Situated in the northeastern corner of Equatorial Guinea within the Kié-Ntem Province, Ebebiyin serves as a vital economic crossroads and commercial transit hub connecting Equatorial Guinea with neighboring Cameroon and Gabon. As Central Africa accelerates regional infrastructure integration, highway network expansion, and resource extraction, Ebebiyin has emerged as a crucial staging ground for heavy machinery operation, construction material aggregate crushing, timber processing, and civil engineering projects.
However, the severe operating environment in the tropical rainforest zone of Kié-Ntem poses extreme tribological challenges to mechanical components. Mining hoppers, aggregate chutes, earthmoving buckets, and timber conveyor systems face a dual threat: continuous high-stress abrasive wear from quartzite and granite minerals, coupled with rapid surface oxidation driven by tropical high-humidity atmospheric conditions.
Standard structural carbon steel (Q235/Q355) and basic quenched wear-resistant steels (such as 400-500 HBW plates) frequently experience rapid thickness loss, localized gouging, and premature structural failure under heavy impact and slurry sliding conditions. By introducing advanced Bimetallic Chromium Carbide Overlay (CCO) Wear Plates manufactured via controlled submerged arc and open-arc hardfacing, operators in Ebebiyin can extend equipment operational life by 400% to 800%, drastically reducing unplanned downtime and field maintenance costs.
Engineered with a tough weldable steel base plate and a dense hardfacing alloy overlay. Offers superior defense against severe abrasive wear in mining chutes and cement hoppers.
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Precision-manufactured overlay plates featuring uniform bead geometry, microstructural relief cracking, and customizable alloy chemistry for specific thermal and stress demands.
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RX-m Series optimized for severe sliding abrasion with low-to-medium impact. Features high volume fraction of primary M7C3 carbides with hardness up to HRC 65.
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Custom fabricated wear liners designed to fit vertical mills, primary jaw crushers, and transfer hoppers across Central African mining and cement installations.
View Product DetailsThe exceptional resistance of Chromium Carbide Overlay (CCO) plates against high-stress grinding abrasion lies in its unique hypereutectic metallurgical structure. During the automated surfacing process, high-chromium flux-cored alloys are deposited onto a mild steel base (ASTM A36 / Q235B). As the weld pool cools, primary hexagonal Chromium Carbides (Cr7C3) crystallize within a tough, austenitic iron matrix.
While standard AR400/AR500 martensitic steel plates achieve microhardness around 400-500 HV, the primary M7C3 carbides embedded within Tangshan Runxing’s RX-wp series reach microhardness levels of 1700 HV to 2000 HV. These embedded carbides act as microscopic barriers that turn aside sharp mineral particles encountered during mining and earth-moving operations in Ebebiyin.
A common concern among maintenance engineers in Ebebiyin is the presence of fine transverse cracks on the hardfacing surface. In professional CCO plate manufacturing, these transverse cross-cracks are intentional and essential. Known as stress-relief cracking, they release interfacial shear stresses developed during alloy solid-solution contraction.
Crucially, these stress-relief cracks terminate precisely at the fusion boundary and do not propagate into the mild steel backing plate. This dual-structure engineering ensures that while the surface provides extreme hardness, the backing plate maintains full ductility, allowing for cold forming, plasma cutting, and back-welding directly onto equipment frames.
| Grade / Product Line | Hardness (HRC) | Carbide Volume Fraction | Continuous Temp Limit | Primary Applications in Ebebiyin |
|---|---|---|---|---|
| RXwp 7600 Standard CCO | HRC 58 - 62 | 30% - 40% Cr7C3 | 350 °C (662 °F) | Quarry chutes, loader buckets, aggregate hoppers, logging haulers |
| RXwp 7800 Complex Carbide | HRC 62 - 65 | 40% - 50% (Cr+Nb+V+B) | 550 °C (1022 °F) | Cement vertical mill liners, blast furnace skip cars, hot clinker chutes |
| RX-Wire Self-Shielded Hardfacing | HRC 55 - 62 | N/A (Deposited Weld) | 450 °C (842 °F) | On-site repair of excavator teeth, crusher rolls, slurry pump impellers |
Composite material wearplate made of a structural steel backing & a hard weld surfacing. RX®wp 7600 is a composite material made of a structural steel backing and a hard weld surfacing, corresponding to DIN 8555 standards.
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Self shielded flux cored wire. High chromium alloy designed for resisting high stress grinding abrasion with low impact. Engineered specifically for re-surfacing wear plates and heavy equipment components.
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Self shielded flux cored wire. High chromium alloy designed for resisting high stress grinding abrasion with low impact. Formulated to provide uniform hard overlays on severe-wear components.
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RX® Surfacing equipment featuring a 10.2-inch touch screen CNC unit and four independent welding guns. Highly automated system suitable for hardfacing composite plates, grinding rolls, and mill disks with maximum efficiency.
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Tangshan Runxing possesses extensive experience in custom fabrication, precision cutting, bending, countersinking, and manufacturing tailor-made wear liners for complex industrial assemblies.
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Specialized automated re-building and hardfacing repair services for steel mill rollers, coal grinding mill rolls, and vertical mill tables to significantly extend service lifespan and lower operational costs.
See more products >Founded in 2010 in Tangshan, Hebei Province—the heartland of China's heavy industrial manufacturing—Tangshan Runxing Machinery Co., Ltd. is a high-tech enterprise dedicated to research, development, production, and field installation of advanced hardfacing wear-resistant metal materials.
Our core capabilities span Chromium Carbide Overlay (CCO) wear plates, custom fabricated liners, wear-resistant pipes and fittings, hardfacing flux-cored welding wires, automated welding systems, and specialized roll surfacing repair services. Driven by our core philosophy of "Integrity, Superior Quality, Innovation & Sustainable Development", we deliver comprehensive wear protection across Central Africa, Russia, and Central Asia.
To guarantee full regulatory compliance, fast customs clearance, and secure international transactions for clients in Ebebiyin and Central Africa, all export operations are managed by our authorized export entity, Hebei Yuwan International Trade Co., Ltd. This strategic division enables our manufacturing facilities to focus entirely on quality assurance, alloy precision, and timely delivery.
Every batch of CCO wear plate produced for export to Equatorial Guinea undergoes rigorous quality inspection, including ultrasonic bonding tests, microstructural carbide density verification, and ASTM G65 dry sand abrasion testing.
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Equipment availability is paramount in cement production. Our hardfaced chutes, separator vanes, and vertical mill liners safeguard critical machinery from high-temperature clinker abrasion.
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Helping mining operators enhance profitability and equipment longevity with wear-resistant skip cars, truck bed liners, primary jaw crusher hoppers, and transfer drop chutes.
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Severe operating conditions involving raw ore sliding, elevated temperatures, and aggressive thermal shock demand complex carbide overlays engineered for extreme duty cycles.
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Complete wear protection for exhauster fan blades, pulverizer coal mill hoppers, biomass burner elbows, and dust extraction ductwork operating under high airflow velocity.
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Bulk material transportation equipment, grapple buckets, feeder hoppers, and vessel loading chutes engineered to resist saltwater atmospheric corrosion and abrasive impact.
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High-purity fine alumina ceramic liners sintered at extreme temperatures, serving as lightweight, ultra-hard solutions for fine particle pneumatic slurry conveying lines.
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CAD-designed prefabricated liner kits shipped directly to site in Ebebiyin, complete with countersunk bolt holes, bevel edges, and installation markings for rapid field fitting.
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Continuous research into complex metal matrix composites containing Boron and Titanium for extreme temperature applications exceeding 600°C.
Learn More >Refining primary chromium carbide grain size through precise addition of Niobium, Vanadium, and Titanium to create ultra-dense micro-structures resistant to micro-fracturing under high-impact conditions.
Deploying automated multi-pass 4-gun surfacing units equipped with real-time infrared weld pool monitoring to maintain exact dilution ratios and zero defect rates during full-scale plate production.
Providing mining and industrial outfits in Ebebiyin with portable self-shielded hardfacing wire systems that enable fast, high-performance field repair without requiring external shielding gases.
Recently, www.runxing-machinery.com, a platform dedicated to serving the wear-resistant industry, officially entered trial operation. Built by Tangshan Runxing Machinery Co., Ltd., the site provides one-stop procurement for wear solutions across global markets, including Ebebiyin and Central Africa.
From September 2 to 6, 2024, Runxing Machinery showcased flagship CCO plates and hardfacing wires at the Africa International Construction & Mining Machinery Exhibition in Johannesburg, establishing strong distribution channels for Central African industrial clients.
In 2023, Dean Yuan Shaoqiang and Professor Yang Yuehui from Tangshan University visited our facility. General Manager Li Xiuhua and Vice General Manager Cui Jianying presented our latest advancements in metal surfacing technology and composite material research.
Since 2019, Tangshan Runxing Machinery Co., Ltd. has continuously operated as a qualified agent for German VAUTID hardfacing materials, maintaining world-class metallurgical standards across our full range of manufactured CCO wear plates.
Consult directly with Tangshan Runxing Machinery’s engineering team for customized wear liner drawings, technical alloy selection, and factory-direct pricing for Central Africa.
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