L&L Special Furnace built and delivered a highly uniform, front-loading box furnace to a northeast U.S.-based supplier of titanium castings for the aerospace and power-generation industries. The company deals with exotic metals such as nickel and cobalt-based alloys that are ideal for products using the lost wax process for castings. The furnace has an effective work area of 48 inches wide x 32 inches high x 60 inches deep and has certifiable temperature uniformity of ±10°F from 500°F to 1850°F (260°C to 1010°C).
L&L Special Furnace built and delivered a highly uniform box furnace to a distributor of equipment to maintenance repair and overhaul (MRO) facilities throughout the world. The furnace has working dimensions of 11 inches wide x 10 inches high x 22 inches deep. It is capable of heat treating a wide variety of tool steels – from D-2 to high-speed M-2 tool steel – along with low-temperature tempering. It is equipped with a sealed case for inert-atmosphere capability, as well as a fully functional atmosphere control panel with pressure regulator, flow meter and manual shutoff valve.
Lindberg/MPH built and shipped a gas-fired cyclone box furnace to a manufacturer. The heat-treat furnace has a maximum temperature rating of 1250°F and a load capacity of 6,000 pounds. It is designed for air atmosphere applications and utilizes a high-velocity forced heating system. A circulation fan provides optimum heat distribution by delivering heat evenly throughout the work chamber through high static pressure airflow. The furnace is designed to accept fixtures that are 48 inches wide x 84 inches deep x 48 inches high, and a full-width roller hearth is located across the furnace chamber floor for manual loading and load support.
L&L Special Furnace Company Inc. shipped a large high-temperature box furnace to a Midwest plant starting production on ceramic matrix parts that will be used in military and aerospace applications. The furnace, which has been commissioned, has an effective work zone of 32 inches wide x 30 inches high x 50 inches deep and is capable of reaching temperatures up to 3100°F (1700°C) under partial atmospheric pressure. There is also a vacuum pump to help remove oxygen prior to beginning the thermal cycle.
Lindberg/MPH is a leading manufacturer of standard and custom industrial heat-treat furnaces. Their line of heat-treat furnaces includes pit, box, IQ and belt-type designs for the ferrous and nonferrous markets. In addition to heat-treat furnaces, Lindberg/MPH designs and manufactures a full line of melting and holding furnaces for nonferrous alloys.
L&L Special Furnace Co. Inc. received an order for two atmosphere-controlled retort box furnaces. They will be used for debindering ceramic composite matrix (CMC) parts, powder-metal processing and hot isostatic processing (HIP). The main function of the furnaces is to remove all organics and other materials used in the product prior to placing in a high-fire vacuum chamber. The debindering process is extremely important and allows for a finished product that is very strong and light. The furnaces have a work zone measuring 23 inches wide x 23 inches high x 36 inches deep. They have a single zone of control with a temperature gradient of ±20°F at 1100°F (595°C) using four zones of temperature control with biasing to balance any temperature gradients.
L&L Special Furnace Co. received orders for a floor-standing box furnace for heat treating saw blades and for a large floor-standing, fiber-lined furnace that will be used to stress relieve and temper large steel castings. The box furnace has an effective work zone of 34 inches wide x 34 inches high x 44 inches deep and includes an electric vertical door, an alloy hearth and a complete control system. The furnace's primary function is to heat treat a range of tool steels that are used for saw blades. The floor-standing furnace has an effective work zone of 36 inches wide x 36 inches high x 72 inches deep. It includes a pneumatic vertical door, 24-inch-high convection alloy fan, a complete control system, castable piers and a cast-alloy load platform for forklift loading.
L&L Special Furnace Co. Inc. built and delivered a high-uniformity electric box furnace to a valve manufacturer located in the southeastern United States. The front-loading, refractory-lined unit has an effective work zone measuring 22 inches wide x 22 inches high x 20 inches deep. There is a horizontal double-pivoted door with a safety power cutoff switch. A ceramic hearth and standoffs are provided as a workspace. The furnace is equipped with solid-state relays for fast cycle times. These are housed in a NEMA 1 control panel with single-point power connection.
L&L Special Furnace Co. Inc. shipped a floor-standing, high-temperature box furnace to a global supplier of piezo ceramics used in the military, aerospace and medical industries. The furnace, which has an effective work zone measuring 18 inches wide x 18 inches high x 36 inches deep, has a double-pivot horizontal door. It is used for processing glass products to 2500°F (1371°C). This process causes lead to outgas. As a result, the furnace interior is constructed of high-alumina refractory with less silica than normal linings, which helps delay the corrosive reaction between the silica present in the refractory and the lead outgassing at elevated temperatures.
Watch – via slideshow – a large box furnace being installed at an Alabama business. The furnace was built by Thermcraft Inc. of Winston-Salem, N.C. It will be used to heat up steel mill rolls to operating temperature so they can be welded and remanufactured to their original size.
Posted October 13, 2015
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