“In the past, we used arc welding to perform wear-resistant treatment on the card sleeves. However, during the welding process, problems such as cracks, pores, large spatter, and poor molding often occur, which seriously affect the quality of the wear-resistant belt on the workpiece. and welding effect. After in-depth contact with Huirui’s technical team, we learned that Huirui has a relatively complete process system in terms of high-strength workpieces, high wear resistance, and high impact toughness, and has rich cladding practice cases in the petrochemical industry. Decisively decided to sign a contract with Huirui. Now after using laser cladding technology to repair the card drill sleeve, the service life has been increased by 5 to 8 times. It also saves construction space and time, and greatly saves costs.” – Recognition and recognition from customers Good reviews

Background of the project
As an important part of oil exploration and drilling, oil drill pipe ferrules have an extremely harsh working environment, and their high wear resistance, high impact, and corrosion resistance must be guaranteed. The laser cladding process can form a strong and durable protective film on the surface of the card sleeve, which effectively prevents external gasoline, oil smoke, and other factors from invading the card sleeve, thus extending the service life of the card sleeve. In addition, it can also increase its surface roughness, maintain surface smoothness, and improve surface wear resistance.

skills requirement
1. The workpiece must achieve high wear resistance, high strength, and corrosion resistance.
2. The surface of the workpiece should be relatively flat. There is no need for machine leveling when spray painting is done directly on the surface of the workpiece.
3. There should be no powder stuck to the surface on both sides of the drill sleeve and the thread, and the threads of the workpiece should not be bumped.

Laser cladding process advantages
Laser cladding technology uses a high-power density laser beam to quickly heat and melt the metal substrate and the metal powder sent to the surface of the substrate. It takes full advantage of the extremely fast heating and cooling characteristics of the laser beam and continuously spreads it on the surface of the substrate to form a layer of bonding strength. The alloy coating with high, low dilution rate, refined grains, and uniform composition improves the corrosion resistance, wear resistance, high-temperature oxidation resistance, and other properties of the base material. Compared with traditional processes, the use of laser cladding methods to repair the surface of oil drill pipe ferrules has many advantages: First, it can achieve high strength, high precision, and high wear resistance surface treatment, and has corrosion resistance, The benefits of high temperature effectively improve the service life and performance of oil drill pipe ferrules; second, the laser cladding process is greener and environmentally friendly than traditional processes. Third, safe and efficient production and processing can be achieved.

Cladding samples and testing

1. Cladding samples
The cladding surface is relatively smooth and meets customer requirements.

2. PT coloring flaw detection
Through PT flaw detection, it was observed that there were no cracks or pores on the surface of the workpiece.

3. Metallographic examination
The distribution of tungsten carbide inside the cladding layer is relatively uniform and there are no obvious defects. The cladding layer is well combined with the foundation and there are no unfused defects.

As a leading domestic provider of special equipment and technical services for additive manufacturing of high-performance metal parts, it has accumulated a database of laser additive processes for various high-performance alloy materials to meet the application needs of various industrial fields. In the future, Huirui will use its years of professional experience in metal additive manufacturing technology to deepen its layout in the fields of the petrochemical industry, aerospace, metallurgical industry, energy and power, mold manufacturing, engineering machinery, rail transportation, etc., empowering industrial enterprises to quickly achieve high quality develop.