DerekAnaya Posted March 7, 2014 Share Posted March 7, 2014 I'm sorry if this is somewhere else, but I am quite interested in the properties of platinum from a forging perspective... ( I know its ridiculously expensive. 13 kilos = 690k dollars. ) Anyone know anything? Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted March 7, 2014 Share Posted March 7, 2014 Cold forging or hot forging? Quote Link to comment Share on other sites More sharing options...
DerekAnaya Posted March 11, 2014 Author Share Posted March 11, 2014 Either one is fine. I just want to know any tips if any. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted March 11, 2014 Share Posted March 11, 2014 The ASM Metals Handbook, Desk Edition has about a page on the working of Platinum mention it's high ductility saying that it can be reduced by 98% by rolling or wire drawing with slow increase in work hardening---chart provided. It mentions being careful to avoid contamination of the surface through contact with iron and that that may cause cracking. Wire drawing of platinum and platinum alloys is done almost exactly like copper. I would check Oppi Untracht's "Metalworking Techniques for Craftsmen" as well. Unfortunately my copy is at the other house. Quote Link to comment Share on other sites More sharing options...
DerekAnaya Posted June 19, 2015 Author Share Posted June 19, 2015 Thank you very much! Quote Link to comment Share on other sites More sharing options...
Foundryman Posted February 16, 2018 Share Posted February 16, 2018 I just came across this video on youtube where they're forging platinum ingots with a power hammer and thought some here would find it interesting. This has to be by far the cleanest power hammer you'll ever see! The forging is at 4minutes 20 seconds but I found the entire video pretty interesting. Quote Link to comment Share on other sites More sharing options...
c.costabile Posted April 3, 2020 Share Posted April 3, 2020 Hi Derek, Not sure if you found the information you were seeking. I have forged platinum ingots (about 6kg ingots for manufacture of plate, and 4kg ingots for manufacture of rod). Things you need to do: Ensure you're using the correct forging temperature, clean your die sets and ram surfaces, use clean tongs, multiple heating operations are required. Depending on the alloys you forge, your minimum forging temperature should be about 1200 degrees C. If you go hotter, its better as you further initiate the production of fine grains through dynamic re crystallization, coupled with severe plastic deformation. If you're thinking of forging platinum iridium alloys (in particular anything over 20%) you must be aware that a minimum forging temperature of 1500 degrees C is used; If not you run the risk of creating central busts in your bar/sheet, which will ultimately lead to failure of components manufactured. Platinum is a great conductor of heat, so you need to hammer quickly whilst its losing heat. IF your hammer is large enough, you will get heat generation within the bar. We use a 150kg hammer and even with preheating of die sets, we still seem to lose heat quickly. So because platinum is a great conductor of heat and very plastic, you will quickly pickup some trace amounts of steel on the surface. The cleaner your anvil and hammer head is, the less pickup you will get. Also keep your tongs cleaned for the same reason. If you have any further questions, do not hesitate to ask. Best Regards, Chris shown below is a preform in PtIr20% alloy Quote Link to comment Share on other sites More sharing options...
Irondragon Forge ClayWorks Posted April 3, 2020 Share Posted April 3, 2020 Hope someone else can use the info because Derek hasn't been here since November 2015. BTW, are you in Melbourne Florida or Down Under? Quote Link to comment Share on other sites More sharing options...
c.costabile Posted April 3, 2020 Share Posted April 3, 2020 Melbourne Australia Quote Link to comment Share on other sites More sharing options...
Irondragon Forge ClayWorks Posted April 3, 2020 Share Posted April 3, 2020 I thought so but wanted to check, we have family in Florida. Have you seen this? A great bunch down your way. OZ roll call - Everything Else - I Forge Iron Quote Link to comment Share on other sites More sharing options...
c.costabile Posted April 3, 2020 Share Posted April 3, 2020 Hey, thanks! I haven't seen this, but will have a look. Cheers! Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted April 3, 2020 Share Posted April 3, 2020 I, for one, love to read info like this from folks who have actually worked the stuff! I strongly doubt I will ever work anything more pricey than silver or more exotic than Titanium; but if I do I know where to go to get info! Quote Link to comment Share on other sites More sharing options...
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