Laser cladding brings new life to the workpiece

[Rui classroom | Rayclass] Issue 5: Laser cladding brings new life to the workpiece


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Introduction to ultra-high-speed laser cladding

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[Rayclass | Rui Class] Issue 2: Ultra-high-speed laser cladding-innovation of green remanufacturing process

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Recently, many people have left messages asking


What is the magical effect of laser cladding technology?


Which laser products are currently suitable for laser cladding?


Which laser product is more advantageous?


What industries can laser cladding be applied to?

This issue [Ray Class | Rayclass]

Take you to the laser cladding processing site

Take you to witness laser cladding

Equipment and parts in petrochemical industry

The magic of manufacturing and remanufacturing

Exciting content

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There are three types of lasers currently used in the laser cladding market:

CO2 laser

YAG laser

Semiconductor laser

What are their characteristics? How to choose? And listen to the detailed decomposition:

CO2 laser

The wavelength of carbon dioxide laser is generally 10.64 μm, which is 10 times the wavelength of semiconductor laser and YAG laser. To increase the surface power density, the output power of the equipment must be increased. Therefore, the carbon dioxide laser output power applied in the cladding market is very large.

However, cladding equipment using carbon dioxide lasers is not the best choice for laser metal cladding processes.

(1) Equipment purchase, operation, and maintenance costs are relatively high . Frequent replacement of vulnerable parts is expensive and expensive;

(2) The equipment is bulky and is not suitable for on-site repair and use with various cladding tools;

Bulk CO2 laser equipment

(3) The carbon dioxide laser heat-affected zone is extremely high, and the rate of thermal deformation of the cladding parts is high . It is necessary to perform complex thermal insulation treatment on the cladding parts during and after the cladding process.

YAG laser

Unlike the high cost of carbon dioxide laser cladding equipment, the YAG laser has a simple structure, is easy to repair, and the price of accessories is low. If the cladding amount is not large, it can be a good choice.

But YAG laser also has obvious shortcomings-low electro-optical conversion rate, small output power, low cladding efficiency, not suitable for large components , large area cladding, suitable for repairing thin-walled parts, small parts, and highly deformable parts .

Direct semiconductor laser

At present, direct output semiconductor lasers are mostly used for laser cladding on the market. Direct output semiconductor lasers are small in size, light in weight, and have a 50% electro-optical conversion rate, which solves the shortcomings of carbon dioxide lasers such as large volume, bulkiness, and excessive laser wavelength It also solves the problem that YAG laser cannot produce high-power output laser.

However, direct output semiconductor lasers also have their own disadvantages when applied to cladding:

(1) Beam shaping is difficult, and it is difficult to shape the laser output spot to a very small size, so it is not suitable for cladding of thin-walled, small, high-precision and easily deformed parts ;

(2) Directly facing the cladding substrate, the thermal radiation from the molten pool of the substrate will cause great damage to the laser light emitting bar, which cannot meet the long-term processing application .

High equipment cost?

Cannot meet both large and precision devices

Processing needs?

Still need long-term continuous processing applications?


The above three lasers are used in cladding applications

Each has its own disadvantages

Is there a laser

Able to solve these existing

The cladding function is insufficient

Fiber Output Semiconductor Laser

Optical fiber output semiconductor laser independently developed by Ruike Laser came into being

In order to solve the problems of various cladding functions in the application of hydraulic rods in the petroleum and mining industries, Ruike Laser has developed high-power fiber output suitable for cladding applications in mining machinery, turbine power equipment, steel rolling equipment, large molds and other fields. A semiconductor laser.

√ The  laser beam is transmitted through the optical fiber. Whether it is a high-precision and easy – to-deformation accessory that requires a small spot focusing output or a large spot shaping for large-area cladding, it can be easily completed;

√ The  laser beam is transmitted through the optical fiber, and the spot power density is evenly distributed. The laser cladding molten pool has low splashing, the cladding layer is delicate , and there is no air eye;

  fiber propagation distance long, with a variety of cladding tooling, robot used in conjunction ;

√ The  laser is transmitted through the optical fiber, which solves the problem that the optical radiation of the molten pool causes damage to the laser;

√Small  size, light weight, simple operation, maintenance-free, the price is equivalent to the price of direct output semiconductor laser.

Application of hydraulic rod in petroleum and mining industry

Laser cladding technology is a high-tech surface modification and equipment maintenance technology that can significantly improve the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of metal surfaces.

Laser cladding processing technology has a wide range of applications and fields of application, covering almost the entire machinery manufacturing industry, including mining machinery, petrochemicals, power, railways, automobiles, ships, metallurgy, medical equipment, aviation, machine tools, power generation, printing, Packaging, mold, pharmaceutical and other industries.

Hydraulic support column

The modern petrochemical industry basically adopts a continuous mass production mode. During the production process, the machine works in a harsh environment for a long time, resulting in damage, corrosion and wear of the components in the equipment. Often the parts that have problems include valves. , Pumps, impellers, journals of large rotors, disks, bushings, bushes, etc., and these components are very expensive, most of them have complex shapes, and it is difficult to repair them.

Among them, the wear of hydraulic rods occurs from time to time in equipment management and maintenance of industrial enterprises: strains, scratches, and fatigue wear are common.

Damage to the hydraulic rod to be repaired

Traditional repair processes include: repair welding, brazing, gas shielded welding, electroplating and spray coating.

However, the above traditional repair process will have uneven heating and unsatisfactory repair results; low bonding force and easy to fall off; porous welding layer, rough surface; unenvironmental protection, large environmental pollution and other problems, it is easy to re-wear after repair and cause The occurrence of oil leakage.

How to solve problems quickly and effectively

And reduce maintenance costs?

Laser cladding has become a new green remanufacturing method to renew old machinery and equipment.

Take you into the laser cladding processing site

How effective is the cladding effect?

Let’s take a closer look

After cladding effect

Severe hydraulic rod wear, after laser cladding processing by optical fiber output semiconductor laser, the hydraulic rod wear has been repaired, and the surface completely meets the work requirements.

After turning and milling

Effect of penetration testing

In addition to remanufacturing and repairing various metal defects such as wear, corrosion, chromium marks, scratches, and strains, laser cladding can also improve the hardness, wear resistance, corrosion resistance, high temperature resistance, non-magnetic, etc. The required accessories are surface modified.

In addition to remanufacturing and repairing of hydraulic rods in the petrochemical industry using laser cladding, construction machinery (hydraulic rods, hydraulic cylinders), mining machinery, industrial machinery (screws, screws, shaft rollers, etc.), valves and other industries, such as various types Wear-resistant spray welding of valve sealing surfaces (conventional disc valve, ball valve, gate valve, globe valve, check valve, safety valve, valve ring, valve seat, etc.), and the wear of petroleum drill rods, bearings, shafts, rolls In areas such as repair, laser cladding can play its magical role in manufacturing and remanufacturing.