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Smelting Kovar

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    Smf-retired-user-0043 started this thread.
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    Quote Originally Posted by jiffy117 View Post
    Alloy, I have watched a few videos of casting with sand and sodium silicate and cured with CO2. Usually they make cores this way as they are much stronger than green sand. I don't believe it is re-usable after casting though, is it? I have heard auto aluminum is much better as its a higher grade. I have a set of aluminum rims, only trick is to get it into workable pieces. Glad my flame is usable, was my first burn after some modifications. Thinking of building a second burner using forced air (blow dryer..). Maybe I'm just a pyro and wont even get to the casting part! ha Anyways, I'll be sure to follow you, and I know who to bug if I run into issues
    Silica sand blended with sodium silicate cured with Co2 is most commonly used to make cores but may also be used for general casting. For the backyard foundry the sand used would be written off as a consumable.

    Here is an article on how the larger foundry's reclaim chemically bonded sand for reuse, Considerations for Reclaiming Chemically Bonded Sand | Feature content from Foundrymag

    Auto aluminium was my preference,



    Aluminium used in the manufacture of outboard engines contains copper to hinder corrosion.

    Deltalloy is used to manufacture items that require resistance to abrasion, for example automotive transmissions, AC and power steering pumps and misc hydraulic and water pumps.

    If you were going to cast a lapping plate to make your own vibratory flat lap your best choice would be to use Deltalloy.

    It makes me ill when I hear of someone using extruded aluminium or beer and pop cans for castings, if and when you get serious about your hobby be sure to invest in proper crucibles as those homemade iron jobs will contaminate.the metal being melted.

    If you were refining gold and silver you would not use a crucible previously used to melt silver to do the final melt of your gold and expect to get a .995 button.



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    Smf-retired-user-0043 started this thread.
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    Edelbrock a well known name in racing circles and street performance enthusiasts started with a home foundry working out of his garage in California.

    I could only wish to achieve the knowledge and craftsmanship of this Australian dude who reverse engineered an Austin Healey engine block to make patterns and cores to reproduce the original iron block in aluminium. http://healeyfactory.com.au/dmd/deve...attern-making/

    Palmer another back yard foundry-man started out casting fishing weigh molds who eventually grew the company into a foundry equipment manufacture.

    With the the recent arrival of 3D printing arriving to the playing field there will be no limitations placed on man or woman ( newattitude ) of what the future holds for the human race.

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