Engineered for open-arc surfacing, providing continuous wear resistance without shielding gas under high-stress grinding abrasion.
Premium alloy formulations containing complex carbides designed specifically for heavy-duty restoration and anti-wear reinforcement.
Premium bimetallic wear protection composed of a structural backing plate and a hardfacing overlay layer of dense chromium carbides.
Ultra-high hardness wear solutions utilizing the Runxing RX-m series, built to withstand extreme mechanical abrasion in chutes, hoppers, and screens.
High-carbon, high-chromium composite plates designed for harsh processing environments requiring exceptional durability.
Specifically formulated self shielded flux cored wire containing high chromium alloys designed for resisting high stress grinding abrasion with low impact.
High performance open-arc welding alloy optimized for surfacing steel plant rollers and wear elements subject to heat and high-stress abrasion.
RX Surfacing equipment with four welding guns, 10.2-inch touch screen control, and advanced automation for wear plate production and roller cladding.
Self-shielded flux-cored arc welding (FCAW-S) is a core process in industrial surfacing and hardfacing applications. Unlike gas-shielded methods (FCAW-G or GMAW) that require external shielding gases like Carbon Dioxide (CO2) or Argon (Ar) mixes, self-shielded wire relies on a precise, chemically active core formulation.
During the arc welding process, the internal core ingredients decompose to generate their own protective gaseous envelope, combined with a quick-freezing, slag-forming system that protects the molten metal droplet from atmospheric nitrogen and oxygen contamination. This metallurgical mechanism makes the wire highly portable, exceptionally wind-resistant, and ideal for on-site field repairs across mining sites, cement factories, steel plants, and heavy bulk material terminals.
The chemical architecture of premium self-shielded flux-cored wire typically incorporates high concentrations of Chromium (Cr), Carbon (C), and trace alloying elements like Boron (B), Niobium (Nb), and Vanadium (V). The high carbon and high chromium content enables the precipitation of primary M7C3 chromium carbides (with hardness levels typically exceeding 1500 HV) distributed inside a tough, support-providing austenitic matrix. The result is a deposited layer that scores exceptionally well on ASTM G65 dry sand/rubber wheel abrasion tests, preventing material loss from sliding, gouging, and grinding.
Achieves an optimal microstructural balance, embedding hard chromium carbides in a high-ductility matrix to resist micro-cracking propagation.
Eliminates the requirement for complex gas delivery systems, reducing set-up time and increasing deposition rates by up to 40% over manual stick electrodes.
Engineered core chemistry ensures low spatter levels and high recovery rates of alloying elements in the weld overlay.
Heavy machinery operating in primary sectors is constantly exposed to severe abrasion, impact, heat, and corrosive environments. From the copper mines of Chile and Australia to the cement processing facilities of Central Asia and the coal-fired power stations of Europe, equipment wear accounts for billions of dollars in annual maintenance and unscheduled downtime.
To combat this, maintenance engineers are shifting from simple component replacement to target-based surfacing remediation. High-quality self-shielded flux-cored wires allow for the selective depositing of wear-resistant coatings directly onto soft structural backings. Rather than purchasing entire components made of expensive alloys, manufacturers can use low-carbon structural steel (such as Q235B or ASTM A36) and apply a high-chromium overlay. This bimetallic approach provides the dual benefit of structural toughness (from the base plate) and severe wear resistance (from the hardfaced overlay).
Furthermore, the lack of gas shielding requirements is a major logistics benefit. In open-air mining environments, high wind speeds disperse shielding gas, leading to porosity and cracking in the weld metal. Self-shielded wires ensure weld deposit consistency even in wind speeds up to 15 m/s, offering reliable performance for on-site machinery repairs.
China, and specifically the industrial cluster in Hebei Province, has become the global hub for hardfacing material R&D and production. Tangshan Runxing Machinery Co., Ltd., based in Tangshan, Hebei, represents the pinnacle of this industrial concentration.
The efficiency advantages of Chinese factories stem from several integrated components:
First, **Raw Material Accessibility**: Hebei is China's steelmaking heartland. Direct access to high-grade base steels, combined with regional supply chains for ferroalloys (such as ferrochromium, ferroboron, and ferroniobium), significantly reduces transportation costs and material sourcing lead times.
Second, **Advanced Production Automation**: Leading manufacturers like Runxing utilize automated, continuous wire-drawing and flux-filling production lines. The flux powder is precisely metered and encapsulated in a steel strip wrapper, ensuring consistent wire diameter, uniform flux-to-steel ratios, and steady feeding characteristics during welding.
Third, **Rigorous Quality Control & Testing**: Modern Chinese plants employ inline monitoring systems to detect wire fill defects and physical abnormalities. Combined with batch testing using optical emission spectrometers, XRD diffraction (for carbide phase identification), and automated ASTM G65 testing rigs, Chinese manufacturers deliver products that meet or exceed international standards like DIN 8555 and AWS A5.21.
The key issue for any cement plant lies in the availability of critical equipment. The key to equipment availability is wear resistance, and the performance of wear-resistant products determines the operating time of critical equipment. Self-shielded wires are applied to vertical mill rollers, grinding table segments, and separator guides.
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Mine operators around the globe are seeking to increase productivity, profitability and sustainability. We help our partners achieve these goals by delivering the mining industry's most comprehensive and cost-effective wear solutions. Applied on excavator bucket lips, dragline buckets, truck bed liners, and high-stress sizing screen decks.
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In the steel industry, the use of equipment is even more brutal, involving raw minerals, high temperatures, corrosion and other working conditions. Hardfacing on sinter breaker bars, blast furnace distribution chutes, continuous caster guide rollers, and hot shear blades significantly extends system lifespan.
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Wear protection for fan blades, conveyor chutes and hopper liners, crushers, coal mills, dust removal systems, conveyor systems. Self-shielded wire allows for fast, on-site refurbishment of coal pulverizer components, preventing unplanned plant outages.
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Ports are mainly to transport various materials. Conveying equipment, loading and unloading equipment, as well as yard stacking and picking equipment, is the main force of port operations, and the damage of these equipment directly affects the benefits. Self-shielded hardfacing prevents marine-abrasive degradation.
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The wear-resistant alumina ceramic is made of high purity superfine alumina powder and sintered at high temperature by an optimized formula, providing a complementary option for applications involving high chemical corrosion combined with dry sliding wear.
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Our engineering team continuously records performance data across dozens of active sites globally. More comprehensive case studies are systematically updated as field trials finish.
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We partner with universities and metallurgists to document microstructure behavior, publishing comprehensive engineering results. Updates are continuously shared here.
Read technical documents >Founded in 2010, Tangshan Runxing Machinery Co., Ltd. is a specialized manufacturer based in Tangshan, Hebei Province, focusing on the R&D, production, and on-site construction service of hardfacing wear-resistant metal products. Under the corporate philosophy of **"Integrity, Superior Quality, Innovation & Sustainable Development"**, we have developed advanced metal surface hardfacing technologies designed for high-stress industrial applications.
Our core product portfolio includes chromium carbide overlay (CCO) wear plates, custom-processed wear liners, wear-resistant pipes, hardfacing flux-cored welding wires, automatic hardfacing welding machines, and specialized roll surfacing repair services. We deliver customized solutions to heavy industries around the globe, with a strong market footprint in Russia, Central Asia, and beyond.
Global Logistics and Trade Architecture: All export operations are managed by Hebei Yuwan International Trade Co., Ltd. This dedicated trading entity coordinates customs clearance, maritime shipments, documentation, and secure payment processing. This structure allows our manufacturing facility to focus entirely on R&D, production consistency, quality control, and on-time delivery.
Our digital platform (www.runxing-machinery.com) entered its trial operation phase. It provides a comprehensive digital catalog, technical specifications, and application guides for procurement teams seeking hardfacing materials and bimetallic wear solutions.
Exhibiting at Johannesburg, South Africa, Runxing presented its high-chromium self-shielded flux-cored wire series and high-hardness CCO liners, establishing new partnerships across the African mining belt.
Yuan Shaoqiang (Dean of Tangshan University), Li Jing (Vice Dean), and Professor Yang Yuehui (Team Leader of Metal Materials and Forming Technology) conducted a research visit. We reviewed and optimized metallurgical formulations for next-generation wear plates.
Since 2019, Tangshan Runxing has maintained a partnership as an authorized agent for VAUTID, integrating premium German welding technology into customized wear protection designs.
Runxing participated in South America's major mining exhibition, demonstrating wear solutions tailored for the copper, gold, and iron ore extraction industries.
Unlike gas-shielded wires (FCAW-G), self-shielded wire (FCAW-S) contains gas-generating agents in its core. Under the arc's heat, these decompose to create a localized protective shield. This design prevents wind from dispersing the shield, making it suitable for field applications like mining chutes or hopper repairs.
Standard hardened steels (like AR400 or AR500) derive their hardness from heat-treatment processes. However, this hardness can degrade when exposed to heat or severe abrasion. CCO wear plates contain primary chromium carbides (Cr7C3) within an iron matrix, offering stable wear resistance up to 600°C.
VAUTID is an international brand in metal hardfacing. Being an authorized VAUTID agent for six consecutive years shows that Runxing meets strict quality standards, using premium raw materials and precise manufacturing processes.
The hairline cracks visible on the surface of CCO plates are check cracks. They are formed during the cooling process to relieve residual thermal stresses. These cracks do not compromise the plate's performance; instead, they prevent warping and cracking of the backing plate.
To ensure compliant international trade, all export business is handled by Hebei Yuwan International Trade Co., Ltd. They manage customs clearance, logistics, documentation, and payment processing, allowing our factory to focus on manufacturing.
Composite material wearplate made of a structural steel backing & a hard weld surfacing, corresponding to DIN 8555 standards.
RX has many years of experience and solutions for making machinery and equipment, machining accessories, and engineering projects.
Comprehensive repair solutions for cast steel rolls and vertical mills. Runxing extends equipment life and reduces maintenance overhead.
Continuous-cast core wire designed for automated rebuilds. Provides deposition control and weld-puddle stability.
Available in multiple spool weights and wire diameters. Specially packaged to protect against environmental moisture absorption.
High-density carbide distribution minimizes matrix wear, even under high pressure and abrasive flow.
Optimized for processing machinery in cement mills and iron sintering plants, reducing component replacement frequency.
Heavy-duty surfacing composite plates designed to withstand impact and sliding wear under severe operating conditions.
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