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A heat-treated steel alloy

A technology for heat-treating steel and alloys, applied in the field of iron and steel materials, can solve the problems of unimproved mechanical properties, lack of durability, insufficient strength, etc., and achieve the effects of good durability, increased strength and forgeability, and good overall performance.

Active Publication Date: 2018-02-23
QINGDAO BRANCH CO., LTD. OF MECHANICAL SCIENCE RESEARCH INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing steel alloys have insufficient strength, low forgeability, no good durability, and mechanical properties need to be improved. For this reason, we propose a heat-treated steel alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of heat treatment steel alloy that the present invention proposes, comprises the raw material of following percentage by weight:

[0019] C: 1.2%; Al: 0.12%; Mo: 0.008%; Mn: 0.5%; B: 0.5%; Ni: 0.1%; Si: 3.55%; Ti: 0.004%; V: 0.1%; W: 0.005%; Cr: 0.5%; Nb: 0.05%; Re: 0.05%; the balance is Fe.

[0020] Its preparation method comprises the following steps:

[0021] S1, weighing each raw material according to the weight percentage, adding the above-mentioned raw materials into the melting furnace in sequence, the melting temperature is 1000°C, and continuing for 4 minutes to obtain a billet;

[0022] S2, perform heat treatment on the billet, the process parameters of heat treatment are: heating at a heating rate of 100 °C / h to a temperature of 250 °C, and then heating at a heating rate of 120 °C / h to 1050 °C, after a holding time of 3 hours, the transition temperature is 550 °C, The holding time is 10 minutes to obtain the preform;

[0023] S3, heat the preform in...

Embodiment 2

[0025] A kind of heat treatment steel alloy that the present invention proposes, comprises the raw material of following percentage by weight:

[0026] C: 1.3%; Al: 0.13%; Mo: 0.009%; Mn: 0.7%; B: 0.7%; Ni: 0.6%; Si: 3.8%; Ti: 0.006%; V: 0.8%; W: 0.007%; Cr: 0.8%; Nb: 0.07%; Re: 0.08%; Be: 0.12%; the balance is Fe.

[0027] Its preparation method comprises the following steps:

[0028] S1, weighing each raw material according to the weight percentage, adding the above raw materials into the melting furnace in sequence, the melting temperature is 1100°C, and lasts for 4.5 minutes to obtain the billet;

[0029] S2, perform heat treatment on the billet, the process parameters of heat treatment are: heating at a heating rate of 100°C / h to a temperature of 275°C, and then heating at a heating rate of 120°C / h to 1075°C, after a holding time of 3.5 hours, the transition temperature is 575°C , the holding time is 11 minutes, and the preform is obtained;

[0030] S3, heat the pre-pr...

Embodiment 3

[0032] A kind of heat treatment steel alloy that the present invention proposes, comprises the raw material of following percentage by weight:

[0033] C: 1.35%; Al: 0.14%; Mo: 0.013%; Mn: 0.75%; B: 0.85%; Ni: 0.8%; Si: 3.9%; Ti: 0.007%; Cr: 2.2%; Nb: 0.11%; Re: 0.11%; Be: 0.15%; the balance is Fe.

[0034] Its preparation method comprises the following steps:

[0035] S1, weighing each raw material according to the weight percentage, adding the above-mentioned raw materials into the melting furnace in sequence, the melting temperature is 1300°C, and continuing for 5 minutes to obtain a billet;

[0036] S2, perform heat treatment on the billet, the process parameters of heat treatment are: heating at a heating rate of 100 °C / h to a temperature of 300 °C, and then heating at a heating rate of 120 °C / h to 1100 °C, after a holding time of 4 hours, the transition temperature is 600 °C, The holding time is 14min, and the preform is obtained;

[0037] S3, heat the preform in S2 a...

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PUM

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Abstract

The invention discloses a heat treatment steel alloy. The heat treatment steel alloy comprises the following raw materials in percentage by weight: 1.2%-1.5% of C, 0.12%-0.16% of Al, 0.008%-0.018% of Mo, 0.5%-1.0% of Mn, 0.5%-1.2% of B, 0.1%-1.4% of Ni, 3.55%-4.15% of Si, 0.004%-0.01% of Ti, 0.1%-4.2% of V, 0.005%-0.01% of W, 0.5%-4.2% of Cr, 0.05%-0.15% of Nb, 0.05%-0.16% of Re, 0-0.24% of Be, and the balance Fe. A preparation method of the heat treatment steel alloy comprises the following steps: (S1) all the raw materials are weighed in percentage by parts, and are added in a smelting furnace in sequence, the smelting temperature is 1000-1600 DEG C, the smelting is 4-6 min, and a blank is obtained; and (S2) the blank is heated, wherein the heat treatment has the following process parameters that the blank is heated to reach a temperature of 250-350 DEG C at a heating speed of 100 DEG C / h, and is heated to reach a temperature of 1050-1150 DEG C at a heating speed of 120 DEG C / h. The heat treatment steel alloy is reasonable in composition proportion and simple in preparation process; and the prepared steel alloy is excellent in comprehensive performance, improves the durability, and is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of iron and steel materials, in particular to a heat-treated steel alloy. Background technique [0002] Steel alloys have been around for over a hundred years. The industrial use of alloy steel was about the second half of the 19th century. At that time, due to the increasing production and use of steel, the machinery manufacturing industry needed to solve the problem of steel processing and cutting. In 1868, the British Mahit invented the self-hardening steel with a composition of 2.5% Mn-7% W, which increased the cutting speed. to 5 m / min. With the development of commerce and transportation, a bridge with a span of 158.5 meters was built on the Mississippi River in the United States in 1870 with chromium steel (1.5-2.0% Cr); due to difficulties in processing components, some industrial countries later switched to nickel Steel (3.5% Ni) for building long-span bridges. At the same time, some countries al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C22C38/46C22C38/50C22C38/44C22C38/06C22C38/04C22C38/02C22C38/26C21D6/00
CPCC21D6/008C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/26C22C38/34C22C38/44C22C38/46C22C38/50C22C38/54
Inventor 孙瑞涛李永栋
Owner QINGDAO BRANCH CO., LTD. OF MECHANICAL SCIENCE RESEARCH INSTITUTE
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