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i've got some questions to answer but im stuck on one it is as follows:Sketch and describe the structures in the weld and parent metal for steel at the following conditions:i) at the maximum temperature during welding;ii) after cooling of a steel of low hardenability;iii) after cooling of a steel of high hardenability.any ideas?thanks
Reply:Start by taking a look in the 'welding metallurgy' section of ASW "Weling Handbook", vol 1. Many libraries have it.
Reply:Originally Posted by beckyi) at the maximum temperature during welding;
Reply:It sounds like someone wants their homework done for them. John - fabricator extraordinaire, car nut!- bleeding Miller blue! http://www.weldfabzone.com
Reply:thanks very much Tensaiteki, thats a HUGE help Originally Posted by MicroZoneIt sounds like someone wants their homework done for them.
Reply:The temp of the arc is about 6500 degrees. Lincoln welding hand book.DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Originally Posted by David RThe temp of the arc is about 6500 degrees. Lincoln welding hand book.
Reply:Originally Posted by enlpckStart by taking a look in the 'welding metallurgy' section of ASW "Weling Handbook", vol 1. Many libraries have it.
Reply:thanks for all the help.i came across this :
Reply:Becky it is interesting that your assignment would be specific to the automotive industry! Is that because they use different metal that is more affected by heat? I know that the HSLA (high strength low alloy) steels used in the structure of modern vehicles since the early 80s require a very specific welding method!
Reply:Originally Posted by WoodStoneSteelBecky it is interesting that your assignment would be specific to the automotive industry! Is that because they use different metal that is more affected by heat? I know that the HSLA (high strength low alloy) steels used in the structure of modern vehicles since the early 80s require a very specific welding method!
Reply:Out of curiosity, what flavor of degree are you going for? You are at th perfect time in your life to pick up as many reference books as you can that are relevant to your field. Sounds weird, but student pricing can't be beat on a lot of books. (I remember when I picked up my CRC handbook. $10 through the school, was a LOT more otherwise)
Reply:I would have elected to "punt"......Lincoln 3200HD MIGLincoln AC/DC 225 Stick
Reply:Becky -- please come back and let us know how you did!
Reply:hello guys, not had it back yet so cant let you know yet :Pim doing a mechanical engineering degree for those that were interested, im in my second year now (just started my exams) and have a years work placement starting on the 2nd july, they make welded tubes at the place i am going to so you never know i may be back with more exciting(?) questions!i will be back to let you know how i do unless i did rubbish hehe
Reply:check out an iron carbon continous cooling diagram, it will tell you the grain structure at each temperature for varying amounts of carbon in steels |
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发表于 2021-9-1 00:57:43