In the operation and maintenance field of mining crushing equipment, concave liners, mantle liners and jaw plates for jaw crushers serve as core wear-resistant components. Their service stability directly determines the continuous operation efficiency and comprehensive operation costs of production lines. According to the 2025 China Wear-Resistant Materials Industry Development White Paper released by the China Machinery Industry Federation, high-quality wear-resistant parts can reduce crusher downtime for maintenance by more than 40% and cut annual comprehensive operation and maintenance costs by 30% to 35%.
Faced with harsh working conditions such as crushing high-hardness materials and long-term heavy-load operation, Shenyang Shilong Machinery has achieved dual breakthroughs in technology and quality for its concave liners, mantle liners and jaw plate products, relying on years of experience in material R&D and precision manufacturing. It provides high-reliability wear-resistant solutions for mining enterprises around the world.
Material Formula Innovation: Building an "Industrial Shield" Adapted to Heavy-Duty Working Conditions
With 26 years of deep cultivation in the wear-resistant materials field, Shilong has broken through the performance bottlenecks of traditional high manganese steel materials and developed customized core material formulas for different crushing scenarios. The company's concave liners and mantle liners mainly adopt Mn18Cr2 ultra-high manganese steel. Compared with the conventional Mn13 material used in the industry, by optimizing the carbon-manganese ratio and adding chromium elements for reinforcement, the material's work hardening performance has been significantly improved.
Under the impact load of hard rocks such as granite and basalt, the surface hardness can quickly rise to over HB500, and the impact toughness is stably maintained at 45J/cm². The wear resistance is 45% higher than that of ordinary high manganese steel parts, effectively solving the industry pain point of rapid wear and frequent replacement of traditional parts under strong abrasive working conditions.
To address the problems of easy edge chipping and insufficient impact resistance of jaw plates for jaw crushers, Shilong adopts a dual-material structural design of "high manganese steel + composite reinforced layer". The surface layer is integrated with vanadium and titanium microalloy elements to form dispersed carbide particles, which improves hardness and wear resistance through precipitation strengthening mechanism. The core retains the excellent toughness of high manganese steel, achieving a performance balance between wear resistance and impact resistance.
On-site application data from an iron mine in Shanxi Province shows that after adopting Shilong's composite reinforced jaw plates, the service life of the parts has been extended from 800 hours of traditional products to 1800 hours, the replacement frequency has been reduced by 55%, and the annual maintenance cost of a single production line has been cut by nearly 200,000 RMB.
Precision Manufacturing and Structural Optimization: Improving Adaptability and Service Life through Detail Control
In terms of manufacturing processes, Shilong has introduced a full-process CNC machining system. The concave liners, mantle liners and jaw plates are all precision-machined by five-axis CNC machine tools, with dimensional tolerances strictly controlled within ±0.05mm. This ensures a perfect fit with crusher components such as the main shaft and frame, avoiding local stress concentration and abnormal wear caused by excessive installation gaps.
At the same time, the product structure is optimized based on finite element analysis technology. The stress-weak areas of concave liners are thickened, the mantle liners adopt a streamlined cavity design, and the tooth shape of jaw plates is optimized into a "step-type occlusal structure". This not only improves material crushing efficiency but also reduces component wear rate, extending the overall service life by more than 35% compared with the industry average.
It is worth noting that Shilong has innovatively adopted a dual heat treatment process of "on-line quenching + tempering". By precisely controlling the quenching temperature and tempering time, the uniformity of the internal structure of parts has been improved by 30%, effectively avoiding the common industry problem of "hard surface and soft interior" of thick plate parts.
Verified by the third-party testing agency SGS, the hardness fluctuation of Shilong's wear-resistant parts is strictly controlled within ±15HBW, far better than the ±25HBW required by the national standard GB/T 24186-2009. The parts still maintain good toughness at a low temperature of -20℃ without the risk of brittle fracture, adapting to mining operation scenarios under different climatic conditions around the world.
Full-Process Quality Control: Building a Reliability Line of Defense for Products with Strict Standards
Quality stability is the core competitiveness of wear-resistant parts. Shilong has established a full-process quality control system covering "raw material procurement - production and manufacturing - finished product inspection". Raw materials are all high-purity steel billets from well-known steel mills such as Angang Steel and Baosteel, with phosphorus and sulfur impurity contents strictly controlled (P≤0.015%, S≤0.005%), ensuring stable product performance from the source.
During the production process, each process is equipped with full-time quality inspectors, who monitor product quality in real time through infrared temperature measurement, ultrasonic flaw detection and other technologies. Before leaving the factory, finished products must pass 12 strict inspections including hardness testing, wear resistance testing and dimensional accuracy testing, with a qualification rate of 100%.
At present, Shilong's concave liners, mantle liners and jaw plates have passed ISO 9001:2015 quality system certification and OHSAS18001 occupational health and safety certification. They are widely compatible with crushers of Shilong's own brand and internationally renowned brands such as Metso, Sandvik and Symons. The products are exported to more than 20 countries and regions including Indonesia, India, South Africa and Australia, serving more than 3,000 mining and aggregate production enterprises worldwide.
The person in charge of a granite mine on Java Island, Indonesia, commented: "Under the working condition of 12 hours of heavy-load operation per day, Shilong's wear-resistant parts have been used continuously for 10 months without obvious abnormal wear. The operation stability of the equipment has been greatly improved, reducing a lot of downtime losses for us."
Conclusion: Technology Empowers Value, Quality Wins the Market
Against the backdrop of the intelligent and efficient upgrading of mining equipment, the technical content and quality level of wear-resistant parts have become an important embodiment of enterprises' core competitiveness. With material innovation, structural optimization and strict quality control as the core, Shilong continues to promote the technological upgrading of crusher wear-resistant parts, winning recognition from global customers with solid product performance and application cases.
If your mine or aggregate production line is facing problems such as frequent replacement of wear-resistant parts and high operation and maintenance costs, welcome to visit the official website of Shenyang Shilong Machinery or contact our technical team. We provide customized wear-resistant part solutions and free technical consulting services, helping your enterprise achieve cost reduction and efficiency improvement through efficient and stable production.
