Posted by forty40 on February 14, 2013 at 14:42:05 from (74.77.12.246):
In Reply to: Weld on Hubs posted by smokeshow on February 14, 2013 at 13:54:16:
In the interest of your safety and those associated with a pulling tractor, it is not recommended to use tool steel welded on hub adaptors. Welding tool steel in any dynamic application would not be recommended nor permitted by any code or specification, even if the entire assembly were completely re-heat treated and is asking for trouble. The carbon percent is high, 1.0%, then add the alloying elements of 0.6 Mn, 5.3 Cr, 1.1 Mo, and 0.2 V which brings the carbon equivalent, subsequent hardness, and crack sensitivity near that of arc welding cast iron. Normal steel with carbon % higher than .30 is considered enough to use a minimum of 175 deg F preheat and many application over 5/8” T require PWHT. Maybe luck would be involved and nothing would happen but the risk for catastrophic failure is much higher that could safely be recommended. Should a failure with injury occur, the insurance metallurgical investigation would readily show a lack of sound welding practice and the liability assessment would be astronomical.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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