💡Manganese is added to steel to make it stronger, last longer, and tougher. The strength of the liner plate means how well it holds up under pressure, without breaking, and it depends on what the metal looks like under a microscope. Manganese steel is very hard and can resist wear and tear.
Spotlight on Austenitic Manganese Steel: Strength and Flexibility Combined
Austenitic Manganese Steel, a material known for its strength and resilience, is the star of our discussion today. The hardness of this steel starts at a modest rating of about 220-250 HV. However, as it undergoes wear and tear, the hardness of Austenitic Manganese Steel increases, making it even better at resisting damage.
Manufacturing Manganese Steel: A Detailed Look
The journey to crafting this robust steel is quite interesting. Firstly, the right materials have to be picked. Then, these components are melted down in a controlled setting. Following this, the liquefied mix is poured out, under close watch. The final steps consist of heat-treating, processing, and shaping the steel to make it a perfect fit for the crusher. Each stage is vital in ensuring the end product is top-notch and can endure significant wear and tear.
The Power of Work Hardening
Next, we explore work hardening. This process enhances the strength of the manganese steel liner, making it more capable of resisting impact and compression loads. The depth and hardness of the work-hardened surface can differ based on the grade of the manganese steel and where it’s used. In some cases, it can reach a depth of up to 10-15 mm and a hardness as high as 600 HV.
Understanding Penetration Hardening
Now, let’s move to penetration hardening. This phase can lead to a decrease in the core toughness of manganese steel. While the surface of manganese steel needs to be hard and wear-resistant, the core should stay flexible. If used wrongly, the core could risk losing its inherent toughness.
Quick Facts about Manganese Steel Liners
Here are a few things worth noting about manganese steel liners:
- They can harden during the crushing process, which helps them last longer.
- The liner hardens under pressure, and at any given time, the hardened surface is around 2-3 mm thick.
- Liners with more manganese harden faster. For example, liners with 12-14% manganese content harden slower than those with a 20-24% manganese content.
- Steel with less manganese is more resistant to wear once it hardens. So, steel with 12-14% manganese content is more resistant to wear than steel with 16-18% manganese content.
Extending the Life of Manganese Steel Liner
To help your manganese steel liner last longer, keep these tips in mind:
- Use the right feeder to lessen the entry of small wet materials into the crushing chamber.
- Keep the crushing chamber running at the optimal speed. Doing so helps prevent friction between the materials and the liner, which could cause early wear.
- Rotate the jaw crusher liner early. This helps harden the crushing surface effectively.
Essential Points on Manganese Steel Heat Treatment
To get Austenitic Manganese Steel to austenitize, you need a temperature of at least 1080°. The length of the treatment depends on the thickness of the manganese steel liner. For the best results, the grain size should be less than 3mm.