pa, and a composite deoxidizer composed of 4kg ...

Embodiment 2

[0060] Preparation method of UNS N07718 superalloy:

[0061] (1) According to the standard composition of UNS N07718 superalloy, the raw materials are mixed, the total amount of raw materials is 2 tons, of which, the set content of Al is 0.55%, and the set content of Ti is 1.1%; the percentage is the mass relative to the total mass of raw materials Percentage; The content of other components is detailed in table 5 below;

[0062] Table 5 Set content of each component except Al and Ti

[0063] components C mn Si P S Mo Cr co Nb Ni B Fe Cu Content (wt%) 0.05 0.35 0.1 0.01 0.002 2.9 20 0.06 5.2 53 0.004 margin 0.025

[0064] (2) Add 70wt% raw materials to the steelmaking furnace, melt at 1250°C, vacuum process, and add CaO-Al 2 o 3 Refining slag, deoxidation treatment; among them, the vacuum degree of vacuum treatment reaches 0.5Pa, and a composite deoxidizer composed of 6kg nickel-magnesium...

Embodiment 3

[0073] Preparation method of UNS N07718 superalloy:

[0074] (1) According to the standard composition of UNS N07718 superalloy, the raw materials are mixed, the total amount of raw materials is 2 tons, of which, the set content of Al is 0.45%, and the set content of Ti is 0.95%; the percentage is the mass relative to the total mass of raw materials Percentage; The content of other components is detailed in Table 7 below;

[0075] Table 7 Set content of each component except Al and Ti

[0076] components C mn Si P S Mo Cr co Nb Ni B Fe Cu Content (wt%) 0.06 0.2 0.1 0.01 0.001 3.1 19 0.07 5.2 53 0.004 margin 0.02

[0077] (2) Add 70wt% raw materials to the steelmaking furnace, melt at 1400°C, vacuum process, and add CaO-Al 2 o 3 Refining slag, deoxidation treatment; among them, the vacuum degree of vacuum treatment reaches 0.3Pa, and a composite deoxidizer composed of 5kg nickel-magnesium...

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Abstract

The invention discloses a preparation method of a UNS N07718 high-temperature alloy. The preparation method comprises the following steps: (1) performing raw material burdening according to standard ingredients of the UNS N07718 high-temperature alloy, wherein the set content of Al is 0.4%-0.6% and the set content of Ti is 0.8%-1.15%; (2) melting 70wt% of raw materials, performing vacuum treatment, adding CaO-Al2O3 refining slag, and performing deoxidization treatment; (3) taking the materials to perform ingredient analysis, and supplementing Al and / or Ti according to the situation based on burning loss result; (4) adding the remaining 30wt% of the raw materials, melting down, then deslagging, and refining to obtain molten steel; (5) skimming slag, then taking the materials to perform ingredient analysis, and supplementing Al and / or Ti according to the situation based on the burning loss result; (6) performing deoxidization treatment, stabilizing, tapping and pouring to obtain the UNS N07718 high-temperature alloy. Through the preparation method, the high-quality UNS N07718 high-temperature alloy can be continuously produced, the performances are excellent and stable, and the product quality is ensured.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a preparation method of UNS N07718 superalloy. Background technique [0002] UNS N07718 superalloy is a precipitation-hardening nickel-chromium-iron alloy containing niobium and molybdenum. It has an austenitic structure, and the γ" phase formed by precipitation hardening makes it have excellent comprehensive mechanical properties. From the γ" phase, Ni3Nb(Ti , Al) It can be seen that the content of Al element has a great influence on the aging strengthening effect of UNS N07718 superalloy. The Al content in the UNS N07718 superalloy can fluctuate in the range of 0.2~0.8wt%. However, because elements such as Al are easily burned during the production process, the designed component formula and the actual alloy composition are often very different. . Therefore, the comprehensive performance of this kind of superalloy usually fluctuates greatly, and its mechanical properties are difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52C22C33/04
CPCY02P10/20
Inventor 叶兴良
Owner 上海丰渠特种合金有限公司
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