mid-15c., from drip (v.). The slang meaning stupid, feeble, or dull person is first recorded 1932, perhaps from earlier American English slang sense nonsense (1919).
Time at heat and temperature are critical in the hardening transformation phase. Rapid cooling and tempering complete the process. Quench and Temper provides strength and uniformity of hardness through the entire part from the surface to the core. This is achieved by heating the entire part up above the transformation temperature for a set period of time. Upon quenching, parts must be tempered to the desired hardness creating a Tempered Martensitic Microstructure. Medium Carbon Steels (.25-.70C) are commonly Quench and Tempered. During this quenching process, parts are cooled rapidly thereby locking in the microstructure transformation. Oil is a very common quench medium for this process.
1 Pressure-treated wood is intended for outdoor use only! 2  There are a few exceptions to this rule, though you should check with your local building inspector to be sure. 3  First is the use of pressure-treated wood in place of Douglas fir for sill plates in new construction.ressure treating is a process that forces a chemical preservative deep into the wood. The wood product is placed into a humongous cylindrical holding tank, and the tank is depressurized to remove all air.