High-strength high-corrosion-resistant nickel-based high-temperature alloy and solution and aging heat treatment method thereof

A nickel-based superalloy and solution aging technology, applied in the field of nickel-based superalloy, can solve the problems of lack of alloy composition control and performance optimization technology, lack of stable industrial production capacity, etc., and achieve the effect of low material cost

Active Publication Date: 2015-04-22
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the research and production of high-strength and high-corrosion-resistant nickel-based superalloys in China is still in the initial stage of devel

Method used

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  • High-strength high-corrosion-resistant nickel-based high-temperature alloy and solution and aging heat treatment method thereof
  • High-strength high-corrosion-resistant nickel-based high-temperature alloy and solution and aging heat treatment method thereof
  • High-strength high-corrosion-resistant nickel-based high-temperature alloy and solution and aging heat treatment method thereof

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[0039] Example 1

[0040] A new type of high-strength and high-corrosion resistant nickel-based superalloy and its solution and aging heat treatment method, including the following steps:

[0041] Step 1): According to weight percentage, 40% Ni, 21% Cr, 3.25% Mo, 2.25% Cu, 0.3% Al, 2.2% Ti, 0.01% C, 0.5% Mn, 0.01% The Mg and the remainder are Fe, which are added to the vacuum induction furnace for smelting. After vacuum induction smelting and electroslag remelting, an alloy ingot is obtained. The composition is shown in Table 1 for No.1 alloy;

[0042] Step 2): The alloy ingot undergoes homogenization treatment at 1180°C and a holding time of 30 hours in a heat treatment furnace;

[0043] Step 3): After the homogenization treatment, the alloy ingot is held at 1170°C for 1.5 hours and then forged to a billet, and then forged to a square billet through 3 fires, with 50% deformation per fire;

[0044] Step 4): After hot forging, the billet is heated at 1120°C for 1.5 hours and then rolled...

Example Embodiment

[0051] Example 2

[0052] Step 1): According to weight percentage, 44% Ni, 21% Cr, 3.25% Mo, 2.25% Cu, 0.3% Al, 2.3% Ti, 0.01% C, 0.5% Mn, 0.01% The Mg and the remainder are Fe, which are added to the vacuum induction furnace for smelting. After vacuum induction smelting and electroslag remelting, an alloy ingot is obtained. The composition is shown in the No. 2 alloy in Table 1;

[0053] Step 2): The alloy ingot is homogenized in a heat treatment furnace at 1170°C and a holding time of 40 hours;

[0054] Step 3): After homogenization treatment, the alloy ingot is forged at 1160°C for 1.5 hours after holding, and then forged to a square billet through 4 fires, with a deformation of 40% per fire;

[0055] Step 4): After hot forging, the billet is heated at 1130°C for 1.5 hours and then rolled, and then hot-rolled to a bar through one fire, and the deformation of the pass is 40% to make a bar;

[0056] Step 5): The bar obtained in step 3) is kept at 980℃ for 70 minutes in a heat treatmen...

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Abstract

The invention provides a high-strength high-corrosion-resistant nickel-based high-temperature alloy and a solution and aging heat treatment method thereof, and belongs to the technical field of a nickel-based high-temperature alloy. The alloy comprises the following chemical ingredients in percentage by weight: 40.0-44.0 percent of Ni, 19.5-22.5 percent of Cr, 2.5-3.5 percent of Mo, 1.5-3.0 percent of Cu, 0.10-0.50 percent of Al, 1.9-2.4 percent of Ti, less than or equal to 0.03 percent of C, less than or equal to 0.2 percent of Si, less than or equal to 1.0 percent of Mn, less than or equal to 0.02 percent of S, less than or equal to 0.015 percent of P, 0.001-0.005 percent of Mg, and the balance of Fe and inevitable impurities. The precipitates of a strengthening phase in tissues can be more uniform and fine by means of reasonable solution and subsequent aging treatment, the number of precipitated phases which are not beneficial to toughness and corrosion resistance can be remarkably reduced, and the obdurability and corrosion resistance in high-chlorine-ion marine environments and other severe environments of the alloy can be improved. On the basis of not influencing the structural stability, obdurability and corrosion resistance of the alloy, the content of Fe is increased as much as possible so as to improve the hot workability of the alloy and reduce the cost.

Description

technical field [0001] The invention belongs to the technical field of nickel-based superalloys, and in particular relates to a high-strength and high-corrosion-resistant nickel-based superalloy and a solid solution aging heat treatment method thereof, which are suitable for severe corrosion environments such as naval vessels and deep-sea oil and gas exploitation. Background technique [0002] With the development of high-safety and stable ship equipment in the East China Sea and South my country Sea, there is an urgent need to further improve the overall performance of high-power diesel engines, and the use performance of seawater cooling pump shaft materials serving in harsh seawater corrosion environments is also proposed. New and higher requirements have been imposed, not only requiring excellent mechanical properties (high tensile strength and impact resistance), but also good seawater corrosion resistance to withstand large alternating loads and effectively avoid stress ...

Claims

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Application Information

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IPC IPC(8): C22C30/02C22F1/00
Inventor 石照夏颜晓峰段春华赵明汉韩光炜陈霞
Owner CENT IRON & STEEL RES INST
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