Radiant heat treatment: process vies with localized approach.A new cost-effective technology to heat treat ferrous materials promises higher quality, reduced cycle times, and more applications than other comparable methods. Radiant heat heat proceeding in right lines, or directly from the heated body, after the manner of light, in distinction from heat conducted or carried by intervening media.
See also: Radiant treating (RHT RHT Reinforced Heel and Toe (stockings)
RHT Richtig Hartes Training
RHT Atlantic Sharpnose Shark (FAO fish species code)
RHT Retractable Hard Top (convertible autos) ), offers numerous advantages over other localized heat treating services, such as induction, flame, laser, and electron beam. (See table 1).
RHT heat treats most carbon steel and steel alloys, including tool steels and martenistic stainless steel stainless steel: see steel.
Any of a family of alloy steels usually containing 10–30% chromium. The presence of chromium, together with low carbon content, gives remarkable resistance to corrosion and heat. . With RHT, technicians can perform a variety of heat treatments such as stress relief, quench quench,
v to cool a hot object rapidly by plunging it into water or oil.
to put out, extinguish, or suppress; to cool (as hot metal) by immersing in water. and temper, austemper, martemper, and anneal To take the brittleness out of metal, plastic or certain carbon composites. Performed in the preparation of new products or in their restoration, annealing is accomplished via a heat treating process. to produce the desired hardness range and/or microstructure mi·cro·struc·ture
The structure of an organism or object as revealed through microscopic examination.
a structure on a microscopic scale, such as that of a metal or a cell .
The process can heat treat selective areas or entire surfaces of flat, cylindrical, or complex shapes. Parts may measure more than several square feet. While the overall process of induction heating can produce a hardening depth from 0.010[inch] to 0.250[inch], an individual induction unit is limited to a much narrower range. The specific hardening range depends on a number of variables, including the power source operating frequency as well as the shape and number of tuns of the induction coil. In contrast, the hardening depth for one RHT unit can be electronically adjusted to heat treat from 0.010[inch] to more than 0.500[inch] deep without changing equipment.
Unlike induction heating, RHT can easily heat treat a fiat part with a wide variation in cross sectional thickness or a cylindrical part with several different diameters. Even a part that requires deep hardening in one area and shallow hardening in another can be heat treated in one step using a RHT furnace.
Hardening with RHT results in cost reductions because it requires no part specific tooling such as an induction coil or electrode. For induction heating, the energy source to part distance, or air gap, is generally 0.06[inch] to 0.08[inch] while that of RHT can be as broad as 5[inches]. The part heating rate for RHT is independent of the energy source to part distance.
The RHT process also offers a range of other advantages including:
* Areas can be hardened at one time by using an electronically adjustable heating ramp and soak sequence. Yet, if necessary, parts can be progressively scanned.
* Depending on the specific requirements, RHT's heating rate may actually be faster than that of induction hardening. Due to this capability and RHT's process flexibility, skilled personnel can heat treat a part without damaging a nearby temperature sensitive coating, joint, or adjacent material.
* Technicians can heat treat individual or multiple parts simultaneously. Multiple parts may consist of a single part number or a family of similar parts.
* Parts can be heat treated in a variety of environments including open air, protective, or vacuum to accommodate a wide range of part requirements. [TABULAR DATA FOR TABLE 1 OMITTED] After parts are heated to the appropriate temperature, they may be quenched quench
tr.v. quenched, quench·ing, quench·es
1. To put out (a fire, for example); extinguish.
2. To suppress; squelch: in water, oil, air, or a polymer.
Whether the part shape is flat, cylindrical, or complex, most ferrous parts can be heat treated with RHT. Using RHT may result in cost reductions and quality improvements.
Adaptive Coating Technologies (ACT) LLC (Logical Link Control) See "LANs" under data link protocol.
LLC - Logical Link Control , Waunakee, WI, developed RHT as part of a Small Business Innovation Research (SBIR SBIR Small Business Innovation Research (program/grant)
SBIR Space Based Infra-Red
SBIR Speaker-Boundary Interference
SBIR Site Backsurface-referenced Ideal Plane/Range (silicon wafers) ) award. ACT is currently developing RHT for a Phase II SBIR project on armor plate fabrication fabrication (fab´rikā´shn),
n the construction or making of a restoration. . In Phase I, ACT successfully heat treated 1/2[inch] thick titanium/steel plates to a hardness of 60 Rc. Numerous commercial applications for RHT exist in the agriculture, mining, pump, oil, aerospace, and automotive industries.
For more information from Adaptive Coating Technologies LLC, Waunakee, WI.