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commercial heat treating

specialty products

COMMERCIAL HEAT TREATING

Duraloy also makes products for the commercial heat treating industry. Parts such as furnace piers, baskets, trays, rollers and roller rails, muffles and radiant tubes are sold world wide for use in commercial heat treating furnaces and processing.

COMMERCIAL HEAT TREATING

SPIRAL AND BATCH RETORTS

Commercial heat treating

		“W" Radiant Tube Assemblies Duraloy produces a variety of radiant tube assemblies, like the "W"-Style assemblies shown here. Duraloy can produce "turn-key" fabrications, assemblies that are fully fabricated, including installation of the bung plates, bellows and ceramic fiber blankets. The bungs and ceramic blankets are wrapped in plastic to protect them during shipment and storage. back to top
		Small Diameter Furnace Rolls These small diameter (approx. 4" OD {102mm}) rolls are used in furnaces where the materials being transported have very little strength at temperature, like glass, aluminum, etc. The small diameter allows the rolls to be placed close together to provide much more support for the sheets or strips as they move through the furnace. back to top
		Heat Treat Furnace Door These furnace dampers are used to either control the temperature and air flow within a high temperature furnace or are used to open and close the end of a furnace to allow product to move in and out. The ends of the shaft portion are machined to allow them to be installed in bearing housings and an actuator is attached to the back, with pins, to cause the damper to move. These doors are cast in HK-40 alloy. back to top
		Heat Treat Basket Bottom These grid bottoms are cast then welded into the bottom of a cylindrical basket used for heat treating specialty components. The baskets are loaded with parts then placed in a hot furnace. After thermal treatment, the baskets are lifted out of the furnace and set into a quench tank, usually containing either water or oil. The grid configuration allows both the heat and quench media to completely surround the parts, giving a homogenous thermal treatment to the parts. These grids are cast in ASTM A297 Grade HU alloy. back to top
		Hanger Brackets These hanger brackets, cast in HK-40 alloy, are bolted into the inside of a high temperature furnace. They are then used to secure other structural members inside the furnace, such as tube sheets and supports. back to top
		Centrifugal Tubes Not all tubes are shipped from Duraloy in full mold lengths. These tubes have been cut to exact drawing lengths per customer order specifications. These tubes are to be placed in the bottom of a car bottom furnace for use as piers in a commercial heat treating operation. back to top
		Radiant Tube Return Bends With Lugs These return bends are statically cast, beveled then sent to our fabrication department to have the statically cast lugs or "support foot" welded on. After the lugs are installed, the returns are sent to the fabrication bay to be assembled and welded into radiant tube assemblies. These returns can be cast in any alloy, but are typically done in Duraloy's proprietary alloy MO-RE-1®, Super 22H®, or HK-40 alloy as required. back to top
		Heat Treat Furnace Grate Grates like this one are used in commercial heat treating furnaces. The open slots allow heat to flow evenly throughout the furnace and, as in this case, have a cast on bracket to allow for easy removal when hot. back to top
		Heat Treat Feed Screws These "screws" or augers are typically placed inside a larger tube or muffle and are driven from one end using a motor. The turning action then moves the parts being heat treated through the muffle at a very controlled rate. The screws can also be placed at the bottom of a bin or hopper and be used to control the flow of small pieces out of the hopper. These static castings can be cast in just about any alloy, although HT and Duraloy's proprietary Super 22H® alloy are the most common. back to top
		Radiant Tube Assemblies These radiant tube assemblies, some with bung plates and some without, are produced for a continuous annealing line, and are shipped ready for installation by the customer. These assemblies are manufactured complete including, when specified by the customer, blanket insulation, bung plates, insulation anchors and expansion bellows. Alloys that are typically used to produce radiant tubes are Duraloy's proprietary alloys 22H®, Super 22H®, or MO-RE-1®, depending on the temperature that the tubes will be exposed to in service. back to top
		Heat Treat Basket Bottoms These statically cast basket bottoms are placed inside of a larger, open-topped basket and are used to support parts while they are in a heat treating furnace. The large, open slots in the bottom allow the heat and furnace atmosphere (carburizing, nitriding, etc.) to circulate freely around the parts. These bottoms can be cast in any alloy, but are often manufactured in Duraloy's proprietary alloys MO-RE-1®, MO-RE-10® or Super 22H®. back to top
		Heat Treat Muffle End This statically cast end is welded onto a heat treat muffle to provide both structural support for the muffle tube and to provide a flange which can then be used to bolt the muffle up to another part of the heat treating assembly. These castings are usually made in a heat resistant alloy like HK, or HK-40. back to top
		Heat Treat Furnace Rails These statically cast rails are typically attached to the heat treating furnace floor using bolts. Small, statically cast rollers or wheels are then placed into the spaces along the top side of the rail. Heat treat trays are loaded with parts and are pushed or rolled along the rails into and out of the furnace. These rails can be cast in just about any heat resistant alloy, however, HT, HP, and Duraloy's proprietary alloy Super 22H® are the most common alloys purchased. back to top
		Spacer Blocks These statically cast blocks are used in a fashion similar to tube support sheets. Cast in a variety of heat resistant alloys, spacer blocks are placed between tubes installed in a high temperature furnace to prevent the tubes from coming into contact with each other during use. back to top
		Statically Cast Furnace Brackets The statically cast furnace brackets are cast in Duraloy's proprietary alloy Super 22H® alloy, but they can be cast in any of a wide variety of alloys, including MO-RE 1®, MO-RE 2®, 22H®, HH-2, or HN. These cast components are part of the structural supports operating inside a heat treat furnace. back to top
		Heat Treat Furnace Door This cast furnace door is machined at Duraloy so that heat resistant panels can be bolted to the support frame. This door is cast in HT alloy. back to top