Manufacturing method of high-strength high-tenacity alloy steel

A manufacturing method and technology of alloy steel, applied in the field of steel alloy, can solve the problems of high production cost and achieve the effects of low carbon content, excellent weather resistance, uniform structure and mechanical uniformity

Inactive Publication Date: 2016-03-09
ANHUI CHUJIANG SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned high-strength, high-toughness alloy steel is low-carbon steel, and the content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] S1: Weigh the chemical composition as carbon 0.3%, silicon 0.25%, manganese 0.55%, phosphorus ≤ 0.025%, sulfur 0.02%, chromium 0.09%, nickel 0.28%, molybdenum 0.02%, titanium 0.18%, vanadium 0.2%, tungsten 0.4 %, niobium 0.3%, cobalt 0.11%, copper 0.2%, aluminum ≤ 0.2%, boron ≤ 0.15%, nitrogen ≤ 0.3% and unavoidable impurities are mixed and put into the smelting furnace for smelting to obtain alloy steel blanks;

[0054] S2: After annealing the alloy steel billet obtained in step S1, place it on a forging machine for high-temperature forging to obtain a crude alloy steel product;

[0055] S3. After heat-treating the crude alloy steel product obtained in step S2, performing initial hot rolling and fine hot rolling operations in sequence to obtain a finished product of high-strength and high-toughness alloy steel;

[0056] S4. After the finished high-strength and high-toughness alloy steel product obtained in step S3 is annealed and heat-treated, it is cooled to room temp...

Embodiment 2

[0063] S1: Weigh the chemical composition as carbon 0.58%, silicon 1.38%, manganese 1.55%, phosphorus ≤ 0.025%, sulfur 0.025%, chromium 1.32%, nickel 0.62%, molybdenum 0.035%, titanium 0.20%, vanadium 0.5%, tungsten 0.9 %, niobium 0.3-0.6%, cobalt 0.15%, copper 0.8%, aluminum ≤ 0.2%, boron ≤ 0.15%, nitrogen ≤ 0.3% and unavoidable impurities are mixed and put into the smelting furnace for smelting to obtain alloy steel blanks;

[0064] S2: After annealing the alloy steel billet obtained in step S1, place it on a forging machine for high-temperature forging to obtain a crude alloy steel product;

[0065] S3. After heat-treating the crude alloy steel product obtained in step S2, performing initial hot rolling and fine hot rolling operations in sequence to obtain a finished product of high-strength and high-toughness alloy steel;

[0066] S4. After the finished high-strength and high-toughness alloy steel product obtained in step S3 is annealed and heat-treated, it is cooled to ro...

Embodiment 3

[0073] S1: Weigh the chemical composition as carbon 0.4%, silicon 0.28%, manganese 0.65%, phosphorus ≤ 0.025%, sulfur 0.025%, chromium 0.8%, nickel 0.62%, molybdenum 0.03%, titanium 0.19%, vanadium 0.3%, tungsten 0.6% %, niobium 0.6%, cobalt 0.14%, copper 0.5%, aluminum ≤ 0.2%, boron ≤ 0.15%, nitrogen ≤ 0.3% and unavoidable impurities are mixed and put into the smelting furnace for smelting to obtain alloy steel blanks;

[0074] S2: After annealing the alloy steel billet obtained in step S1, place it on a forging machine for high-temperature forging to obtain a crude alloy steel product;

[0075] S3. After heat-treating the crude alloy steel product obtained in step S2, performing initial hot rolling and fine hot rolling operations in sequence to obtain a finished product of high-strength and high-toughness alloy steel;

[0076] S4. After the finished high-strength and high-toughness alloy steel product obtained in step S3 is annealed and heat-treated, it is cooled to room tem...

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Abstract

The invention discloses a manufacturing method of high-strength high-tenacity alloy steel. The high-strength high-tenacity alloy steel is prepared from the following chemical components by weight percent: 0.3-0.58% of carbon, 0.25-1.38% of silicon, 0.55-1.55% of manganese, 0.025% or less of phosphorus, 0.02-0.025% of sulphur, 0.09-1.32% of chromium, 0.28-0.62% of nickel, 0.02-0.035% of molybdenum, 0.18-0.20% of titanium, 0.2-0.5% of vanadium, 0.4-0.9% of tungsten, 0.3-0.6% of niobium, 0.11-0.15% of cobalt, 0.2-0.8% of copper, 0.2% or less of aluminum, 0.15% or less of boron, 0.3% or less of nitrogen and unavoidable impurities. According to the manufacturing method, medium carbon steel is adopted to produce the high-strength high-tenacity alloy steel, the production cost is relatively low, the tensile strength, the yield strength and the hardness are relatively high, and a wide application prospect is ensured.

Description

technical field [0001] The invention relates to the technical field of steel alloys, in particular to a method for manufacturing high-strength and high-toughness alloy steel. Background technique [0002] In the prior art, the carbon content of alloy steel is relatively high, for example, 100 and 100W steel in the American Society for Testing and Materials standard ASTMA709 / A709M-01b, its carbon content is greater than 0.10%, although this alloy steel has high strength, But its toughness and welding performance are poor. Patent application number 2004100967957 discloses a kind of alloy steel. The alloy steel is produced by the TMCP+RPC+SQ method, and the high-strength steel with a tensile strength level of 800MPa is obtained, and the steel is delivered in a quenched state, but the residual stress of the alloy steel is relatively large. Alloy steel does not contain Cr, so its weather resistance is poor. Patent application number 200410061112.4 also discloses an alloy steel...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14C22C38/16C22C38/18C22C38/08C22C33/04C21D8/02C21D1/26
CPCC22C38/02C21D1/26C21D8/0226C22C33/04C22C38/04C22C38/105C22C38/12C22C38/14C22C38/16C22C38/18
Inventor 陶军董邦林圣祥
Owner ANHUI CHUJIANG SPECIAL STEEL CO LTD
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