Iron-based powder metallurgy self-lubricating material, preparation method and heating charge pad slide plate using the material

Abstract

The invention discloses an iron-based powder metallurgy self-lubricating material, which comprises the following components: manganese 10-12.4%; sulfur 14.12-17.71%; chromium 7.82-9.15%; nickel 2.91-3.84%; molybdenum 0.91-3.04%; Graphite 2.1-5.1%, oxygen 1.8-2.36%, and the rest is iron, the above are mass percentages. The invention also discloses a preparation method of the iron-based powder metallurgy self-lubricating material and a heating charge pad slide plate using the material; the invention can ensure its self-lubricating property between 500-650°C and has higher strength , moderate hardness and toughness and low expansion coefficient can meet the needs of preset working conditions, prolong the service life and reduce production costs.

Description

technical field [0001] The invention relates to an iron-based powder metallurgy self-lubricating material, a preparation method and a heating charge pad slide plate using the material. Background technique [0002] At present, the aluminum slab heating furnace in the aluminum processing industry is transported by the material cushion slider supported on the guide rail. The material cushion slider moves on the guide rail and carries the aluminum slab. They pass through the heating furnace and are heated to The rolling temperature is about 650°C; the existing pad slide includes a slide base and several inserts. The slide base is provided with more than one stepped mounting hole and several insert holes, and each insert hole has a Cylindrical insert, the cylindrical insert and the insert hole are in an interference fit; when in use, the aluminum slab is placed on several pad slides, and the insert is in contact with the guide rail; therefore, the insert requires a certain degre...

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Problems solved by technology

[0002] At present, the aluminum slab heating furnace in the aluminum processing industry is transported by the material cushion slider supported on the guide rail. The material cushion slider moves on the guide rail and carries the aluminum slab. They pass through the heating furnace and are heated to The rolling temperature is about 650°C; the existing pad slide includes a slide base and several inserts. The slide base is provided with more than one stepped mounting hole and several insert holes, and each insert hole has a Cylindrical insert, the cylindrical insert and the insert hole are in an interference fit; when in use, the aluminum slab is placed on several pad slides, and the insert is in contact with the guide rail; therefore, the insert requires a certain degree of self-lubrication , it is convenient to move the workpiece in the furnace, and has a certain strength and toughness, which is convenient for load bearing, wear resistance and thermal shock, and its hardness should not be too high. If it is higher than or close to the hardness of the guide rail, the guide rail will wear faster, such as replacing the guide rail The cost is high and affects production, and its expansion coefficient should be relatively small, so as not to break the skateboard seat when it is exposed to heat and affect its service life; and the existing iron-based powder metallurgy self-lubricating materials, if they want to maintain their self-lubricating properties at high temperature stages, Its hardness and expansion coefficient are high, and its toughness is also poor. It cannot meet the above requirements at the same time, and it is easy to cause damage to the guide rail or the pad slider, which increases the cost and affects the production.

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