What factors affect the toughness of NM400 wear-resistant steel?

The main factors affecting the toughness of NM400 wear-resistant steel are:

1、 Chemical composition

Carbon content: Excessive carbon content can reduce toughness.

Alloy elements: such as manganese can improve toughness, and a reasonable ratio of alloy elements can balance hardness and toughness.

2、 Heat treatment process

Quenching temperature and cooling rate: too high or too fast will reduce toughness.

Tempering temperature and time: Proper tempering can improve toughness.

3、 Microstructure

Grain size: Fine grains have good toughness.

Organizational morphology: Bainite, tempered martensite and other microstructures have good toughness.

4、 Processing technology

Rolling process: Reasonable rolling can improve toughness.

Welding process: It affects the toughness of welding joints and requires the use of appropriate processes to reduce brittle structures.

5、 Usage environment

Temperature: Low temperature is brittle, and high temperature also affects toughness.

Corrosive medium: will reduce toughness, anti-corrosion measures need to be taken.

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