1、 Common grades of free cutting steel

There are various grades of free cutting steel, and the common grades are as follows:

1. 12L14 steel: sulfur-containing free cutting steel, the addition of sulfur can reduce the friction coefficient and improve cutting performance;

2. Y15 steel: sulfur-containing white cut free cutting steel, the addition of sulfur can improve cutting performance;

3. SUM24L steel: The amount of sulfur added is relatively small, but the addition of lead can improve cutting and processing performance;

4. Y12Pb steel: This steel not only has easy cutting performance, but also has certain ductility and toughness.

2、 Performance characteristics of free cutting steel

Free cutting steel mainly has the following performance characteristics:

1. High cutting performance: The cutting performance of free cutting steel is very good, so it is easy to machine into various shapes of parts;

2. Excellent surface quality: The surface quality of free cutting steel after processing is very good and easy to carry out precision machining;

3. Good machining performance: The cutting performance of free cutting steel is very good, so the heat and chip amount generated during the machining process are less, which can improve production efficiency;

4. Low mechanical performance: The mechanical performance of free cutting steel is relatively low, so it is usually used to manufacture parts with less stringent working conditions.

3、 Application fields of free cutting steel

Free cutting steel is a very common type of steel, widely used in the manufacturing of mechanical parts, aviation components, automation equipment and other fields. Meanwhile, free cutting steel is also a high-quality tool material commonly used in the manufacture of various cutting tools.