Integrated manufacturing method of ultrahigh-strength alloy steel blind hole component

An alloy steel and ultra-high-strength technology, which is applied to the manufacturing field of gold steel blind-hole components, can solve the problem of high smelting cost of ultra-high-strength alloy steel, and achieve the effects of reducing smelting costs, reducing safety and accident hazards, and improving fracture toughness.

Active Publication Date: 2016-08-24
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an integral manufacturing method of super-high-strengt

Method used

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  • Integrated manufacturing method of ultrahigh-strength alloy steel blind hole component
  • Integrated manufacturing method of ultrahigh-strength alloy steel blind hole component
  • Integrated manufacturing method of ultrahigh-strength alloy steel blind hole component

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Experimental program
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Effect test

Embodiment 1

[0016] (1) G50 alloy steel is smelted by means of electric arc furnace + vacuum refining + vacuum self-consumption remelting. When the temperature of the refined molten steel drops to 1580-1630°C, it is cast into a Φ340×490mm ingot billet with self-hardening sand. The content of gas elements such as O and N in the steel ingot is 15-20ppm.

[0017] (2) Heating the steel ingot to the initial forging temperature of 1150°C for upsetting and elongation (such as figure 1 and figure 2 ), the final forging temperature is 860°C. Repeat the upsetting and elongation times for 3 times. The height reduction of the first upsetting is 45%, the height-to-diameter forging ratio of the first elongation is 2, and the obtained blank size is Φ304×608mm; the height reduction of the second upsetting is 57%, and the second The height-to-diameter forging ratio of the elongation is 1.8, and the blank size obtained is Φ315×567mm; the height reduction of the third upsetting is 55%, and the height-di...

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PUM

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Abstract

The invention discloses an integrated manufacturing method of an ultrahigh-strength alloy steel blind hole component. The method includes the steps of steel ingot preparation, heading and drawing cogging, integrated hot forming, heat treatment and other process steps. According to steel ingot preparation, a steel ingot casting blank is prepared through a method of refining outside an electric arc furnace and a vacuum furnace and vacuum arc remelting; according to the heading and drawing cogging, a steel ingot is heated to the initial forging temperature ranging from 1100 DEG C to 1200 DEG C, upsetting and drawing out are performed, the final forging temperature ranges from 800 DEG C to 900 DEG C, and circulation is performed in this way 2-4 times; and according to the heat treatment, oil quenching is performed after heat preservation is performed for 0.5-1 min at the temperature ranging from 860 DEG C to 900 DEG C, and then tempering is performed for 2-3 h at 260 DEG C to 300 DEG C. By means of the integrated manufacturing method, the overall strength and toughness performance of the ultrahigh-strength alloy steel blind hole component can be improved, the breakage toughness of the ultrahigh-strength alloy steel blind hole component can be improved, the smelting cost of an ultrahigh-strength alloy is reduced, and material waste is reduced.

Description

technical field [0001] The invention relates to a method for manufacturing a gold steel blind hole component. Background technique [0002] Ultra-high-strength alloy steel materials are widely used in weaponry and high-end equipment of the national economy due to their comprehensive properties such as ultra-high strength, excellent fracture toughness, and shear instability resistance. [0003] Ultra-high-strength steel mainly includes low-alloy ultra-high-strength steel, medium-alloy ultra-high-strength steel, and high-alloy ultra-high-strength steel. Among them, the strength of low-alloy ultra-high-strength steel such as 30CrMnSiNi2A, 40CrNi2Si2MoVA, 300M, and D6AC can reach more than 1600MPa, but Its fracture toughness is poor; the comprehensive mechanical properties of maraging steel and secondary hardening steel are high, such as 00Ni18Co8Mo5TiAl, Amert100 and other alloy steels have a strength of more than 2000MPa, but they contain a certain amount of precious metal Co,...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 陈强黄树海赵祖德陈文胡传凯林军舒大禹康凤
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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