A heat treatment process for low-density steel and its preparation method

A low-density steel and process technology, which is applied in the heat treatment process of low-density steel and its preparation field, can solve the problems that the performance cannot meet the requirements of some structural parts, and achieve the elimination of residual carbides, increase the degree of compactness, and prevent quality reduction Effect

Active Publication Date: 2021-04-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problem that the performance of existing low-density steel cannot meet the requirements of some structural parts in industries such as automobiles, the present invention provides a heat treatment process for low-density steel, which can effectively improve the strength and toughness of low-density steel to meet Requirements for the use of some structural parts

Method used

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  • A heat treatment process for low-density steel and its preparation method

Examples

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Effect test

Embodiment 1

[0060] 1. Smelting

[0061] According to weight percentage, Mn: 30%, Al: 9%, C: 0.9%, Si: 1%, Mo: 0.45%, P: 0.003%, S: 0.003%, and the rest is Fe into the vacuum induction melting furnace. For smelting, argon gas is introduced into the furnace during the smelting process, and additives are added to the molten steel during the smelting process, and the temperature of the molten steel is 1623°C. The addition amount of the additive is 0.01% of the molten steel, and the chemical composition and its mass parts are: rare earth: 10 parts; kaolin: 5 parts; biomass: 2 parts.

[0062] 2. Casting

[0063] Prepare the corresponding mold, lay 2 layers of horse manure paper on the bottom surface of the mold, evenly spread mold slag on the horse manure paper, pour molten steel into the mold for casting, when casting, the mold temperature of the mold is 150 ℃, control the liquid steel The degree of superheat is 25°C. The total amount of mold slag added is 0.2% of the molten steel mass, and...

Embodiment 2

[0076] The basic steps of this example are basically the same as Example 1, the difference is that the following substances are added by weight percentage in the smelting step of this example: Mn: 27%, Al: 10%, C: 1%, Si: 1 %, Mo: 0.5%, P: 0.003%, S: 0.003%, and the rest is Fe.

Embodiment 3

[0078] The basic steps of the present embodiment are basically the same as in the embodiment 1, the difference is that the heat treatment process of the present embodiment is as follows:

[0079] (1) Solution treatment

[0080] Put the hot-rolled low-density steel plate into a vacuum heating furnace at a temperature of 420°C and keep it warm for 35 minutes, then raise the temperature of the heating furnace to 670°C at a rate of 210°C / h and hold it for 35 minutes minutes, then the temperature was raised to 1150°C at a heating rate of 210°C / h, and after 2 hours of heat preservation, the steel plate was taken out and water-cooled to room temperature at a cooling rate of 20°C / s.

[0081] (2) Carbide treatment

[0082] Put the low-density steel obtained in Step 1 into a vacuum heating furnace in a vacuum state, heat to 800° C., keep it warm for 2 hours, take it out and air-cool it to room temperature.

[0083] (3) Aging treatment

[0084] Heat the low-density steel obtained in s...

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Abstract

The invention discloses a heat treatment process of low-density steel and a preparation method thereof, belonging to the field of metallurgical production. The heat treatment process includes solution treatment, carbide treatment and aging treatment, which can effectively improve the strength and toughness of low-density steel and meet the requirements of some structural parts. The preparation method includes smelting, casting, hot rolling and heat treatment, wherein the heat treatment adopts the heat treatment process of the above-mentioned low-density steel, which can effectively improve the mechanical properties and processing properties of the low-density steel, and obtain high strength and toughness. low density steel.

Description

technical field [0001] The invention belongs to the technical field of metallurgical production, and more specifically relates to a heat treatment process of low-density steel and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the automobile industry, the demand and production of automobiles are increasing day by day, and people's requirements for automobile performance are also getting higher and higher, which makes the automobile industry gradually develop in the direction of lightweight and safety. For the automobile industry, reducing dead weight is the only way to reduce costs and achieve sustainable development, and the use of low-density materials can effectively reduce the weight of automobiles, energy consumption and environmental pollution, and reduce the cost of use. Therefore, how to prepare low-density materials with excellent performance has become an important issue in automobile manufacturing. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D1/773C21D8/00C22C38/12C22C38/06C22C38/04C22C38/02C22C33/04C21C7/00B22D27/00B22D27/02
CPCB22D27/00B22D27/02C21C7/00C21D1/18C21D1/773C21D8/005C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 王萍郭爱民黄贞益侯清宇郭云侠章小峰光剑锋马玉康马啸宇伍厚玲黄华钦
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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