Wear-resistant overlay welded pipe

Product Overview and Design Philosophy

The hardfacing wear‑resistant product series is a specialized, high‑performance solution for pipelines and components designed to withstand the severe conditions of heavy industry—namely, intense abrasive particle erosion, cavitation erosion, and high‑temperature environments. The products are based on carbon steel or low‑alloy steel substrates and utilize advanced arc welding processes to deposit highly wear‑resistant alloy coatings, such as chromium carbide, tungsten carbide, and nickel‑based hard alloys, onto both the inner and outer surfaces of the workpieces.
The product seamlessly integrates the excellent mechanical toughness and structural strength of the steel substrate with the ultra‑high hardness and exceptional wear resistance of the hardfacing alloy layer, effectively addressing common industry challenges such as rapid wear, short service life, frequent replacement, and high maintenance costs that afflict conventional steel components under conditions of high‑velocity material erosion, particle impact, and elevated‑temperature abrasion.

Advanced manufacturing processes and structural advantages

Our company’s wear‑resistant surfacing products are manufactured using well‑established, stable submerged‑arc and gas‑shielded surfacing processes. By precisely controlling welding current, voltage, travel speed, as well as preheating and post‑weld heat‑treatment temperatures, we ensure that the wear‑resistant alloy forms a uniform, dense, crack‑free overlay layer that achieves high‑strength metallurgical bonding with the base material.

The overlay weld layer thickness can be customized to 8–30 mm based on actual operating conditions, with a hardness reaching HRC 58–63. Even under continuous high‑temperature service at 500–600°C, the wear‑resistant layer maintains stable hardness and performance, without softening or spalling.

The overlay weld layer exhibits strong bonding with the base material, and under conditions of severe impact, high-pressure erosion, and alternating thermal cycling, it is free from delamination, scaling, or spalling.

Core Performance and Functional Features

The surfacing‑welded product series combines exceptional wear resistance, impact resistance, and high‑temperature stability. Its high‑hardness alloy layer effectively withstands abrasive wear, erosive wear, and impact wear, delivering a service life far exceeding that of conventional wear‑resistant steel plates and heat‑treated steel components.
The surfacing layer is smooth and dense, reducing material adhesion and erosion‑induced wear, thereby enhancing conveying efficiency and decreasing equipment downtime. Moreover, the overlay alloy exhibits excellent corrosion resistance and high‑temperature oxidation resistance, making it well suited to complex operating conditions where wear, corrosion, and elevated temperatures coexist.
Compared with replacing wear‑resistant components entirely, employing overlay welding repair and remanufacturing processes can significantly reduce overall costs while delivering service lives that are comparable to, or even superior to, those of new parts, thereby generating substantial economic benefits for customers.

The entire product lineup and application areas

This series covers all categories of hardfacing wear‑resistant products: hardfaced wear‑resistant steel pipes, hardfaced reducer pipes, hardfaced wear‑resistant liners, hardfaced wear‑resistant pipe fittings, hardfaced grinding rolls, hardfaced wear‑resistant elbows, and various custom‑shaped wear‑resistant components.
It is widely used in heavy‑industry applications such as pulverized‑coal conveying in thermal power plants, slurry transport in mining operations, raw and clinker handling at cement plants, high‑temperature flue‑gas and material conveyance in steel mills, and wear‑resistant piping in the coal‑chemical sector. It is particularly well suited for conveying systems involving high flow velocities, large particles, and severe abrasive erosion, as well as for wear‑prone components of key equipment like grinding rollers and impact plates.

Rigorous quality control and customized services

All surfacing‑welded products are manufactured in strict accordance with international industry standards and the company’s technical specifications. Prior to shipment, each item undergoes a series of rigorous quality inspections, including nondestructive testing (ultrasonic UT and magnetic particle MT), hardness testing, wear‑resistance evaluation, dimensional accuracy verification, and visual‑quality inspection.
We can customize hardfacing materials, cladding thicknesses, pipe specifications, and structural designs to meet customers’ operating conditions, conveyed media, and equipment requirements. We also offer professional hardfacing repair and remanufacturing services for aging components, providing global industrial customers with a one-stop, cost-effective solution for wear‑resistant equipment that delivers stable performance and high efficiency.