EnglishViews: 0 Author: Site Editor Publish Time: 2025-12-02 Origin: Site
Core feature: pragmatic design prioritizing resilience
Mn18Cr2 high manganese steel lining plate is a classic wear-resistant material scheme verified by long-term industrial practice. Unlike complex alloys or casting processes that pursue ultimate performance, its characteristic lies in achieving a recognized excellent balance between reliability, universality, and economy through balanced design of composition and process.
1. Ingredient characteristics: toughness oriented, stable and reliable
Adequate toughness reserve: Manganese content (≥ 18%) ensures stable single austenite structure, and after water toughening treatment, it has extremely high initial toughness (ak value usually ≥ 150J/cm ²), which can effectively absorb high impact energy through plastic deformation and prevent brittle fracture.
Chromium element optimization: About 2% of chromium element is solid dissolved in the austenite matrix, which plays a role in solid solution strengthening and grain refinement. It improves the yield strength and initial hardness of the material (HB 170-220) without significantly reducing toughness, and enhances the ability to resist intergranular corrosion.
Adaptive component window: This component system is mature and has relatively broad smelting control, resulting in small performance fluctuations and high stability for different batches of products.
2. Performance features: Adapting to various changes through "work hardening"
Core working mechanism: Mn18Cr2 liner plate does not rely on initial high hardness, but undergoes rapid transformation from surface austenite to hard martensite and induces a large number of dislocations when subjected to severe impact and compression during operation. The hardness can be significantly increased to HB 450 or above, forming a hardened layer that matches the working conditions.
The adaptability of "harder with grinding": This dynamic hardening characteristic enables it to adapt to fluctuations in particle size and hardness of crushed materials, especially when dealing with high hardness and impact materials such as granite and iron ore, exhibiting good adaptability.
3. Process and cost characteristics: mature and controllable, with excellent comprehensive benefits
High process maturity: using conventional sand casting and water toughening heat treatment processes, the production process is easy to control, the yield rate is high, and the supply cycle is relatively stable.
Comprehensive cost advantage: achieved excellent cost-effectiveness between material cost, manufacturing cost, and service life. For non extreme wear conditions, the total operating cost is often lower than many alternative materials with higher initial prices or more complex processes.
4. Application features: Reliable selection in general fields
Wide equipment adaptability: It is one of the mainstream choices for standard models of jaw crushers (especially dynamic jaw liners), medium and large cone breaking dynamic cone liners, impact crusher plate hammers, and other components.
The golden partner of classic working conditions: very suitable for rough and medium crushing stages with significant impact loads but not extreme material abrasion. It can provide stable and predictable service life when crushing various ores and rocks with compressive strength ≤ 250MPa.
Objective limitations and scientific selection tips
As a classic material, Mn18Cr2's characteristics also determine its application boundary:
Not suitable for low stress wear: Under low impact conditions dominated by abrasive cutting, its work hardening ability cannot be fully stimulated, and its wear resistance may not be as good as high chromium cast iron and other materials.
There are limitations when dealing with extremely hard and highly abrasive materials: when crushing ultra-high hardness materials (such as basalt, high quartz content ores) or highly abrasive materials, relying solely on work hardening may not be sufficient, and higher manganese chromium content (such as Mn22Cr2) or casting composite schemes need to be considered.
Specification dependent heat treatment: Its performance is entirely dependent on proper water toughening treatment. Improper heat treatment (such as prolonged time from furnace to water inlet or high water temperature) can lead to carbide precipitation, seriously damaging toughness and hardening potential.
summary
Mn18Cr2 liner represents a proven engineering philosophy: not pursuing the ultimate performance of individual items, but achieving overall reliability and optimal comprehensive economic benefits under real and variable working conditions through classic material science ratios. It is a robust choice that combines technological maturity, performance predictability, and procurement economy when dealing with most common medium to high impact crushing tasks.
