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Method for solving too low low-temperature ballistic work after tempering of high alloy structure steel

A technology of alloy structural steel and low-temperature impact, which is applied in the field of metallurgy, can solve the problems of low low-temperature impact energy, and achieve the effects of preventing low-temperature impact energy from being low, preventing internal loss, and avoiding temper brittleness

Inactive Publication Date: 2020-09-11
建龙北满特殊钢有限责任公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of low low-temperature impact energy of high-alloy structural steel after quenching and tempering, the present invention provides a method for solving the problem of low-temperature impact energy of high-alloy structural steel after quenching and tempering

Method used

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  • Method for solving too low low-temperature ballistic work after tempering of high alloy structure steel
  • Method for solving too low low-temperature ballistic work after tempering of high alloy structure steel
  • Method for solving too low low-temperature ballistic work after tempering of high alloy structure steel

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Embodiment 1

[0018] The chemical composition of the high-alloy structural steel in this embodiment includes by weight percentage: C 0.45-0.50%, Si 0.40-0.50%, Mn 0.45-0.60%, P≤0.010%, S≤0.005%, Cr 2.00-2.50 %, Ni 4.00-4.50%, Mo 1.55-1.60%, V 0.15-0.20%, W 0.50-0.60%, Cu≤0.060%, Al≤0.030%, and the rest are Fe and unavoidable impurities.

[0019] The production process of high-alloy structural steel in this example is: electric furnace smelting + LF refining + VD vacuum refining → pouring steel ingot → rolling electrode blank 220*220mm → hot annealing → grinding → electroslag remelting → electroslag ingot hot delivery Annealing→heating, forging→annealing→primary roughing→flaw detection→drilling→secondary roughing→flaw detection→quenching and tempering→straightening→inspection, inspection→flaw detection→hand in.

[0020] High-alloy structural steel electric furnace smelting:

[0021] 1. In order to reduce the content of harmful elements as much as possible, the ingredients require pig iron ≥...

Embodiment 2

[0066] The chemical composition of the high-alloy structural steel in this embodiment includes by weight percentage: C 0.45-0.50%, Si 0.40-0.50%, Mn 0.45-0.60%, P≤0.010%, S≤0.005%, Cr 2.00-2.50 %, Ni 4.00-4.50%, Mo 1.55-1.60%, V 0.15-0.20%, W 0.50-0.60%, Cu≤0.060%, Al≤0.030%, and the rest are Fe and unavoidable impurities.

[0067] The production process of high-alloy structural steel in this example is: electric furnace smelting + LF refining + VD vacuum refining → pouring steel ingot → rolling electrode blank 220*220mm → hot annealing → grinding → electroslag remelting → electroslag ingot hot delivery Annealing→heating, forging→annealing→primary roughing→flaw detection→drilling→secondary roughing→flaw detection→quenching and tempering→straightening, rectification→inspection, inspection→flaw detection→hand in.

[0068] Among them, the method provided in this embodiment to solve the low-temperature impact energy of high-alloy structural steel after quenching and tempering incl...

Embodiment 3

[0072] The chemical composition of the high-alloy structural steel in this embodiment includes by weight percentage: C 0.45-0.50%, Si 0.40-0.50%, Mn 0.45-0.60%, P≤0.010%, S≤0.005%, Cr 2.00-2.50 %, Ni 4.00-4.50%, Mo 1.55-1.60%, V 0.15-0.20%, W 0.50-0.60%, Cu≤0.060%, Al≤0.030%, and the rest are Fe and unavoidable impurities.

[0073] The production process of high-alloy structural steel in this example is: electric furnace smelting + LF refining + VD vacuum refining → pouring steel ingot → rolling electrode blank 220*220mm → hot annealing → grinding → electroslag remelting → electroslag ingot hot delivery Annealing→heating, forging→annealing→primary roughing→flaw detection→drilling→secondary roughing→flaw detection→quenching and tempering→straightening, rectification→inspection, inspection→flaw detection→hand in.

[0074] Among them, the method provided in this embodiment to solve the low-temperature impact energy of high-alloy structural steel after quenching and tempering incl...

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Abstract

The invention relates to a method for solving too low low-temperature ballistic work after tempering of high alloy structure steel, and belongs to the technical field of metallurgy. In order to solvethe problem that the low-temperature ballistic work is too low after tempering of the high alloy structure steel, the method for solving the too low low-temperature ballistic work after tempering of the high alloy structure steel is provided and comprises the tempering processes of quenching and high-temperature hardening and tempering. According to the high-temperature hardening and tempering process, a quenched and cooled steel material is heated to be 590+ / -5 DEG C, and heat preservation is carried out for 8 h after temperature equalization; and then water cooling is adopted for cooling thesteel material to range from 50 DEG C to 100 DEG C, the second kind of temper brittleness is avoided, the too low low-temperature ballistic work caused by temper brittleness is avoided, the -40DEG Cballistic work of the high alloy structure steel is qualified, the product delivery cycle is shortened, and inner losses of steel are avoided.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for solving low-temperature impact energy of high-alloy structural steel after quenching and tempering. Background technique [0002] High-alloy structural steel refers to alloy structural steel with a total amount of alloying elements of more than 10%. Adding a large amount of alloying elements can obtain various special properties, especially to improve corrosion resistance in different media, high temperature Excellent thermal strength and oxidation resistance, high toughness at low temperature are the most prominent. [0003] Low temperature impact energy is the ability of a material to resist impact at low temperature, which reflects the toughness of the material at a certain temperature. Generally speaking, the lower the temperature, the slower the molecular movement of the material, the relatively smaller force between molecules, and the lower the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/25C21D6/00C21D11/00C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46
CPCC21D1/25C21D6/004C21D6/005C21D6/008C21D11/00C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46
Inventor 马天超陈列董贵文刘光辉张立明李艾李庆斌
Owner 建龙北满特殊钢有限责任公司
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