What Are The Precautions for Selecting Core Components of High Hardness Ore Cone Crushers?

Core conclusion: The selection of accessories for high hardness ore cone crushers should revolve around the three core principles of "adapting to working conditions, balancing performance, and avoiding shortcomings", while balancing practicality and economy.

1. Material performance balance is the core, avoiding extreme single indicators

We cannot only pursue high hardness while neglecting toughness, otherwise accessories are prone to fracture under ore impact (such as high chromium cast iron that needs to be matched with alloy elements to improve toughness).

It is necessary to strengthen the anti fatigue performance. When high hardness ores are crushed, the accessories bear continuous alternating loads, and the anti fatigue strength needs to be optimized through material alloying (adding Cr, Mo) and heat treatment.

To avoid "heavy hardness and light wear resistance", attention should be paid to the work hardening ability of the material (such as high manganese steel) or the content of wear-resistant phases (such as composite wear-resistant steel).

2. Strictly match ore characteristics with crushing conditions

When the hardness of the ore is ≥ Mohs 8, ordinary high manganese steel as a single material is prohibited, and composite materials (such as high manganese steel+wear-resistant alloy layer) or high-strength alloy steel should be selected.

For scenarios with large feed particle size and high impact load, priority should be given to materials dominated by toughness (such as 42CrMo alloy steel); The grinding load during the fine crushing stage is large, with a focus on high hardness and wear-resistant materials (such as high chromium composite cast iron).

High abrasive ores such as silicon and quartz require an increase in the proportion of wear-resistant elements (Cr, W, V) in the material to avoid rapid wear of the lining plate.

3. Processing and heat treatment processes cannot be ignored

High manganese steel must undergo water toughening treatment to eliminate carbide precipitation and ensure work hardening effect after impact; Alloy steel requires quenching and surface hardening to improve surface hardness and core toughness.

To avoid casting defects (porosity, shrinkage), defects under high hardness conditions can accelerate component cracking, and casting process accuracy needs to be controlled.

Composite materials need to ensure the strength of the bonding surface to prevent the wear-resistant layer from falling off during use (such as using metallurgical composite technology).

4. Balancing cost and lifespan, refusing to blindly choose expensive options

It is not necessary to select top-level materials for all accessories. High end alloys are preferred for core load-bearing components (eccentric shaft, crushing wall), and wear-resistant cast iron with higher cost-effectiveness can be used for auxiliary protective plates.

Compared to "single purchase cost+replacement frequency", although composite materials have a higher initial cost, their lifespan is 2-3 times that of ordinary materials, making them more economical in the long run.

5. Matching adaptability: Avoid "performance mismatch" between accessories

Spherical tiles and bearing materials need to be compatible with eccentric shafts (such as GCr15 bearing steel paired with 42CrMo shafts) to prevent bite wear under high loads.

The hardness of the lining material should be lower than that of the crushing wall/rolling bowl wall to avoid mutual grinding and loss.