The Ford Barn

jhowes · 02-26-2018, 10:27 AM

A post some time ago showed a frame being straightened by heating the frame below the motor mount to rather high temperature and then letting it cool and shrink back to it's correct place making the frame straight again. My question has to do with the temperature and cooling with oil or water, what does the cooling do to the metal? I can measure the temperature with my infrared temperature gun. If I gas weld the old frame horns on the front of the frame, do I use a more rapid cooling technique or not. Why did I hear some 70 years ago about people hammering charcoal into red hot iron? Was this only done to make a edge that could be sharpened? How about springs, can they be heated without taking away from the spring of the steel? Just an old man curious. Thanks, Jack

02-26-2018, 10:27 AM	#1
jhowes Senior Member Join Date: Jul 2010 Location: upstate NY near Mass border Posts: 789	metalergy A post some time ago showed a frame being straightened by heating the frame below the motor mount to rather high temperature and then letting it cool and shrink back to it's correct place making the frame straight again. My question has to do with the temperature and cooling with oil or water, what does the cooling do to the metal? I can measure the temperature with my infrared temperature gun. If I gas weld the old frame horns on the front of the frame, do I use a more rapid cooling technique or not. Why did I hear some 70 years ago about people hammering charcoal into red hot iron? Was this only done to make a edge that could be sharpened? How about springs, can they be heated without taking away from the spring of the steel? Just an old man curious. Thanks, Jack