The Laser Hardening Head for Internal Surfaces is specifically designed for laser hardening of internal bores and cylindrical inner surfaces. Featuring a wide-beam configuration, the beam width can be freely adjusted from 4 mm to 30 mm, enabling both full-surface and selective area hardening for a wide range of industrial applications. With highly concentrated laser energy and a minimal heat-affected zone, the process requires neither water cooling nor oil quenching. No tempering treatment is required after hardening, significantly simplifying the production process. The laser hardening operation maintains the original dimensions and surface roughness of the component while preserving its overall mechanical properties. This technology delivers high-precision, low-distortion internal surface strengthening, making it ideal for wear-resistant and high-performance engineering components.
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| Spot Quality | Intelligent Control and Monitoring | Material Compatibility | |||
Uniformity into a circular shape uniformity of energy distribution directly affects | Lens temperature, molten pool CCD vision, temperature, powder flow monitoring | Copper alloy and Titanium alloy, Iron-based, Nickel-based, Cobalt-based and other metal powders | |||
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| Modular Design | Functionality | Safety | |||
The lens system, moritoring system and optical path system operate in a modular manner,making them easy to disassemble, maintain and service | High-efficiency water cooling, spatter resistant, dustproof, water mist-resistant, low spare parts replacement, frequency sealing rating( e.g., IP65) | Equipped with high-temperature alarm, real-time protection of equipment stability and workpiece cladding quality. |
Performance Parameters | |
Fiber Interface | QBH |
Optical Path Structure | Standard transmission structure |
Cooling Type | Water cooling |
Power Options | 6KW |
Spot Size | 2*20 |
Applicable Materials | Iron-based, nickel-based, cobalt-based, copper titanium and other metal powders |
Operating Wavelength | 1080nm |
Auxiliary Functions | Lens temperature monitoring |
Ideal for surface strengthening and cladding repair of cylindrical, tubular, and flat components across various industries:
Mining & hydraulic support – External surface reinforcement of cylinder barrels and hydraulic legs in coal mining roof supports.
Steel & metal rolling – Wear-resistant cladding for mill rolls, backup rolls, work rolls, and other frequently replaced parts.
Power transmission systems – Surface performance improvement for crankshafts, drive shafts, main shafts, and other rotating components.
Pipeline & energy sectors – External wall protection for pipes used in oil, gas, chemical, and power generation facilities.
Hydraulic systems – Uniform cladding on plungers, sleeves, and tubular parts to ensure sealing reliability.
Flat or partial surfaces – Targeted cladding on localized flat areas or irregular workpiece surfaces.
Q1: Can this laser hardening head perform both full-surface and selective area hardening on internal bores?
A1: Yes. The wide-beam configuration allows the beam width to be freely adjusted from 4 mm to 30 mm, enabling both full-surface hardening
and selective area hardening on internal cylindrical surfaces. This flexibility is ideal for components requiring targeted wear protection —
such as hydraulic cylinder barrels, pipe interiors, and precision bores — without hardening unnecessary areas.
Q2: Why does laser hardening with this head require no water cooling, oil quenching, or post-hardening tempering?
A2: Unlike conventional induction or flame hardening, this head delivers highly concentrated laser energy with a minimal heat-affected zone
(HAZ) . The rapid self-quenching effect of the surrounding base material eliminates the need for external quenching media or water cooling.
No tempering treatment is required after hardening, significantly simplifying production while preserving the component's original dimensions,
surface roughness, and overall mechanical properties.
