CN2602832Y - Brass soldering type bush block - Google Patents

Abstract

The utility model relates to a brazing welded tile, in particular to an anticorrosive wearing braze welded tile of a horizontal screwing unloading tile type sedimentating centrifuge. The compound layers structures of the utility model in sequence are as below: a wearing piece, i.e. igatalloy; brazing filler metal, i.e. silver brazing filler metal with the silver proportion of 45 percent to 60 percent; tile back, i.e. stainless steel. The brazing welded tile of the utility model has high wearing resistance, which can ensure the tile dose not drop during the set working time. Changing the tile of the imported machine prolongs the service life 2 times to 3 times while compared with the original design and the overhauling charge is only 1/4 to 1/3 of the overseas overhauling charge, which greatly saves the foreign exchange. The brazing welded tile of the utility model can not only be used for the examining and replacing of the imported device, but also provides the technical guarantee for developing the domestic horizontal screwing unloading tile type sedimentating centrifuge.

Description

A kind of braze welding type tile fragment

Technical field

The utility model relates to a kind of braze welding type tile fragment, anticorrosion, the wear-resisting braze welding type tile fragment that uses on particularly a kind of horizontal screw unloading tile fragment formula sedimentation centrifuge.

Background technology

Horizontal screw unloading tile fragment formula sedimentation centrifuge from the eighties in 20th century successively by entering Chinese market abroad, bring into use in fields such as sewage disposal, kaolin, oil-refining chemicals, effect is remarkable, has obtained domestic user's favorable comment.The tile fragment of, wearability anticorrosion for having, the shape of tile fragment is very unimportant comparatively speaking, its key is because its use that need be combined with each other by the sheet layer material of unlike material, so its unlike material and complex method will directly influence the quality and the life-span of tile fragment.Having that tile fragment on the horizontal screw unloading tile fragment formula sedimentation centrifuge is common is adhered, braze welding type etc.Adhered is that watt back of the body and abrasionproof spare are composited with bonding agent, and braze welding type then is to be composited by brazing mode, and has adopted compensating plate between watt back of the body and the abrasionproof spare.The former is not because bonding firm between watt back of the body and the anti-abrasive disc, comes off easily and has limited purposes.The horizontal screw unloading tile fragment formula sedimentation centrifuge braze welding type tile fragment composite bed structure of present domestic introduction is followed successively by anti-abrasive disc---steel bonded carbide, the silver-base solder of solder---argentiferous 10～30%, compensating plate---copper sheet, the silver-base solder of solder---argentiferous 10～30%, watt back of the body---stainless steel, because selected steel bonded carbide in the tile fragment composite bed, this kind of silver-base solder structure of low silver content, therefore in use wearability is not high, though adopt compensating plate between watt back of the body and the abrasionproof spare---copper sheet, can reduce the cracking of abrasionproof spare, but because weld layer increases, cause welding quality to descend, anti-abrasive disc comes off, and this is that device security is unallowed.Maintenance is professional is in addition monopolized by external producer, has further improved the cost of import machine.

Summary of the invention

The purpose of this utility model is to provide a kind of braze welding type tile fragment, by improving tile fragment composite bed inner materials structure, improves the wearability of braze welding type tile fragment, improves tile fragment service life, promotes the production domesticization of horizontal screw unloading tile fragment formula sedimentation centrifuge.

The composite bed of the utility model braze welding type tile fragment structure is followed successively by abrasionproof spare---W-Co kind carbide alloy, solder---mass fraction of silver is 45～60% silver-base solder, watt back of the body---stainless steel.Because selected W-Co kind carbide alloy makes tile fragment have more wearability than existing braze welding type tile fragment in the tile fragment composite bed.Because abrasionproof spare is the W-Co kind carbide alloy, therefore require solder need satisfy certain condition.The fusion temperature of finding solder in the experiment is too high, because the difference of two kinds of materials, the difference of the coefficient of expansion causes the carbide alloy cracking easily; The fusion temperature of solder is low excessively, then can influence weld strength, reduces service life.Behind the corresponding silver-base solder of choosing high silver content, anti-abrasive disc and the different tension force that cause of watt back of the body have farthest been reduced because of the coefficient of expansion, make its plyability very good, welding is more infirm having under the situation of compensating plate, improve the service life of braze welding type tile fragment widely, simplified technical process.The utility model recommends preferably to use the silver-base solder of fusion temperature greater than 700 ℃ argentiferous 45～60%.

W-Co kind carbide alloy described in the utility model is as being YG6, YG8, YG10 etc.; Silver-base solder can be SHL303, SHL304 etc.; Stainless steel can be ferritic stainless steel, martensitic stain less steel, austenitic stainless steel, austenite---ferritic stainless steel and precipitation-hardening stainless steel etc.Under specific use, be also can add compensating plate---copper sheet in the solder between the W-Co kind carbide alloy of the utility model braze welding type tile fragment and the stainless steel, formation is anti-abrasive disc in proper order, and---------the stainless composite bed of copper sheet, solder---silver-base solder of argentiferous 45～60%, watt back of the body---is constructed for the silver-base solder of argentiferous 45～60%, compensating plate for W-Co kind carbide alloy, solder.

The utility model braze welding type tile fragment, can make single anti-abrasive disc braze welding type tile fragment, two anti-abrasive disc braze welding type tile fragment as shown in Figure 1 and Figure 2, be arranged in order on the spiral that is weldingly fixed on screw feeder using braze welding type tile fragment of the present utility model, promptly form a complete helix pusher, as shown in Figure 5.The utility model braze welding type tile fragment also can be applicable to the material transmission with having on the tile fragment formula blade of wear-and corrosion-resistant function except being applied on the above-mentioned horizontal screw unloading tile fragment formula sedimentation centrifuge.

Description of drawings

Fig. 1 is the anti-abrasive disc braze welding type tile fragment external view of a kind of list of the present utility model, Fig. 2 is a kind of two anti-abrasive disc braze welding type tile fragment external view of the present utility model, Fig. 3 is a kind of braze welding type tile fragment cutaway view of the present utility model, Fig. 4 is a kind of braze welding type tile fragment cutaway view of prior art, wherein 1---anti-abrasive disc, 2---watt back of the body, 3---solder, 4---compensating plate.Fig. 5 is the screw feeder external view.

The utility model braze welding type tile fragment has very high wearability, can guarantee that in the running time of regulation tile fragment does not firmly come off.Carrying out on the P-2000 horizontal screw unloading tile fragment formula sedimentation centrifuge that Sweden Alfa Laval company produces after the tile fragment substitute uses, improve 2～3 times than former design service life, and recondition expense only is external 1/4～1/3, has saved foreign exchange greatly.The utility model braze welding type tile fragment not only can be used for maintenance, the replacement of import equipment, and provides technical guarantee for the exploitation of homemade horizontal screw unloading tile fragment formula sedimentation centrifuge.

Claims (4)

1. braze welding type tile fragment, can be arranged in order on the spiral that is weldingly fixed on screw feeder, it is characterized in that its composite bed structure is followed successively by abrasionproof spare---W-Co kind carbide alloy, solder---mass fraction of silver is 45～60% silver-base solder, watt back of the body---stainless steel.

2. braze welding type tile fragment according to claim 1, the fusion temperature that it is characterized in that silver-base solder is greater than 700 ℃.

3. braze welding type tile fragment according to claim 1 is characterized in that stainless steel can be ferritic stainless steel, martensitic stain less steel, austenitic stainless steel, austenite---ferritic stainless steel, precipitation-hardening stainless steel.

4. braze welding type tile fragment according to claim 1 is characterized in that accompanying copper sheet in the silver-base solder layer.

Images