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There are several ways of hardening the ways of a machine (like a lathe). Let's jump around a bit and see what's shakin' here. You are probably familiar with what is called work hardening. If you have a coat hanger you wish to cut, but have no cutters, you can bend it back and forth to change the metallic crystal structure in a specific area. Bending it makes the crystal structure smaller, and smaller crystals are harder than large ones. The flexing of the mild steel will harden it, and then it will "flex less" and finally break there. When we "work" iron (which is a material of choice for machine housings), we harden it. Shot peening, using small shot blasted on metal parts (like the connecting rods of pistons which we "upgrade" in automotive machine shops) does the same thing on the surface of the rods. It work hardens them. If we can "work" metal, we can harden it. So how do we "beat on" a lathe bed? Glad you asked. There is an industrial process that is widely used to heat, weld or otherwise modify materials called ultrasonics. Imagine a speaker, but small, very high powered and operating at a really, really high frequency (above audible sound - ultrasound). If we can "beat on" stuff with the mechanical energy created by this device, we can ultrasonically modify it. We can harden metal with it. And by ultrasonically treating the ways of a lathe bed, we can beat the heck out of the local crystal structures, reduce the size of the crystals themselves, and thereby harden the material (after which we machine it true). Ultrasonic hardening. Done deal.
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Why it is necessary to temper hardened steel immediately after quenching?
to avoid the high internal stresses caused by quenching and to get tempered Martensite that is less brittle
What are the applications of FIFO?
method of price asertainment
What manufacturing processes were applied to SS Forged Fittings?
There are four processes of manufacturing a SS forged fittings. First is Mandrel method, as the name suggests a curved mandrel is inserted into a length of pipe. Extrusion Method consists of a machine that has the mould of the fitting into which the pipe inserted and come out in the shape of a fittings.Next is the UO method in which a piece of sheet is cut out and then it is pressed on an anvil that has the inverted shape of a fittings. Hot Forming Method is somewhat similar to Extrusion Method, here a piece of pipe goes through a mould of the fittings and come out in the needed shape.
Briefly describe classification of manufacturing process?
The different classifications for manufacturing processes are casting processes, machining processes, surface finishing processes, metal working processes joining processes, and shearing and forming processes. The processes used to change the physical characteristics of materials are hardening and tempering.
The inventory valuation method that tends to smooth out erratic changes in costs is?
Weighted average method which requires to use the weighted average cost per unit of inventory at the time of each sale.
Core hardening definition?
Core hardening refers to the innermost portion of metal. When the outer layer remains soft, but the inner portion is hardened, this is core hardening.
What is another word for lock down?
Hardening. Locked-down version of Linux = Hardened Linux Lock-down version of Tomcat: Tomcat hardening
Two ways can aluminum be hardened?
Aluminum can be hardened through heat treatment processes such as precipitation hardening, where the aluminum is heated and then rapidly cooled to increase its strength. Another method is cold working, where the aluminum is deformed at low temperatures to introduce dislocations and improve its mechanical properties.
What type of hardening is done to lathe bed?
mostly is the hardening done by induction hardening machine, I know also manufactures that do this using the flame hardening method.
Why does hardened steel rust faster?
Hardened steel can rust faster than regular steel because the hardening process can disrupt the steel's natural corrosion resistance. This can lead to increased vulnerability to rust and other forms of deterioration. Hardened steel may also have more exposed surface area due to the hardening process, which can make it more prone to rusting.
What is the Medical term meaning hardening of a nerve?
Any hardening of the brain is called encephalosclerosis.If the hardening occurs in the cerebral hemispheres (as opposed to the rhombencephalon), it is called cerebrosclerosis. This is a morbid condition.The hardening of arteries within the brain is a form of arteriosclerosis, which in most cases is atherosclerosis. The buildup of hardened scar tissue within the brain can also be caused by the demyelinating autoimmune disease multiple sclerosis.
What does calcification of a tumor mean?
Made bony or hardened by calcium deposits.
What is the medical terminology combining form meaning hardening?
-sclerosis or -sclerotic is the medical terminology combining form meaning hardened, as in atheroscerotic.
What the definition of critical cooling rate in a context of austenite transformation?
The slowest rate of cooling from the hardening temperature which will produce the fully hardened martensitic condition.
What group II metal is a hardening agent in alloys?
Iron alloys are hardened by carbon, Manganese or Molybdenum, Chromium, Titanium, Nickel, Boron, Cobalt
Why do PVA glue solids settle out?
This is caused by the carrier evaporating, which is the drying and hardening method of PVA glues.
Difference between air hardening and stainless steel?
There isn't really a difference since a piece of steel can both stainless and air hardened. Stainless steel is a steel alloy with a minimum of 10% chromium content by mass. Metals can be hardened in a variety of ways. They may be work hardened, tempered, air or oil hardened, for example. Tempering, or the systematic heating, cooling and reheating of a material is one technique that might be used to harden steel.
