Zhuojin Pipe Fitting Co., LtdDevelopment of High Wear-Resistant Surfacing-Free Cement Roller Press Alloy Sleeve with Industrial Validation
Literature Overview
This paper by Li Baoshi, Guo Hualou, Dong Liang, and Wang Guoju, published in China Foundry Equipment and Technology (2026, Vol. 61, No. 2, pp. 96-99), presents a significant engineering achievement: the development of a three-layer composite roller sleeve for cement roller presses that eliminates the need for traditional surfacing (overlay welding) altogether. The work is a collaboration between Xingtai Roller Special-Shaped Roller Co., Ltd., the State Key Laboratory of Composite Materials for Rollers, and Xingtai Roller Line and Bar Roller Co., Ltd. This represents a paradigm shift from repair-oriented to design-oriented approaches in cement grinding equipment.
Technical Approach
Three-Layer Composite Design
The roller sleeve features a novel three-layer architecture:
| Layer | Material | Function |
|---|---|---|
| Outer layer | High Carbon High Vanadium (HCHV) ternary alloy | Wear resistance |
| Middle layer | Transition alloy | Stress buffering and bonding |
| Core | Low-alloy steel | Structural strength and cost efficiency |
Manufacturing Process Innovation
The study introduces two coupled manufacturing innovations:
- Turbulent chills casting (turbulence inoculated centrifugal casting): This technique promotes uniform nucleation and grain refinement throughout the casting, leading to more homogeneous microstructure and properties.
- Differential temperature heat treatment: By applying different cooling rates to different regions of the casting, tailored microstructures can be achieved in the outer, middle, and core layers.
Microstructural Results
The turbulent chills casting process produced significant improvements in the outer layer microstructure:
| Microstructural Parameter | Traditional Method | New Method | Improvement |
|---|---|---|---|
| MC carbide average size | 28.7 μm | 22.1 μm | 23% reduction |
| MC carbide volume fraction | Baseline | +19% | Significant increase |
The reduction in MC carbide size while increasing volume fraction is particularly important for wear resistance, as finer and more uniformly distributed carbides provide better resistance to abrasive wear without creating stress concentration points.
Performance and Economic Validation
Laboratory Performance
The relative wear resistance of the new alloy sleeve is 6.42 times that of traditional surfacing layers, representing a dramatic improvement in wear life.
Field Performance
Industrial validation over 3000 days of continuous operation demonstrated:
- 36 months surfacing-free operation: Eliminating the need for periodic overlay welding repairs.
- Cost per ton of cement: Reduced to 0.38 yuan, a 46% reduction compared to traditional surfacing roller sleeves.
- Application scope: Successfully deployed in production lines of large domestic and international cement groups.
Engineering Practice Implications
This work has profound implications for cement industry equipment engineering:
- Life-cycle cost reduction: The elimination of surfacing repairs dramatically reduces maintenance downtime and associated costs. For a typical cement plant with multiple roller presses, the annual savings can be substantial.
- Reliability improvement: Surfacing-free operation eliminates the risk of surfacing-related defects such as delamination, cracking, and spalling that can cause unplanned downtime.
- Manufacturing scalability: The turbulent chills casting combined with differential temperature heat treatment represents a scalable manufacturing approach that can be applied to various roller diameters and lengths.
- Sustainability benefits: Reduced maintenance frequency translates to lower energy consumption and carbon emissions associated with repair operations, aligning with the cement industry's decarbonization goals.
Key Process Parameters for Industrial Implementation
| Parameter | Specification | Criticality |
|---|---|---|
| Roller sleeve dimensions | Ø1800 mm × 1700 mm | Standard cement plant specification |
| Outer layer alloy | High carbon, high vanadium (HCHV) | Wear resistance critical |
| Casting method | Turbulent chills centrifugal casting | Microstructure control |
| Heat treatment | Differential temperature | Property tailoring |
| Service life target | ≥36 months without surfacing | Economic viability |
Study Insights and Reflections
This paper represents a mature engineering solution that has successfully transitioned from laboratory development to industrial deployment. The 3000-day field validation provides strong confidence in the technology's reliability and economic benefits.
The approach of designing wear resistance into the base material rather than adding it through surfacing is philosophically sound and aligns with modern manufacturing principles of reducing assembly operations and improving reliability. The three-layer composite design elegantly addresses the competing requirements of wear resistance (outer layer), structural integrity (core), and bonding compatibility (middle layer).
One area for future development is the application of this technology to other roller press applications beyond cement grinding, such as mineral processing, steel industry hot rolling, and bulk material handling. The fundamental principles of turbulent chills casting and differential temperature heat treatment are transferable to other wear-critical components.
The 6.42× improvement in relative wear resistance is remarkable and suggests that further optimization of the HCHV alloy composition could yield even greater performance gains. Engineers involved in cement equipment procurement and maintenance should seriously consider this technology as a replacement for traditional surfacing roller sleeves, particularly given the proven 46% cost reduction per ton of cement produced.