High-aluminum Inconel 625 alloy and preparation method thereof

An alloy and high-alumina technology, which is applied in the field of preparation of high-aluminum Inconel625 alloy, can solve the problems of poor corrosion resistance and strong corrosion resistance of chloride molten salt, and achieve the effects of simplifying production equipment, reducing Cr content, and low energy consumption

Pending Publication Date: 2022-08-02
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chloride molten salt is extremely corrosive to heat storage and heat transfer system pipes, and existing structural materials have poor corrosion resistance to chloride molten salt at high temperatures

Method used

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  • High-aluminum Inconel 625 alloy and preparation method thereof
  • High-aluminum Inconel 625 alloy and preparation method thereof
  • High-aluminum Inconel 625 alloy and preparation method thereof

Examples

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preparation example Construction

[0015] The high-aluminum Inconel 625 alloy preparation method of the present invention comprises the following steps:

[0016] Step (1) weigh the reaction material according to a preset ratio, and place the reaction material in a planetary ball mill for ball milling;

[0017] Step (2) pressing the ball-milled reaction material on a press into a cake-shaped blank with a diameter of 80 mm and a height of about 50 mm;

[0018] Step (3) put the cake-shaped blank into the reaction kettle, put the igniter on the blank, fill with protective gas for washing, then fill with protective gas to keep the pressure, and continue to heat up until the self-propagating reaction occurs in the system to obtain base metal alloy;

[0019] Step (4) vacuum induction secondary smelting is performed on the base metal alloy to obtain an ingot;

[0020] Step (5) The ingot is solution-treated at 1150° C. for 30 minutes, and water-cooled.

[0021] For the preparation method described above, the paramete...

Embodiment 1

[0029] The aluminothermic method prepares the initial casting billet, and its preparation steps are:

[0030] Table 1 Example 1 High-aluminum Inconel 625 alloy reaction material ratio (wt.%)

[0031]

[0032] (1) Ingredients: Weigh 1kg of reaction raw materials according to the ratio of reaction materials shown in Table 1, and each raw material is evenly divided into four parts and mixed evenly;

[0033] (2) Ball milling: Put the mixed reaction materials into the QM-ISP4 planetary ball mill for ball milling, the speed is 80 r / min, and the ball milling time is 8 hours. Note that the direction of the ball mill is changed every 2 hours to prevent agglomeration. for Al 2 O 3 , the ratio of ball to material is 1:2;

[0034] (3) Preparation by aluminothermic method: After the ball milling, the reaction material was put into the mold, and a pressure of 70 MPa was applied with a hydraulic press. After the pressure was maintained for 4 minutes, the material was pressed into a dia...

Embodiment 2

[0040] The reaction materials of this example are shown in Table 2, and the preparation steps are the same as in Example 1. The test results of mechanical properties at room temperature are: hardness 445.0 HV0.3, tensile strength 1011.64 MPa, and elongation 2.68%.

[0041] Table 2 Example 2 High-aluminum Inconel 625 alloy reaction material ratio (wt.%)

[0042]

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Abstract

The high-aluminum Inconel 625 alloy comprises the following components in percentage by mass: 13 to 5 percent of Cr, 5 percent of Fe, 4.15 percent of Nb, 10 percent of Mo, 5 to 9 percent of Al and the balance of Ni. The preparation method comprises the following steps: (1) weighing reaction materials according to a preset proportion, and putting the reaction materials into a planetary ball mill for ball milling; (2) pressing the ball-milled reaction material into a cake-shaped blank with the diameter of 80 mm and the height of about 50 mm on a press machine; (3) putting the cake-shaped blank into a reaction kettle, putting an ignition agent on a blank body, filling protective gas for gas washing, then filling the protective gas for pressure maintaining, and continuously heating until a self-propagating reaction occurs in a system, so as to obtain a base metal alloy; (4) the base metal alloy is subjected to vacuum induction secondary smelting, and a cast ingot is obtained; and (5) the cast ingot is subjected to solution treatment for 30 min at the temperature of 1150 DEG C, and water cooling is conducted.

Description

technical field [0001] The invention relates to the preparation technology of high-aluminum Inconel 625 alloy. Background technique [0002] Molten-salt CSP (Concentrated solar power, CSP) technology can not only provide electricity efficiently, but also significantly reduce CO2 on a global scale 2 Emissions, as one of the most competitive alternatives to fossil fuels, is receiving increasing attention. Chloride molten salts have been proposed as heat transfer fluids (HTF) and thermal energy storage (TES) in next-generation CSP power plants due to their low cost, low melting point, high boiling point, and good heat transfer performance. candidate dielectric materials. However, chloride molten salt is extremely corrosive to heat storage and heat transfer system pipes, and existing structural materials have poor corrosion resistance to chloride molten salt at high temperatures. Therefore, it is of great significance to develop new alloys for service in high-temperature chlo...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C1/04C22C1/03C22F1/10B22F3/23
CPCC22C19/057C22C19/056C22C1/0433C22C1/023C22C1/03C22F1/10C22F1/002B22F3/23Y02P10/25C22C19/03C22C1/02C22C30/00C22C19/055C22C19/05
Inventor 喇培清杜明宸金静杨鹏辉盛捷余海存高云滕杜琳琳柏泽民
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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