Why Induction Preheating is Essential for Welding

Why Induction Preheating is Essential for Welding: Benefits and Techniques. Induction preheating is a process in which an electrically conductive material is heated by inducing an electrical current in it. The heat is produced by the resistance of the material to the current flow. Induction preheating is widely used in the welding industry for enhancing … Read more

Induction Preheating Before Welding For Stress Relieving

induction preheating before welding pipeline heater

Induction Preheating Before Welding For Stress Relieving Heater Why use Induction Preheating Before Welding ?Induction preheating can slow down the cooling rate after welding. It is beneficial to escape the diffused hydrogen in the weld metal and avoid hydrogen-induced cracks. At the same time, It also reduces the welding seal and heat-affected zone hardening level, … Read more

steel plate-shovels hot forming with induction preheating

Steel plate-shovels hot forming with induction preheating system What is induction pre-heating? Induction preheating is a process where materials or workpieces are heated by induction prior to further processing. The reasons for pre-heating vary. In the cable and wire industry, cable cores are pre-heated before insulation extrusion. Steels strips are pre-heated prior to pickling and … Read more

induction preheating before welding steel pipe

Induction Preheating Before Welding Steel Pipe This induction heating application shows the preheating of steel pipe before welding with 30kW air-cooled induction power supply and air-cooled coil. Inductively preheating of the pipe section to be welded ensures faster welding time and a better quality of the welding joint. Industry: Manufacturing Equipment: HLQ 30kw air cooled … Read more

induction preheating copper bars

induction preheating copper bars to temperature Objective: To preheat two copper bars to temperature within 30 seconds; the client is looking to replace a competitor’s 5kW induction heating system that is delivering unsatisfactory results Material:  Copper bars (1.25” x 0.375” x 3.5”/31mm x 10mm x 89mm ) – Thermal indicating paint Temperature: 750 ºF (399 … Read more

induction preheating copper rod

high frequency induction preheating copper rod and connector for an epoxy curing application induction preheating copper rod and connector for an epoxy curing application Objective: To preheat a portion of the copper rod and a rectangular connector to temperature prior to epoxy curing during a manufacturing process for electrical turnbuckles Material : Customer supplied plated … Read more

Induction Preheating Steel Tubes

Induction Preheating Steel Tubes Objective Induction preheating steel tubes with diameters of 14mm, 16mm, and 42mm (0.55”, 0.63”, and 1.65”). A 50mm (2″) length of the tube much be heated to 900°C (1650°F) in under 30 seconds. Equipment DW-UHF-6KW-III handheld induction heater Materials • Steel tubes with ODs: 14mm, 16mm and 42mm (0.55”, 0.63”, and 1.65”) … Read more

Induction Preheating Hot Rod Heading

induction preheating process

Induction Preheating Hot Rod Heading With IGBT Heating Units

Objective Heat a waspaloy rod to 1500ºF (815.5ºC) for hot heading application
Material Waspaloy rod 0.5” (12.7mm)OD, 1.5” (38.1mm) length, ceramic liner
Temperature 1500 ºF (815.5ºC)
Frequency 75 kHz
Equipment • DW-HF- 20 kW induction heating system, equipped with a remote workhead containing two 1.32μF capacitors for a total of .66μF
• An induction heating coil designed and developed specifically for this application.
Process A seven turn helical coil is used to heat the rod. The rod is placed inside the coil and power is applied for two seconds
providing enough heat to penetrate the inner core. An optical pyrometer is used for close loop temperature control and a
ceramic liner is used so the rod does not touch the coil.
Results/Benefits Induction heating provides:
• Low pressure and minimal residual stress
• Better grain flow and microstructure
• Even distribution of heating
• Improved production rates with minimal defects

Preheating Hot Rod Heading

Induction Preheating Hot Heading

Induction Preheating Hot Heading For Single Rod With IGBT Induction Heater

Objective Heat a waspaloy rod to 1500ºF (815.5ºC) for hot heading application
Material Waspaloy rod 0.5” (12.7mm)OD, 1.5” (38.1mm) length, ceramic liner
Temperature 1500 ºF (815.5ºC)
Frequency 75 kHz
Equipment • DW-HF-45KW induction heating system, equipped with a remote workhead containing two 1.32μF capacitors for a total of .66μF
• An induction heating coil designed and developed specifically for this application.
Process A seven turn helical coil is used to heat the rod. The rod is placed inside the coil and power is applied for two seconds providing enough heat to penetrate the inner core. An optical pyrometer is used for close loop temperature control and a ceramic liner is used so the rod does not touch the coil.
Results/Benefits Induction heating provides:
• Low pressure and minimal residual stress
• Better grain flow and microstructure
• Even distribution of heating
• Improved production rates with minimal defects

induction preheating hot heading

Induction Preheating Welding Steel Pipe

Induction Preheating Welding Steel Pipe With High Frequency Heating System

Objective To preheat a steel pipe to 500ºF (260ºC) before welding.
Material Steel shaft assembly 5” to 8” OD (127-203.2mm) with a 2” (50.8mm) heat zone.
Temperature 500ºF (260ºC), if higher temperatures are required, heat time can be increased.
Frequency 60 kHz
Equipment • DW-HF-60kW induction heating system, equipped with a remote workhead containing eight 1.0 μF capacitors for a total of 8 μF.
• An induction heating coil designed and developed specifically for this application.
Process A multi-turn two position channel “C” coil, adjustable on a busbar is used to heat the desired heat zone. The coil is adjustable to fit various diameter pipes. The shaft is rotated in a fixture and heated for 3 minutes to achieve a temperature of 500ºF (260ºC).
Results/Benefits Induction heating provides:
• Preheating prevents shock to shaft which eliminates cracking in the welding phase.
• Hands-free heating that involves no operator skill for manufacturing.
• Even distribution of heating between the shank and the  sleeve.

induction preheating welding steel pipe

 

 

 

 

 

 

induction preheating steel pipe before welding

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