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MicroMIG Pictures


MicroMIG repairs can be made right next to sensitive braze joints without harming the braze material or delicate honeycomb. The slash face on this vane segment was undersized by about 0.010". When the MicroMIG repaired slash face was re-machined, it was back up to print dimension and went into service.

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In this typical aerospace application, a casting defect was found in an expensive component. The defect was blendout out and the "unweldable" IN713LC material was MicroMIG repaired.

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This is an extremely tough application for any process other than MicroMIG. This material is "unweldable" IN738, the leading edge of this airfoil must be repaired back to the original moldlines of the part, the repair must pass all aerospace X-ray, FPI, and ultrasonic examinations, and the repair must perform in service as if it was original material. We have MicroMIG repaired 1000's of these leading edges that have all performed flawlessly in service!

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Here is another almost impossible repair for any process other than MicroMIG. This is a finished aerospace component that has been machined to tolerances of only +/- 0.002" in this area. The Locating Slot feature on this component was mis-machined (out of location) by a few thousandths. This material is actually TIG weldable from a metallurgical viewpoint but TIG welding would have distorted this part far more than the +/- 0.002" tolerance the slot has to hold. Enter MicroMIG! We repaired the slot with zero distortion! We then sent it back to our customer for remachining ... this time in the correct location. This pic shows the slot after welding but before re-machining it in the correct location.

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Here is yet another almost impossible repair for any process other than MicroMIG. This finished aerospace component has a series of holes into which certain fasteners must "press fit". This part had a few holes that were too big (by only about one and one-half thousandths) due to a tool holder not being quite tight enough thus allowing a bit of tool wobble. Not only was this material an "unweldable" alloy but TIG welding would have distorted the thin flange out of tolerance anyway regardless of the material's weldability. Once again, MicroMIG saved the day! We repaired the holes with zero distortion and sent the part back for re-machining to the correct hole size. The "press fit" fasteners now really did press fit instead of falling out and the part went into service. The cost of this repair was only pennies on the dollar when compared to making a new part.

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Both of the above pics show repairs that even in weldable materials are extremely difficult for all but the best TIG welders using the most modern equipment. Throw into the mix the "unweldability" of some aerospace super alloys and you have an impossible repair ... except for MicroMIG! The repair of Thru Holes and Cut Backs on the thin trailing edge areas of today's turbine engine hardware has been a reality for many years at MicroWeld Engineering, Inc. Our MicroMIG process has repaired hundreds of trailing edge cut backs, thru holes near trailing edges, and fillet radius cutouts at or near the trailing edges of components made of "unweldable" alloys.

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This "unweldable" vane segment had it's locating slot mis-machined out of position. This part was MicroMIG repaired, sent back for re-machining, and is shown here in the finished condition ready to go into service. There is virtually no evidence of any repair taking place here. This is MicroMIG's greatest asset. It's ability to repair a component back to true original condition without distortion, metallurgical damage, or the destruction of the original heat treated condition. If you have an MRB group, they should be using MicroMIG to salvage your company's expensive hardware. The only other choices are scrapping the part or settling for a lower quality repair.

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If you have an MRB group, they should be using MicroMIG to salvage your company's expensive hardware. The only other choices are scrapping the part or settling for a lower quality repair.

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