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Posts Tagged ‘welding’

Forge Welding:

August 4th, 2008 No comments

Forge welding is the oldest known welding process which has been practiced for centuries. The procedure is still used even though its application is limited because of the certain complexity connected with it.

Metals which can be Forge Welded:
Wrought iron and low carbon steels (with C content less than 0.2%) can be acceptable forge welded. Forge welding can be accepted out with metal thicknesses up to about 30 mm.

Surface Preparation:
Surfaces of the metal parts to be forge welded are prepared by upsetting the pieces at the ends. A variety of edge preparations necessary to be carried out previous to forge welding.

Procedure for Forge welding:
The parts to be forge welded are given an edge (or joint) preparation as clarified above. Then, the parts are heated to over l000°C until they are plastic. In this state, the parts are positioned on the anvil end to end and are hammered jointly, either using a power hammer or physically, until they form a solid structure of metal.

In forge welding process, a very significant requirement is that during heating the absorption of sulphur from the coke of the fire and scaling of the pieces (to be welded) ought to be prevented or that if scale is created, the hammering should be completed in such a way as to squeeze this out of the joint and allow metal to metal contact. Besides being combined by blows from a hammer, the work¬ pieces may also be welded by being rolled, drawn or squeezed together.

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Categories: Tig Welding Tags: ,

Tips for Overhead Tig Welding:

August 4th, 2008 No comments

Following are the major pointers for learn how to tig welds overhead using the walk the cup method…

1. Enlarge the electrode far sufficient to have the correct torch angle.

2. Maintain the electrode sharp and if it gets crapped up, sharpen it or exchange to a sharp one.

3. A flex head welding torch assists for getting the torch body far sufficient away from the hot metal.

4. Maintain a tight arc…concerning same as electrode diameter used or tighter.

5. For welds on thicker metal, use several passes.

6. The lay wire method is popular, but dipping the rod is better for ensuring diffusion in the root pass.

7. If you dip, maintain the hot tip of the rod shielded with the argon as of the tig cup.

8. A gas lens works extremely well but is not forever essential.

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Categories: Tig Welding Tags: , ,

EBW (electron beam welding) Repairing a casting out of use:

August 2nd, 2008 No comments

regular welding would not be a satisfactory solution. But electron beam Welding a spare socket in place, though expensive, may recover the cost has already invested in the finished piece and discarded.

Welding up a sleeve replacement the procedure is possible:

• exact focusing of the beam on top of the joint, despite the distance,
• the introduction of small amount of heat, avoiding the prey of mechanical properties and prevention of elbow intolerable
• creating a thin and deep, located exactly welding sewing,
• avoid required for processing heat frequent
• allow thorough non-destructive testing, to be eligible for repair,
• to be executed within the shortest period of performance limiting in providing replacement of part.

Tips for Welding Supplies:

July 31st, 2008 No comments

Mig welding supplies:

Mig welding stands for metal inert gas welding and when selecting which mig supplies to stock, you must forever look out for well known, excellence brands. Gears such as portable welders (like the Everlast Power I-MIG 160 mig welder) are good to contain in stock as these welders are simple to move, perfect for automotive work and are user friendly, making them huge for beginners. To make sure all your customers are catered for you can also stock specialized, top of the range mig welding supplies together with Inverter Welding Supplies welders. Including these in your range will appeal to the much experienced customers who insist ultra high spec gear to complete the job.

Tig welding supplies:

Tig (tungsten inert gas) welding supplies are supposed to also feature in your stock list as this gear is used by expert welders such as those working in the aerospace field. Tig supplies can be very powerful so as a result they do be inclined to be luxurious but investing in excellence machines from brands Tokentools will make sure your customers receive excellent value for money.

It is significant to cautiously choose excellence welding equipment for your customers to be assured of its reliability and value for money. If you want to stock high class welding equipment then contact Tokentoolsgenerators.

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Categories: Tig Welding Tags: , ,

Explosive Welding – Advantages and Disadvantages:

July 30th, 2008 No comments

Explosive Welding Advantages:

(i) Ease of the process.
(ii) Extremely big surface can be bonded.
(iii) Welds can be created on heat-treated metals with no affecting their microstructures.
(iv) This foils can be bonded to heavier plates.
(v) Broad range of thicknesses can be explosively clad jointly.
(vi) Explosive bonds have a solid condition joint that is free from warmth affected zone.
(vii) Good explosive bonds typically contain strength equal to or greater than that of the weaker of the two metals joined.
(viii) Lack of porosity, phase changes and structural changes communicate improved mechanical properties to the joints.

Explosive welding Disadvantages:

(i) In industrial areas the use of explosives will be harshly limited by the noise and earth vibrations caused by explosion.
(ii) The rules relating to the storage of explosives and the difficulty of preventing them from falling into unauthorized hands can well prove to be the major obstruction to the use of explosive welding.
(iii) A limitation to explosive cladding is concerned with the fragility of the alloys. Metals to be bonded by this procedure must possess some ductility and some crash resistance. Metals harder than about 50 RC are tremendously hard to weld.
(iv) Metal thicknesses bigger than 62 mm of every alloy cannot be joined simply and need high explosive loads.
(v) Resources such as beryllium, tungsten, boron, glass and ceramics are not usually processed by explosive welding.

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