Explanation

steel with eutectic structure (ledeburite) in its structure in the foundry state. The non-alloy steel with more than 2.11% carbon content will undergo eutectic phase transformation and obtain part of ledeburite structure during solidification, but such high carbon content non-alloy steel is usually not used because of poor plasticity and toughness. The eutectic carbon content of steel can be reduced by adding a large amount of alloy elements, so the current ledeburitic steel is mainly high alloy steel. After heat treatment, steel containing troostite structure has high hardness, wear resistance and red hardness, and is widely used to make various molds and cutting tools.

Classification