CN201891950U

CN201891950U - Bimetallic composite tube

Info

Publication number: CN201891950U
Application number: CN2010205049030U
Authority: CN
Inventors: 傅德生
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-26
Filing date: 2010-08-26
Publication date: 2011-07-06
Anticipated expiration: 2020-08-26

Abstract

The utility model discloses a bimetallic composite tube which has a metallic composite structure, wherein the external layer of the bimetallic composite tube is a carbon-steel structure layer (1), the internal layer is a cast iron base layer (3), and the intermediate layer is a fusion layer (2) combining carbon steel and cast iron. Having such a structure, the bimetallic composite tube is reasonable in structure design and strong in abrasion and corrosion resistance. And, the bimetallic composite tube is unlikely to seep or to be broken.

Description

A kind of composite bimetal pipe

Technical field

The utility model relates to a kind of conveyance conduit device, especially is applicable to a kind of composite pipe of conveyance conduit.

Background technique

Line transportation is a common mass transport mode in producing.As coal dust, lime-ash, the slip in mine, the mine tailing of power plant, the dredger conveyance conduit also have the material in chemical plant, food factory, coal washery, cement plant etc. also often to adopt line transportation, so the pipeline consumption is very huge.Because the conveying of material all is that remote pressure is carried in producing, pipeline not only bears pressure, and bear serious wearing and tearing and corrosion, for safe in utilization, the toughness of paying the utmost attention to pipeline is necessary, therefore usually use Q235,16Mn steel to make pipeline, but this type of steel pipeline causes premature failure because of wear resistance and corrosion resistance wretched insufficiency, the steel pipe loss that is used for conveying material domestic every year reaches tens00000000 yuan.

In order to improve the working life of pipeline, multiple multiple tube has appearred, as adopt disappearance mould vacuum suction casting technique in steel pipe, to cast wear-resisting or corrosion-resistant alloy layer, adopt the self propagating high temperature synthesis method in steel pipe, to sinter ceramic layer into, also have in steel pipe, inlay one deck elastometric lining or in steel pipe bonding one deck ceramic plate etc. form multiple tube, but above-mentioned pipeline all has problems to some extent, exist inevitably between composite pipe steel pipe that lost foam is produced and the wear-and corrosion-resistant layer and ask the crack more greatly, often produce wear-resisting or the anticorrosion layer obscission; The composite pipe ceramic layer that the self propagating high temperature synthesis method is produced is thin and crisp, and has a large amount of holes in the layer, can only be at low stress, use under the buffing material operating mode; The composite pipe of inlaying rubber and stickup ceramic plate in the steel pipe can't be used in the sharp-pointed operating mode of seriously corroded, high temperature and material shapes.

With both flexibles of single alloy casting and there is the pipeline of wear resistance and corrosion resistance that use is also arranged,, wear-resisting and corrosion resistance is undesirable although this type of pipeline is a cost to sacrifice some toughness and welding performance.

Summary of the invention

The purpose of this utility model provides a kind of composite bimetal pipe, can overcome the defect problem of centrifugal tube easy to leak, easy to crack, wear resistant corrosion resistant difference.

Technical problem to be solved in the utility model is achieved by the following technical solution: a kind of composite bimetal pipe, comprise the cast iron matrix layer, it is characterized in that adopting metal composite structure, skin is the carbon steel structure layer, internal layer is the cast iron matrix layer, and the centre is the melting layer of carbon steel and cast iron metallurgy combination.

The said structure that the utility model adopts because reasonable in design, makes not easy to leak, not easy to crack of composite pipe, and has improved wear-resisting, corrosion resistance.

Description of drawings

Accompanying drawing is depicted as structural representation of the present utility model

Wherein 1, carbon steel structure layer 2, melting layer 3, cast iron matrix layer

Embodiment

By accompanying drawing as can be known, composite bimetal pipe described in the utility model adopts metal composite structure, and skin is a carbon steel structure layer 1, and internal layer is a cast iron matrix layer 3, and the centre is the melting layer 2 of carbon steel and cast iron metallurgy combination.Construction layer 1 adopts centrifugal casting, and material is generally high-strength structure steel such as Q235,16Mn, has comprehensive mechanical performances such as good shock resistance, weldability.Pour into wear-resisting, anti-corrosion material base layer 3 at the 1 cast after coagulation initial stage of construction layer, inside and outside layer 100% is a metallurgy combination.When being used for wear-resisting operating mode, base layer 3 is generally selected rich chromium cast iron, 2 wear-resistant white cast for use, ni-hard cast iron, and as cast condition or corresponding condition of heat treatment, its hardness 〉=HRC55, strengthen 30 times than 16Mn its working life.But if be used for the defeated powder of electric power, ash removal pipe utilization and operation more than 20 years.When being used for anti-corrosion operating mode, base layer 3 is generally selected high silicon acid resisting cast iron etc. for use.Because construction layer, base layer all adopt electric furnace smelting, centrifugal casting, molten steel high purity, consistency height, defective such as pore-free, slag inclusion, is melting layer 2 in the middle of in addition, thereby easy to leak, not easy to crack not, and the solderability of product and decay resistance all are improved.

Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here need not also can't give all mode of executions exhaustive, and these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.

Claims

1. a composite bimetal pipe comprises the cast iron matrix layer, it is characterized in that adopting metal composite structure, and skin is the carbon steel structure layer, and internal layer is the cast iron matrix layer, and the centre is a melting layer.