December 8, 20205 yr Can you tell me the source of your information on quench cracking based on overly aggressive agitation below? On 3/11/2019 at 7:19 AM, IronAlchemy said: Sad to see a good tool crack. Edited December 8, 20205 yr by Mod30 Remove excessive quote.
December 8, 20205 yr Author Temperature only? I would like to know more about the cause and effect of different agitation rates... Some reading I am doing: https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.522.9535&rep=rep1&type=pdf https://www.houghtonintl.com/sites/default/files/resources/article_-_advances_in_quenching.pdf http://www.getottenassociates.com/pdf_files/6072_0192_224_web.pdf Edited December 8, 20205 yr by Mod30 Remove excessive quote.
December 8, 20205 yr Did you read the ASM Handbook on Heat Treating? They discuss quenchants and forms of agitation in detail.
December 8, 20205 yr Author Yes; just haven't found the detail about agitation. Edited December 8, 20205 yr by Mod30 Remove excessive quote.
December 8, 20205 yr Besides moving the piece there should be references to pumped quenchant and bubbled quenchant. Of course the old blacksmithing books mention moving the workpiece up and down to avoid a water line crack; but they were using simpler alloys.
December 27, 20205 yr Cooling rate determines the as quenched microstructure which in term strongly influences the stresses generated. Agition can increase or decrease cooling rate depending on how agressive it is. The are many other factors that influence quench related cracking such as part geometry so you really have to consider them all together if you are trying to prevent cracks.
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