Matters to be noted when polishing forgings

Release time:

2024-01-19 09:43

A good polishing surface for forgings should be clean, bright and flat. However, poor polishing often results in a number of polishing defects, the common ones being: pockmarks, contamination spots, scratches, trailing and shedding of non-metallic inclusions. If such defects occur, it is necessary to re-polish the sample.

In order to obtain a good polished surface, or the preparation of photographic specimens, in the various processes to pay attention to the following aspects.

Forgings

When rough and fine grinding is carried out in the forging plant, a thinner abrasive should be used, with the aim of ensuring that the ground specimen surface has the finest and lightest channel marks.

They should be carefully rinsed clean between passes.

Polishing flannel should be kept free of dust and sand particles, etc., and can be rinsed for a period of time with tap water without sand particles.

Non-metallic inclusions trailing and shedding is mainly due to excessive pressure when polishing, polishing fluid is too thick, polishing time is too long, polishing discs rotate fast and other reasons, so polishing should be especially careful, slowly rotating the specimen for polishing can be eliminated trailing phenomenon.

When the specimen appears numbness, usually caused by too long polishing time.

Forging

For water stained specimens, there can be water lightly thrown to remove water stains, for cracked specimens, after polishing to lengthen the blowing hot air time, if necessary, after rinsing with water, the forging specimen into the anhydrous ethanol for several minutes, and then blow-drying, so that you can avoid seepage contamination of the specimen surface on both sides of the cracks.

The force at the end of each polishing should be small, lest new scratches or trailing phenomenon.

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What are the characteristics of forged machined forgings?

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Matters to be noted when polishing forgings

A good polishing surface for forgings should be clean, bright and flat. However, poor polishing often results in a number of polishing defects, the common ones being: pockmarks, contamination spots, scratches, trailing and shedding of non-metallic inclusions. If such defects occur, it is necessary to re-polish the sample.

What are the characteristics of forged machined forgings?

Forging plant forging products are plastically deformed through forging processing, forging processing is the use of external forces to produce plastic deformation of the raw material forging, to obtain the required size, shape and performance of the forging blanks or parts of the processing method.

What are the trends in forging?

Mainly to improve their mechanical properties (strength, plasticity, toughness, fatigue strength) and reliability. This requires better application of the theory of plastic deformation of metals; application of materials with better intrinsic quality, such as vacuum-treated and vacuum-smelted steel;

What are the contents of quality inspection of forgings?

The existence of forging defects, some will affect the quality of subsequent processes or processing quality, some seriously affect the performance and use of forgings, and even greatly reduce the service life of manufactured parts, endangering safety.

Why are there white spots on forgings?

Usually the heat treatment of large forgings is combined with the cooling of the forgings with each other, due to the large cross-section size of large forgings and the complexity of the production process.

What is meant by decarburisation during heating of forgings?

Forging to pay attention to a lot of things, but not every item to pay strict attention to, forging heating process decarburisation is what it means? The following article is mainly to tell you.