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Heating rate effect 1

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ckiyak

ckiyak

Materials
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Oct 25, 2017
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Is there any crucial effect of heating rate in solution or aging process for precipitation hardenable alloys ?
 
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Not that I have seen or reviewed. Typically, heating and cooling rates are specified to avoid formation of harmful thermal stresses that can result in locally severe distortion and/or cracking.
 
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metengr made the point. If you material is hard (>35HRC) before Heat treatment, it is recommended to pre-heat to 1000-1200F, then heat to over 1300F to prevent damage (cracking, warpage etc.). If HT machined parts, especially for those with a big cross section area change, it is always a good practice to do a preheat.
 
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