How to choose the wear-resistant steel NM400 suitable for mining machinery?

The selection of wear-resistant steel NM400 suitable for mining machinery can be comprehensively considered from the following aspects: 

1、 Performance aspect Hardness: The wear-resistant components of mining machinery often need to withstand high-strength wear from hard materials such as ores, so the surface hardness of wear-resistant steel NM400 is crucial. Generally speaking, a Brinell hardness of 360-450HB is more suitable, as this hardness can effectively resist the friction and cutting of ores, and extend the service life of components. 

Resilience: Mining machinery not only experiences wear and tear on its components during operation, but may also be impacted by ores. For example, the bowl wall of a cone crusher will experience significant impact force when crushing ore. Therefore, wear-resistant steel needs to have good toughness to absorb impact energy and prevent cracking and fracture. 

strength: Some structural components of mining machinery, such as frames, need to withstand large loads. Wear resistant steel should have sufficient strength to ensure the stability and safety of the structure.

2、 Chemical composition Carbon content: The carbon content has a significant impact on the hardness and strength of wear-resistant steel. A moderate carbon content (usually around 0.25% -0.35%) can ensure a certain level of toughness while achieving high hardness, avoiding material hardening and brittleness. Excessive carbon content can make the material too brittle and hard, making it prone to fracture upon impact; However, a low carbon content will reduce the hardness and wear resistance of the material. 

3、 Quality and reliability Manufacturer: Choosing a well-known and reputable manufacturer can ensure stable quality of wear-resistant steel. Understand the production equipment, process level, quality control system, etc. of the manufacturer to ensure their ability to produce high-quality wear-resistant steel.

Quality inspection: Require manufacturers to provide quality inspection reports for wear-resistant steel, including chemical composition analysis, mechanical property testing, hardness testing, metallographic structure analysis, etc., to ensure that the material meets relevant standards and requirements. When necessary, the purchased wear-resistant steel can be randomly inspected or entrusted to a third-party testing agency for testing to verify the quality of the material.

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