A preparing method of a Cu-containing low-alloy steel automobile wheel hub bearing unit

A wheel hub bearing and molten steel technology, applied in the field of steel rolling, can solve the problems of large inertial resistance, ugly appearance, poor heat dissipation, etc., and achieve the effects of strong thermal conductivity, simple casting process, and strong economic benefits

Active Publication Date: 2014-10-08
ANHUI JISITE INTELLIGENT EQUIP CO LTD
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Problems solved by technology

However, the disadvantages of steel hub bearing units are also relatively prominent, namely, ugly appearance (it can be said that there is no appearance at all), heavy weight (the steel

Method used

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Embodiment Construction

[0016] A method for preparing a Cu-containing low-alloy steel automobile hub bearing unit, the chemical composition of the steel is: 0.24-0.33% carbon, 2.25-3.32% silicon, 0.23-0.40% manganese, 0.002-0.003% molybdenum Phosphorus, 0.006-0.008% sulfur, 0.12-0.22% chromium, 0.06-0.08% nickel, 0.003-0.009% molybdenum, 0.087-0.098% tungsten, 0.001-0.002% titanium, 0.01-0.02% aluminum , 0.0002-0.0003% lead, 0.002-0.004% strontium, 0.002-0.005% copper, and the balance is iron. The preparation steps are as follows:

[0017] (1) Add scrap steel, pig iron, low-carbon ferrochrome, scrap aluminum, sponge iron, and smelting additives equivalent to 1-1.5% of the total mass of the above-mentioned charge into an intermediate frequency induction furnace for mixing, heating and melting. 12-15 parts of sodium, 4.5-5.5 parts of aluminum oxide, 3-6 parts of potassium oxide, 6-8 parts of sodium sulfate, 4-6 parts of silicon dioxide, 2.5-4 parts of titanium dioxide, and 6-8 parts of anhydrous borax ...

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Abstract

A preparing method of a Cu-containing low-alloy steel automobile wheel hub bearing unit is disclosed. The steel comprises following chemical components by weight: 0.24-0.33% of carbon, 2.25-3.32% of silicon, 0.23-0.40% of manganese, 0.002-0.003% of phosphor, 0.006-0.008% of sulfur, 0.12-0.22% of chromium, 0.06-0.08% of nickel, 0.003-0.009% of molybdenum, 0.087-0.098% of tungsten, 0.001-0.002% of titanium, 0.01-0.02% of aluminium, 0.0002-0.0003% of lead, 0.002-0.004% of strontium and 0.002-0.005% of copper, with the balance being iron. The method guarantees excellent characteristics comprising simple casting processes, difficult deformation and high heat conductivity of the alloy material, effectively reduces the cost of the alloy material at present of the automobile wheel hub bearing unit, and has good economic benefit.

Description

[0001] technical field [0002] The invention relates to a preparation method of a Cu-containing low-alloy steel automobile hub bearing unit, belonging to the technical field of steel rolling. [0003] Background technique [0004] At present, the wheel hub bearing units on the market can be divided into steel hub bearing units and alloy hub bearing units according to their materials, and each has its own advantages and disadvantages. [0005] The most important advantage of steel hub bearing units is that the manufacturing process is simple (casting process is generally used, for example, aluminum alloy hub bearing units are generally produced by low-pressure casting process) and the cost is relatively low, and the ability to resist metal fatigue is very strong, that is, our Commonly known as cheap and strong. However, the disadvantages of steel hub bearing units are also relatively prominent, namely, ugly appearance (it can be said that there is no appearance at all), he...

Claims

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Application Information

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IPC IPC(8): C22C38/60B22C9/24C21D9/40C21D1/20C21D1/26C23C28/00
CPCY02P10/20
Inventor 章功国王泾文段宗银李纯金陈超王淑妍张少伍王晓芬谢勇
Owner ANHUI JISITE INTELLIGENT EQUIP CO LTD
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