Metal finishing Q&As since 1989

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Forging

Dear Sir,

We hold a Brass Forging Company, which manufactures Brass Fittings and Turned Parts. We are doing forging since 15 years and we are facing the problem in forging. Our forging procedure is that we heat the brass part in Fuel (Kerosene) and then hot forge it. Once it is forged, the colour of the forged body becomes black and we need to clean the surface by chemical / acidic process. I want to avoid this process for the natural brass colour after the forging. In short it should be same as before forging.

I know that it is due to the lubricant. But not sure which lubricant is suitable for brass, to prevent the nature colour. I doubt whether the material of the forging dye is applicable when it comes to lubrication. Please suggest.

Thanks,

Jacob Ebanezer
forging & turning - Jamnagar , India
2004

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2004

Dear Mr Ebanezer Jacob,

Phosphating is used all over the world as a lubricant for Forging. Find a proprietary chemical supplier from this website to assist you.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

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2005

Dear Sir,
You may try a graphite free lubricant which like boron nitride water base forging lubricant.

Best regards,

Kent Chu
- Taiwan

Water based graphited dispersions are widely used for the lubrication of dies in Brass Forging. Non graphited products also can be used but their performance is somewhat inferior. The change of color of your forged parts is not exclusively responsibility of the lubricant.

Gustavo G.Schiuma
- Sao Paulo, SP, Brazil.
2005

adv.