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Billet Heating Machine - Technical Penetration Heating Parameters

May. 21, 2026

1. Overview

This document specifies the standard penetration heating technical parameters of medium-frequency induction billet heating machine . The equipment adopts IGBT inverter electromagnetic induction heating technology, which realizes internal and external synchronous penetration heating of metal billets. It features uniform temperature, low oxidation rate, high thermal efficiency and automatic continuous production. It is widely used for forging, rolling, hot extrusion and other metal thermal processing procedures of carbon steel, alloy steel, stainless steel, copper, aluminum and titanium alloy billets.

Billet Heating Machine - Technical Penetration Heating Parameters

2. Basic General Technical Parameters

Parameter Item	Technical Specification	Remarks
Working Power Supply	380V ±10%, 50Hz, 3-phase	Industrial standard power supply
Rated Installed Power	100kW - 10000kW	Customized according to billet size and output
Heating Frequency	200Hz - 10000Hz	Low frequency for large diameter billets; high frequency for small billets
Billet Diameter Range	20mm - 300mm	Round billet; square billet customizable
Billet Length Range	100mm - 12000mm	Long billet for continuous casting and rolling production line
Production Capacity	0.5 - 25 Ton/h	Depends on material and heating temperature
Cooling Mode	Closed circulating water cooling	Cooling water temperature ≤35℃
Control System	PLC intelligent automatic control	Equipped with infrared temperature measuring sensor
Heating Mode	Continuous feeding penetration heating	One-by-one heating without material piling
Working Continuity	24-hour uninterrupted operation	Heavy-duty industrial design

3. Core Penetration Heating Process Parameters

3.1 Temperature Parameter

Cold Billet Initial Temperature: Room temperature (20℃±5℃)
Hot Billet Feed Temperature: 800℃ - 850℃ (continuous casting billet supplementary heating)
Final Heating Temperature: 850℃ - 1250℃ (adjustable according to process)
Temperature Uniformity: Cross-section temperature difference ≤±10℃~±30℃
Temperature Control Accuracy: ±5℃ (intelligent constant temperature mode)

Billet Heating Machine - Technical Penetration Heating Parameters

3.2 Heating Time & Penetration Efficiency

Single Billet Heating Time: 30s - 5min; 1min for 160mm carbon steel cold billet (1600kW power matching)
Penetration Heating Mode: Uniform heat generation inside the billet, surface-core synchronous heating, no overheating on surface
Thermal Efficiency: ≥92%; far higher than traditional gas furnace
Oxidation Scale Rate: ≤0.8%; rapid heating reduces high-temperature standing time

3.3 Transmission & Operating Parameters

Conveying Speed: Stepless speed regulation, adjustable range 9 - 15m/min
Feeding Method: Automatic mechanical feeding, lateral feeding for large billets
Coil Structure: Integral copper coil, customized according to billet diameter to ensure magnetic penetration

Billet Heating Machine - Technical Penetration Heating Parameters

4. Penetration Heating Parameters of Common Materials

Billet Material	Heating Temperature (℃)	Recommended Frequency (Hz)	Application Scenario
Carbon Steel	1100 - 1250	500 - 1000	Hot rolling, forging
Alloy Steel	1050 - 1200	800 - 2000	Mechanical parts forging
Stainless Steel	1150 - 1280	1000 - 3000	Pipe and profile processing
Copper & Copper Alloy	750 - 950	1500 - 5000	Hot extrusion processing
Aluminum Alloy	420 - 520	3000 - 10000	Aluminum profile forging
Titanium Alloy	900 - 1100	2000 - 4000	Aerospace accessories

5. Safety & Auxiliary Parameter

water cooling systemParameter: Water pressure 0.2 - 0.4MPa, water flow ≥8m³/h, cooling water resistivity ≥5μΩ·cm

Protection Function: Overvoltage, overcurrent, water shortage, overheating, short circuit automatic protection

Working Environment: Temperature -10℃~+45℃, humidity ≤85%, no corrosive gas
Noise Level: ≤75dB, low noise operation

Billet Heating Machine - Technical Penetration Heating Parameters

6. Penetration Heating Optimization Instructions

1. For large-diameter thick billets (≥150mm), low frequency (200-800Hz) is adopted to increase magnetic penetration depth and eliminate the temperature difference between surface and core.

2. For small-diameter precision billets (<50mm), high frequency is matched to improve heating speed and avoid internal temperature lag.

3. In continuous casting and rolling production line, the equipment can perform constant temperature supplementary heating for hot billets to stabilize rolling quality.

4. All diathermic parameters support non-standard customization, which can be adjusted according to customer's billet size, output and processing technology requirements.

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