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As the title says. My friend told me it makes the weld stronger if you blow it off with compressed air right after welding is this true? Anyone heard of it? It would also lower the HAZ area I think. Thanks.
Reply:I know it cracks manganese castings that have been welded. Im talking a fan. Not even compressed air. Not good practice bud.I hate being bi-polar it's awsomeMy Heroes Have Always Been Cowboys
Reply:How about steel tho? Bad idea?
Reply:I haven't tried it
Reply:Not usually a good practice. Iv'e seen root passes crack doing that.
Reply:probably works as good as pouring water on it!
Reply:70,000 psi not strong enough for you?
Reply:It will not make a weld stronger.Ranger 250 GXTSmith Gas Axe
Reply:There is no magic bullet. There are thousands of different steel alloys and weldment configurations and quenching/heat treatment is a science. If you blew off your buddy's advice, it might make you a stronger welder.Now, if he is a toolmaker and longtime blacksmith, I might be inclined to listen to what he has to say. But barely.Last edited by Oldendum; 01-24-2015 at 04:49 PM."USMCPOP" First-born son: KIA Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:Usually the faster steel cools the harder it is,if you cool some types of steel too fast, they end up hard and as brittle as glass.Just let it cool at its own rate.
Reply:Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:@ motolife313 - negative ghost rider, the pattern is full. No way to reduce the HAZ after the weld heat has already altered the parent metal at an atomic level. No way. Order a copy of this key JFL reference to advance your welding professional development: http://www.jflfoundation.com/Product...roductCode=MHW. Compressed air for stronger welds? No way. Leave the weld strength task up to the elements in the filler combining with the base material, and from applying proper techniques/practices DURING the weld."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Mild steel simply does not respond to heat treatment, plain and simple. Nothing to gain, lots to lose. 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:The single time I have seen the instruction to cool someting with compressed air immediately after welding was in instructions for making low cost lathe tools. You would take a piece of cheap steel, grind a "corner" off, build it back up with high speed steel filler, and then cool it down to give it some sort of simple hardening. After grinding it into a cutting edge you had a brand new HSS lathe tool, made out of 99% dirt cheap steel and 1% expensive HSS filler rod, instead of using a big piece of expensive HSS - a waste of good material since only the cutting edge needs to be HSS.
Reply:Ghetto, really ghetto. Unless my tooling broke at the side of the road, more money would be wasted in time, welding gas and grinding wheel than a $10 piece of HSS.When a welder tells you to "stick it", what do they really mean?"In a time of universal deceit, telling the truth is a revolutionary act." - George Orwell
Reply:Well... It's out of a welding book from 1964. Something tells me labour has gone up and materials has gone down quite a bit in 50 years. Back then it probably made financial sense - or it was a way around waiting for new tooling.
Reply:I was taught cooling down most steel too quickly could create microscopic cracks. I know that "quenching" in hot oil to a certain degree and color of heated steel hardens to an extent.
Reply:file that one next to the myth that welding with contacts will sear them to your eyeballs.i.u.o.e. # 15queens, ny and sunny fla
Reply:Originally Posted by motolife313As the title says. My friend told me it makes the weld stronger if you blow it off with compressed air right after welding is this true? Anyone heard of it? It would also lower the HAZ area I think. Thanks.
Reply:My friend is a jack of all trades!he said warriors back in the day when they were making there sowrds would after getting them hot and hammering on them would get on the fastest horse and move around the sowrds really fast. He said the molecules go to the out side but the inside will be a little softer.
Reply:We are not in the middle ages anymore, and I would not suggest doing a hole shot out of your driveway while waving a sword out the window while doing 90 down the road to heat treat it. Rockwell testing and experimenting is your best friend brother.I hate being bi-polar it's awsomeMy Heroes Have Always Been Cowboys
Reply:Originally Posted by motolife313My friend is a jack of all trades!he said warriors back in the day when they were making there sowrds would after getting them hot and hammering on them would get on the fastest horse and move around the sowrds really fast. He said the molecules go to the out side but the inside will be a little softer.
Reply:Lol. What is Rockwell testing? I'm always up for tests!!!
Reply:Originally Posted by motolife313Lol. What is Rockwell testing? I'm always up for tests!!!
Reply:Originally Posted by OscarYou have much to learn, young grass-a-hoppa! Google is your friend. And stop listening to old-wives tales from "jack of all trades".Originally Posted by docwelderfile that one next to the myth that welding with contacts will sear them to your eyeballs.
Reply:I'm not super worried about being book smart
Reply:Originally Posted by motolife313My friend is a jack of all trades!he said warriors back in the day when they were making there sowrds would after getting them hot and hammering on them would get on the fastest horse and move around the sowrds really fast. He said the molecules go to the out side but the inside will be a little softer.
Reply:Originally Posted by motolife313My friend is a jack of all trades!he said warriors back in the day when they were making there sowrds would after getting them hot and hammering on them would get on the fastest horse and move around the sowrds really fast. He said the molecules go to the out side but the inside will be a little softer.
Reply:Originally Posted by SandyYou were supposed to quench it in the blood of the enemy,,, or something like that. Any way, it wouldn't take much of that riding and waving chit before the horse would get embarrassed and sneak off.
Reply:Originally Posted by motolife313I'm not super worried about being book smart
Reply:Originally Posted by MinnesotaDaveYou won't even read the responses of the people you asked the question of.Likely in no danger of reading a book.
Reply:Originally Posted by motolife313Lol. What is Rockwell testing? I'm always up for tests!!!
Reply:Maybe I could test with my rifle lol
Reply:CAN OF WORMS: has anyone ever used an air driven jitterbug (pneumatic descaler) to clean a weld?Last edited by Dale Salisbury; 01-24-2015 at 10:51 PM.Some kind of Big Blue constant current welding machineAnother smaller yet, Blue machine (it's got wire in it)
Reply:Originally Posted by docwelderfile that one next to the myth that welding with contacts will sear them to your eyeballs.
Reply:Originally Posted by motolife313As the title says. My friend told me it makes the weld stronger if you blow it off with compressed air right after welding is this true? Anyone heard of it? It would also lower the HAZ area I think. Thanks.
Reply:motolife313Fortunately: 'I don't have a dog in the fight', otherwise everyone would be PO'd.Occasionally: when TIG repairing delicate assemblies that cannot be taken apart, I use air 'nozzles/jets' to cool adjacent sections that cannot suffer heat.I don't cool the weld or HAZ with air, only the conductive sections for protection of sensitive components.Opus
Reply:That's also what I was thinking blowing the wrist pin off and maybe not so much the weld. And mike I can watch the part spreading the heat up to 20 sec or more after welding with my mask up. When I welded that lap joint at 80 amps in that thread I made couple weeks ago it took like a minute for it to cover the part in blueing from heat.
Reply:Sorry I was referring some of this to the 312 filler thread that's going right now to. I got them a little mixed up
Reply:Originally Posted by motolife313I'm not super worried about being book smart
Reply:Originally Posted by motolife313My friend is a jack of all trades!he said warriors back in the day when they were making there sowrds would after getting them hot and hammering on them would get on the fastest horse and move around the sowrds really fast. He said the molecules go to the out side but the inside will be a little softer.
Reply:Originally Posted by wintermuteIgnoring the knowledge in books and other sources of learning is not only silly, it is an act of self damage. As well, learning only knowledge from books without any practical experience is a failure to grow and experience the world as well as a failure to learn from the actual real world application of your knowledge. Separating practice and the learning from proven sources is a path to abject failure. You should be both proud to learn from practice and proud of your knowledge gained via reading or other purely academic means.Many other people smarter than all of us on here have spent extensive time developing knowledge that we should all seek to absorb and apply.As for your friend... the best I can say is that he has watched too many movies. Archeological studies of sword making sites and the swords themselves show a rather extensive practical implementation of hardening and tempering processes which even if the actual physics of what they were doing were not known, the effect their actions had on the metals was understood at least at a value level. Waving a hot sword around in the air was not one of the activities they took to develop both strength and flexibility even in the very ancient world. Simply put, before making statements of such wildly untrue nature, maybe he should himself go read some books. Ohh yeah, and warriors didn't make swords, swordsmiths did.Basically, go read since it expands your brain, continue to practice since it allows for physical learning and the option to test what you have read, stop listening to your friend, he obviously doesn't know what he his talking about.--Wintermute
Reply:Maybe the friend heard of air hardened steel(tool steel) and made up his own definition? I think Jack "donkey" of all trades might be more accurate. Just to confuse things, there are certain types of stainless steel that are annealed by dunking them in water right after welding.
Reply:Blowing air on a weldment is a waste of time, could be harmful (sh!t shrinking too fast), and look nuts to others who practice the craft...Needle scaler to clean or peen weld area... Lots of folks do that.The only swordsmith stuff that I had ever heard of had to do with Roman times and the thought that body temperature was the best to quench. In practice a slave had to give a life for the warriers sword, since slaves were valuable this wasn't taken lightly.Matt
Reply:Originally Posted by wintermuteIgnoring the knowledge in books and other sources of learning is not only silly, it is an act of self damage. As well, learning only knowledge from books without any practical experience is a failure to grow and experience the world as well as a failure to learn from the actual real world application of your knowledge. Separating practice and the learning from proven sources is a path to abject failure. You should be both proud to learn from practice and proud of your knowledge gained via reading or other purely academic means.Many other people smarter than all of us on here have spent extensive time developing knowledge that we should all seek to absorb and apply.As for your friend... the best I can say is that he has watched too many movies. Archeological studies of sword making sites and the swords themselves show a rather extensive practical implementation of hardening and tempering processes which even if the actual physics of what they were doing were not known, the effect their actions had on the metals was understood at least at a value level. Waving a hot sword around in the air was not one of the activities they took to develop both strength and flexibility even in the very ancient world. Simply put, before making statements of such wildly untrue nature, maybe he should himself go read some books. Ohh yeah, and warriors didn't make swords, swordsmiths did.Basically, go read since it expands your brain, continue to practice since it allows for physical learning and the option to test what you have read, stop listening to your friend, he obviously doesn't know what he his talking about.--Wintermute
Reply:The Bride to O Ren Ishii: "Strike me with everything you have""Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Originally Posted by ManoKaiThe Bride to O Ren Ishii: "Strike me with everything you have"
Reply:Originally Posted by bearstonUnless my tooling broke at the side of the road
Reply:Originally Posted by Matt_MaguireBlowing air on a weldment is a waste of time, could be harmful (sh!t shrinking too fast), and look nuts to others who practice the craft......Matt |
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发表于 2021-8-31 22:09:34