Crack, or normal casting? |
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Crack, or normal casting? |
74ravenna |
Sep 24 2016, 10:04 AM
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Member Group: Members Posts: 471 Joined: 19-October 14 From: nh Member No.: 18,032 Region Association: North East States |
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veekry9 |
Sep 25 2016, 09:56 PM
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OldMember Group: Retired Members Posts: 3,068 Joined: 17-June 13 From: TO Member No.: 16,025 Region Association: Canada |
https://www.youtube.com/watch?v=AiYnDskFxTo Burning metal! (IMG:style_emoticons/default/blink.gif) VW/Porsche made the Type4 engine from aluminum for it's tensile strength,not for it's 'unflammabilty'. (IMG:style_emoticons/default/dry.gif) Heated magnesium castings to fit interference bearings,circa '70s,did not catch fire back then. Intentionally lit hair-thin magnesium and titanium turnings,and without the added heat of the torch,went out. A puddle of molten magnesium can be lit up with an oxygen rich atmospere and added torch heat. So,yeah,the metal can light up,but,it isn't like it will spontaneously combust. Putting a torch to a casting long enough to melt,will result in a puddle of magnesium on the floor. It would be very difficult to ignite a casting such as the VW cases,the wall thickness and mass too great. Welding the material with ox-ac in the past was a difficult job,no doubt,but quite possible tho. https://www.google.ca/search?q=oxygen-acety...gA&dpr=1.75 https://www.google.ca/webhp?sourceid=chrome...er&start=10 https://www.google.ca/webhp?sourceid=chrome...agnesium+solder https://www.google.ca/webhp?sourceid=chrome...ing%20magnesium https://www.google.ca/webhp?sourceid=chrome...sting+magnesium https://www.google.ca/webhp?sourceid=chrome...e+sand+casting+ https://www.google.ca/webhp?sourceid=chrome...s+burning+metal https://www.google.ca/webhp?sourceid=chrome...e%20ingredients The round spots on the die-cast magnesium engine parts: https://www.google.ca/search?q=ejector+pins...RLODYQQ_AUIBigB / |
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