CN2600211Y

CN2600211Y - Modified tubular granular tungsten carbide welding rod

Info

Publication number: CN2600211Y
Application number: CN 02276138
Authority: CN
Inventors: 雷廷阳; 雷松滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-12
Filing date: 2002-08-12
Publication date: 2004-01-21
Anticipated expiration: 2012-08-12

Abstract

The welding rod of the utility model is that the tubular skin (2) of the original tubular granular tungsten carbide welding rod is uniformly coated with the modified layer; the tubular skin (2) of the original tubular granular tungsten carbide welding rod is first coated with the self-fusing nickel-based alloy powder coating (3) mixed with the bond with the PH from 10 to 11; then the outer surface of the dried self-fusing nickel-based alloy powder coating is uniformly coated with the oxidation-resistant fusing-assistant coating consisting the titanium dioxide, ferromanganese, ferrosilicon, titanium iron, calcite powder and the kaolin mixed by the same bond; after being dried, the device can be used. While welding, the nickel-based alloy is fused and mixed with the 08 steel pipe skin, to change the structure of metal components; the device is good in the flexibility and formation; the welding layer has the enough toughness and hardness.

Description

The modification pipe is adorned granular tungsten carbide filler rod

(1) technical field:

The utility model relates to a kind of welding rod that freezes with oxy-acetylene, and particularly a kind of modification pipe is adorned granular tungsten carbide filler rod.

(2) background technology:

In industries such as oil, mine, building materials, sugaring, for the maintenance production equipment, all need to use in a large number pipe to adorn granular tungsten carbide filler rod and come the big rapid wear workpiece of built-up welding reparation, to improve the case hardness and the service behaviour of rapid wear workpiece or instrument.But, be widely used at present, serve as that the pipe of pipe skin is adorned granular tungsten carbide filler rod when implementing built-up welding with oxy-acetylene flame with 08 steel, tungsten carbide powder does not wherein melt, only be to expect as fibre by the fusing of steel pipe skin, the tungsten carbide fibre is welded on the surface of the work, in the fine weldering process, the tungsten carbide powder only is that the surface is by corrode under the high temperature sintering of oxy-acetylene flame.After solder (promptly managing the molten steel that skin is fused into) had fused into partially carbonized tungsten, the fragility of steel increased, plasticity and toughness reduce, flowability is poor, and internal stress increases, and when the workpiece of postwelding was subjected to impact force action, layer very easily peeled off or be cracked.For example comb is after adorning granular tungsten carbide with oxygen alkynes flame build-up welder and making overcoat the cane knife on the sugar making machine and the end, and it just often falls piece aborning and comes off, and causes the edge of a knife rapid wear and an end comb mouth indentation on the contrary, easilier will press the roller scratch.

(3) content of utility model:

The utility model can be after the public provides convenience kind of built-up welding layer have that enough hardness and toughness, good fluidity, shaping are smooth, pore-free and crackle, adorn granular tungsten carbide filler rod with parent affinity height, novel pipe that anti-impact force is strong.

It is evenly to be coated with the apposition modified layer to make on former pipe is adorned the pipe skin of granular tungsten carbide surfacing electrode that this novel pipe is adorned granular tungsten carbide filler rod, so-called modified layer is to be made of one deck self-fluxing nature nickel-base alloy powder coating and the anti-oxidation cosolvent coating of one deck, promptly adorn on the pipe skin of granular tungsten carbide filler rod at pipe, evenly be coated with apposition self-fluxing nature nickel-base alloy powder coating, on the outer surface of self-fluxing nature nickel-base alloy powder coating, evenly be coated with the anti-oxidation flux coating of apposition.That is be to adorn on the pipe skin of granular tungsten carbide filler rod at pipe, evenly being coated with the apposition pH value is the self-fluxing nature nickel-base alloy powder coating of the adhesive blending of 10-11, after this coating is dried naturally, again after drying on the outer surface of dissolubility nickel alloy powder coating, evenly be coated with apposition (in case Aid for Oxidation flux gross weight is 100) with the blending of the adhesive of pH value 10-11 again: titanium dioxide accounts for 16-22, ferromanganese and accounts for 8-12, ferrosilicon and account for 5-6, calcite in powder and account for 26-30, the remaining anti-oxidation flux coating that makes up for kaolin.

Burn down in the spray of oxy-acetylene flame, low-melting Co-based alloy powder is fusing in advance, and promptly adorns the 08 steel tube skin fusion unification of granular tungsten carbide filler rod with pipe, causes tenors such as nickel in the fine material, chromium to be higher than respective metal content in the general nickel chromium stainless steel.The change of fine material metal ingredient structure, make it not only have the good corrosion resistance of nickel chromium stainless steel, formability and weldability, and outer field anti-oxidation flux coating also can stop molten metal oxidized effectively, and play good wetting action, make the melt metal good fluidity, so that overlay cladding is shaped is smooth, smooth, pore-free and crackle; The fusing effect of the granular tungsten carbide surface of carcass metal pair that dissolves also significantly weakens, overlay cladding can with tight affine the combining together of parent, have fabulous toughness and very high hardness again.

(4) description of drawings:

Fig. 1 is this novel constructional aspect schematic diagram;

Fig. 2 is the A place partial enlarged drawing of Fig. 1, with clear performance constructional aspect of the present utility model.

(5) specific embodiment: pipe has been adorned granular tungsten carbide surfacing electrode since coming out the sixties in 20th century, the basic no change of its structure.Granular carbonization tungsten alloy powder (1) is encapsulated in the pipe skin (2) of 08 steel, and the thickness of pipe skin (2) is 0.6mm.Need the existing unified specification of brand, model of usefulness, on market, all can buy at any time.The used self-fluxing nature Co-based alloy powder of the utility model also is an existing product on the market.Coating weight from dissolubility nickel-base alloy powder coating (3) preferably can reach the 7-10% that pipe is adorned granular tungsten carbide filler rod weight; Or the 25-30% of pipe tare weight amount.The used adhesive kind of self-fluxing nature nickel-base alloy powder coating is not limit, as long as its pH value all can use at 10-11.When being coated in after self-fluxing nature nickel-base alloy powder coating (3) on pipe skin (2) dries naturally, evenly be coated with again and apply anti-oxidation flux coating (4), the adhesive of use must be identical with the used adhesive of self-fluxing nature nickel-base alloy powder coating.This coating preferably can be continuous, fine and close, do not come off in transportation and use with protection self-fluxing nature nickel-base alloy powder coating (3).After treating that anti-oxidation flux coating (4) is dry, even new type of electrode comes into operation.

Claims

1, a kind of modification pipe is adorned granular tungsten carbide filler rod, it is evenly to be coated with the apposition modified layer to make on pipe is adorned the pipe skin (2) of granular tungsten carbide filler rod, it is characterized in that: described modified layer is to be made of self-fluxing nature nickel-base alloy powder coating (3) and anti-oxidation flux coating (4), adorn at pipe on the pipe skin (2) of granular tungsten carbide filler rod, evenly be coated with apposition self-dissolving nickel-base alloy powder coating (3), on the outer surface of self-fluxing nature nickel-base alloy powder coating (3), evenly be coated with the anti-oxidation flux coating of apposition (4).

2, modification pipe according to claim 1 is adorned granular tungsten carbide filler rod, it is characterized in that: the weight of self-fluxing nature nickel-base alloy powder coating (3) is the 7-10% that pipe is adorned granular tungsten carbide filler rod weight; Or the 25-30% of pipe skin (2) weight.