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Weldable sintered metal powder bearing, and its production process

A technology of powder metallurgy and weldability, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of increased friction, poor product adaptability, and lack of lubrication effect, etc., to achieve high strength and wear resistance good sex effect

Inactive Publication Date: 2009-03-11
揭朝奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fatal flaw of this kind of oil bearing in the welding process is that the oil is easy to burn, which increases the difficulty of welding
In addition, due to the high-temperature combustion of the arc during the welding process, the oil content of the bearing is reduced, and oil lubrication cannot be achieved, and a state of oil-free lubrication appears, which does not achieve the ideal lubrication effect, increases friction, and shortens the service life. life
Furthermore, as the country pays more and more attention to environmental protection, in the machinery industry, many mechanical bodies have changed from castings to sheet metal parts, and are developing in the direction of lightness, beauty, and streamlined shape, especially for some low-speed, rotating, sliding For parts with low load requirements, the bearing installation requirements are to be directly installed on the sheet metal parts to achieve weldability, and at the same time incorporate the lubrication characteristics of oil-free lubricated bearings to achieve oil-free lubrication, but the current powder metallurgy bearings cannot meet this requirement. Lead to poor adaptability of existing technology products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A weldable powder metallurgy bearing described in this embodiment has a material formula of 100 parts of iron powder with a fineness of 100 mesh, 1 part of graphite powder with a fineness of 200 mesh, 0.5 part of molybdenum disulfide, and 3 parts of copper powder.

Embodiment 2

[0011] A weldable powder metallurgy bearing described in this example, the material formula is 100 parts of iron powder with a fineness of 100 mesh, 0.5 part of graphite powder with a fineness of 100 mesh, 0.4 part of molybdenum disulfide, 0.08 part of machine oil, and 1 part of copper powder .

Embodiment 3

[0013] A weldable powder metallurgy bearing described in this example, the material formula is 100 parts of Anshan water atomized iron powder with a fineness of 100 mesh, 1 part of graphite powder with a fineness of 200 mesh, 0.5 part of molybdenum disulfide, 0.08 part of engine oil, 3 parts of copper powder, 0.8 parts of zinc stearate; put the materials into the special-shaped drum, adjust the speed at 40 rpm, rotate for 2 hours, mix evenly, press and form at 6 tons / square centimeter, and enter the mesh crawler furnace Sintering, the sintering temperature is controlled at 1050°C, the steam treatment temperature can be at 560°C-600°C, and finally hot dipped in oil at a temperature of 160°C, the resulting bearing has a surface hardness of 80 to 120HB and a crush strength of more than 400M Pa, with an oil density of 6.8 to 7.2g / cm 3 , The oil content is greater than 12%.

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PUM

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Abstract

The invention discloses weldability powder metallurgy bearing and its manufacturing technique. The powder material compositions includes 100 part iron powder, 0.5-1.2 part graphite powder, 0.4-0.5 part supramoly, and 0.5-3 part copper powder. It also includes 0.8 part organic oil and under 0.8 part zinc stearate. The carbon content in the finished bearing is 0.4 percent. Its manufacturing technique is as follows: mixing uniformly powder material; pressing; sintering; the sintering temperature is from 1050 centigrade degree to 1200 centigrade degree; repeating pressing or fine finishing; doing steam treatment or quenching; and doing hot immersion oil. Its advantages are no distortion and little abrasion. And it can be directly used to weld.

Description

technical field [0001] The invention relates to a new material bearing, in particular to a weldable powder metallurgy bearing and a production process. Background technique [0002] At present, the powder metallurgy bearings appearing on the market all go through the process of mixing - stirring - forming - sintering - shaping - secondary sintering - mechanical processing - heat treatment - vibration grinding - vacuum oil immersion and other processes, it is an oil bearing, to achieve effective Oil lubricated. The fatal flaw of this oil bearing in the welding process is that the oil is easy to burn, which increases the difficulty of welding. In addition, due to the high-temperature combustion of the arc during the welding process, the oil content of the bearing is reduced, and oil lubrication cannot be achieved, and a state of oil-free lubrication appears, which does not achieve the ideal lubrication effect, increases friction, and shortens the life of the bearing. life. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/00C22C9/02F16C33/12
Inventor 揭朝奎
Owner 揭朝奎