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Steel for axle housing and preparation method thereof

An axle housing and axle technology, applied in the field of automobile brake pads, can solve problems such as affecting product quality and service life, easy cracking, etc., and achieve excellent stamping and welding performance, small stamping springback, and improved mechanical properties. Effect

Inactive Publication Date: 2016-02-03
SHANDONG TRANSPORT VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of these steels is that they are easy to crack after stamping, welding and shaping, which seriously affects the quality and service life of the products.

Method used

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  • Steel for axle housing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Production of steel plates for axle housings with a thickness of 16 mm.

[0022] A steel for axle housing, its chemical composition and weight percentage are: C: 0.096%, Si: 0.89%, Mn: 0.75%, P: 0.015%, S: 0.003%, Al: 0.029%, Ti: 0.046 %, Nb: 0.059%, Mo: 0.18%, Ce: 0.52%, W: 4.96%, Cr: 1.72%, and the rest are Fe and unavoidable impurities.

[0023] A method for preparing steel for an axle housing, characterized in that it comprises the following steps:

[0024] 1) According to the chemical composition and weight percentage of the above-mentioned steel for the axle housing, the ingredients are prepared and smelted, and the temperature of the molten steel is 1685°C to 1690°C;

[0025] 2) Carry out vacuum treatment: the treatment time is 16 minutes, and the vacuum degree is kept at 725Pa;

[0026] 3) Carry out continuous casting into blanks, the molten steel temperature is in the range of 1600°C to 1650°C, the casting speed is 1.4 m / min, and the casting frequency is 120 ...

Embodiment 2

[0032] Production of steel plates for axle housings with a thickness of 14mm

[0033] A steel for axle housings, the chemical composition and weight percentage are: C: 0.12%, Si: 0.85%, Mn: 1.19%, P: 0.017%, S: 0.005%, Al: 0.07%, Ti: 0.06% , Nb: 0.05%, Mo: 0.12%, Ce: 0.62%, W: 4.8%, Cr: 1.68%, and the rest are Fe and unavoidable impurities.

[0034] A method for preparing the steel for the axle housing of the claim, comprising the following steps:

[0035] 1) According to the chemical composition and weight percentage of the above-mentioned steel for the axle housing, the ingredients are prepared and smelted, and the temperature of the molten steel is 1660°C to 1685°C;

[0036] 2) Carry out vacuum treatment: the treatment time is 15 minutes, and the vacuum degree is kept at 700Pa;

[0037] 3) Carry out continuous casting into blanks, the molten steel temperature is in the range of 1550°C to 1650°C, the casting speed is 1.3 m / min, and the casting frequency is 105 times / min; ...

Embodiment 3

[0043] Production of 12mm thick steel plates for axle housings

[0044] A steel for axle housings, the chemical composition and weight percentage are: C: 0.08%, Si: 1.0%, Mn: 0.62%, P: 0.013%, S: 0.012%, Al: 0.055%, Ti: 0.05% , Nb: 0.062%, Mo: 2.1%, Ce: 0.48%, W: 5.2%, Cr: 0.32%, and the rest are Fe and unavoidable impurities.

[0045] A method for preparing steel for the axle housing, comprising the following steps:

[0046] 1) According to the chemical composition and weight percentage of the above-mentioned steel for the axle housing, the ingredients are prepared and smelted, and the temperature of the molten steel is 1650°C to 1660°C;

[0047] 2) Carry out vacuum treatment: the treatment time is 13 minutes, and the vacuum degree is kept at 680Pa;

[0048] 3) Carry out continuous casting into blanks, the temperature of molten steel is in the range of 1550°C to 1650°C, the casting speed is 1.2-1.4 m / min, and the casting frequency is 90-120 times / min;

[0049] 4) Heating t...

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Abstract

The invention discloses a steel for an axle housing and a preparation method thereof, which has good stamping forming performance and welding performance, small springback after stamping and good shape retention. A steel for axle housing, the chemical composition and weight percentage are: C: 0.08%-0.12%, Si: 0.85%-1.0%, Mn: 0.62%-1.19%, P: ≤0.020%, S: ≤ 0.012%, Al: 0.025% to 0.07%, Ti: 0.041% to 0.06%, Nb: 0.05% to 0.062%, Mo: 0.12 to 2.1%, Ce: 0.48 to 0.62%, W: 4.8 to 5.2%, W: 4.8-5.2%, Cr: 1.68%-0.32%, the rest is Fe and unavoidable impurities. A method for preparing steel for axle housings, comprising the following steps: batching and smelting; performing vacuum treatment; performing continuous casting into blanks; heating the casting blanks; performing rough rolling; finishing rolling; and quenching and tempering heat treatment after forming.

Description

technical field [0001] The invention relates to an automobile brake pad, in particular to a steel for an axle housing and a preparation method thereof. Background technique [0002] The axle is one of the main components of the vehicle driving system. It supports the weight of the frame and the subsequent assemblies of the frame, and at the same time protects the components in the transmission system. With the development of axle housing manufacturing technology and the need for automobile weight reduction and energy saving, especially for the driving axle housing of trucks, hot-rolled steel plates with a thickness of 12 to 16 mm have been used to make stamped and welded axle housings, replacing the complex manufacturing process and production. Inefficient, bulky and expensive cast axle housings. [0003] At present, ordinary steel plates such as 16MnL, 09SiVL, 08Ti, T52, etc. are generally used as hot-rolled steel plates for high-strength automobile stamping and welding ax...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C22C33/04C21D8/00
Inventor 吴玉茵王益军王真
Owner SHANDONG TRANSPORT VOCATIONAL COLLEGE
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