Nickel-based alloy ultra-thin plate

A technology for nickel-based alloys and plates, applied in the field of ultra-fine-grained nickel-based alloy ultra-thin plates and their preparation, can solve problems such as difficulty in large-scale industrial application, and achieve strong rolling capacity, easy control of plate shape, and reduced rolling. effect of stress

Active Publication Date: 2020-07-14
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of nickel-based alloys, researchers have used high-pressure torsion, equal-channel extrusion, and cutting to refine the gra

Method used

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  • Nickel-based alloy ultra-thin plate

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Experimental program
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Effect test

Embodiment 1

[0045] An ultra-fine-grained nickel-based alloy ultra-thin plate and a preparation method thereof, the specific operation steps are as follows:

[0046] (1) Alloy smelting: alloy composition mass percentage composition: Fe 30%, Cr 20%, Al 1.3%, Ti 1.2%, Nb 0.5%, W 0.8%, V 0.5%, Mn 0.5%, Mo 0.2%, N 0.04 %, the rest is Ni and unavoidable impurities. According to the above alloy ingredients, it is smelted by vacuum induction (VIM) and electroslag remelting (ESR), and cast into a billet at a casting temperature of 1550°C to 1600°C.

[0047] (2) Homogenization treatment

[0048] The billet ingot was homogenized and heat-treated at 1200°C for 12 hours to eliminate coarse dendrites and alloy element segregation as much as possible, and at the same time dissolve the second phase precipitated during solidification and cooling into the face-centered cubic matrix to obtain Deformed single-phase face-centered cubic alloys to obtain homogeneous wood.

[0049] (3) billet opening

[0050...

Embodiment 2

[0062] Present embodiment is the same as embodiment 1, and difference is:

[0063] The mass percent composition of alloy components adopted in step (1): Fe 20%, Cr 25%, Al 1.9%, Ti1.6%, Nb 0.7%, W 1.0%, V 1.0%, Mn 0.7%, Mo 0.2%, N 0.005%, B≤0.004%, the rest is Ni and unavoidable impurities. According to the above-mentioned alloy ingredients, vacuum smelting and vacuum autoconsumption (VAR) are used to cast billets at a casting temperature of 1600°C.

[0064] Step (2) The heating temperature for the homogenization treatment of the billet ingot is 1350° C. and the holding time is 2 hours.

[0065] In step (3), the blanking temperature is 1100°C, and the blank is air-cooled after blanking.

[0066] Step (5) The asynchronous rolling method is adopted for the strong deformation cold rolling, and the different speed ratio is 1.2 to 1.5. The asynchronous rolling is any one of the following: a method. The reduction in a single pass is 20%, and the total deformation is 98%.

[006...

Embodiment 3

[0070] Present embodiment is the same as embodiment 1, and difference is:

[0071] The mass percent composition of the alloy components used in the step (1): Fe 25%, Cr 22%, Al 1.6%, Ti1.5%, Nb 0.6%, W 0.8%, V 1.0%, Mn 0.7%, Mo 0.2%, N 0.03%, B 0.004%, and the rest are Ni and unavoidable impurities. According to the above-mentioned alloy ingredients, it is smelted in a vacuum electric arc furnace and cast into a billet at a casting temperature of 1580°C.

[0072] Step (2) The heating temperature for the homogenization treatment of the billet ingot is 1150° C. and the holding time is 6 hours.

[0073] In step (3), the billet opening temperature is 1150° C., and it is air-cooled after multi-directional piercing.

[0074] Step (5) adopts the asynchronous rolling method, the single-pass large reduction is 20%, and the total rolling reduction is greater than 95%, and the thickness of the semi-finished sheet is 0.6mm.

[0075] In step (7), the heat treatment temperature is 650° C...

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Abstract

The invention discloses a nickel-based alloy ultra-thin plate and a preparation method thereof. According to the percentage composition of the chemical components of alloy, the nickel-based alloy ultra-thin plate comprises 20%-30% of Fe, 20%-25% of Cr, 1.3%-1.9% of Al, 1.2%-1.6% of Ti, 0.5%-0.7% of Nb, 0.8%-1.0% of W, 0.5%-1.0% of V, 0.5%-0.7% of Mn, 0.2% of Mo, 0-0.02% of Zr, 0-0.15% of Si, 0-0.03% of C, 0.005%-0.04% of N, 0-0.004% of B, and the balance Ni and other inevitable impurities. The preparation method includes the steps of alloy smelting and casting, homogenization treatment, cogging, hot rolling, strong deformation cold rolling, finish rolling, recrystallization heat treatment and the like. By adoption of the mode of combining strong deformation rolling with heat treatment structure regulation and control, superfine crystallization and nano precipitated phase reinforcement of the alloy structure are realized, and the nickel-based alloy ultra-thin plate prepared through thepreparation mode has super strength and good ductility and toughness. Compared with the prior art, the nickel-based alloy ultra-thin plate prepared through the preparation method in the invention is simple in alloy composition, high in performance of ratio and long in service life, the preparation method and production technology are simple, industrialization scale production can be achieved withcommon industrial equipment, production efficiency is high and industrial application prospects are broad.

Description

technical field [0001] The invention belongs to the technical field of high-strength metal materials and processing, and in particular relates to an ultra-fine-grain nickel-based alloy ultra-thin plate and a preparation method thereof. Background technique [0002] Due to its good mechanical properties and superior high temperature resistance, corrosion resistance, and oxidation resistance, nickel-based alloys are widely used in industry. With the advancement of industrial technology, the industry has proposed higher comprehensive performance of nickel-based alloys. requirements, especially many applications require higher yield strength and tensile strength. Nickel-based alloys are dominated by nickel, usually with a content of more than 80% by mass. At the same time, rare and precious elements such as Co, Mo, W, and Nb are added to the alloy, and the cost of the alloy is relatively high. Most nickel-based alloys used at high temperatures have a face-centered cubic structu...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C30/00C22C1/02C22F1/10C22F1/00B21C37/02
CPCB21C37/02C22C1/023C22C19/055C22C30/00C22F1/10
Inventor 单爱党付立铭
Owner SHANGHAI JIAO TONG UNIV
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