SAE1045 medium carbon steel has moderate strength and hardness, suitable for general engineering applications. SAE1045 is easy to machine and has good cutting performance, suitable for manufacturing various parts and tools. SAE1045 has good toughness and can resist stress such as impact and compression to a certain extent.

Due to its moderate carbon content, SAE1045 has a certain degree of wear resistance and is suitable for applications that require resistance to friction and wear.

Usage:

Manufacturing mechanical parts: SAE 1045 steel is widely used in the manufacturing of mechanical parts, such as bearings, pins, gears, connecting rods, etc.

Making cutting tools and blades: Due to its good machinability, SAE 1045 steel is suitable for manufacturing various cutting tools, such as blades, drills, and tool blades.

Mold making: SAE1045 can be used to make some molds, such as stamping molds, plastic injection molds, etc.

Part processing: SAE1045 is suitable for mechanical processing of various parts, such as bolts, nuts, pins, etc.

Forgings: SAE1045 is suitable for manufacturing forgings of various shapes, and its performance can be adjusted through appropriate heat treatment to achieve the required hardness and strength.

The heat treatment methods of SAE1045 include annealing, normalizing, and quenching.

1. Annealing: Heat SAE1045 to a temperature range of approximately 800 ° C-900 ° C, hold for a certain period of time, and then slowly cool down. Annealing can eliminate stress, improve the toughness and workability of steel. The annealing process generally includes full annealing and spheroidization annealing.

2. Normalization: Heat SAE 1045 to a temperature range of approximately 830 ° C-900 ° C, hold for a certain period of time, and then cool it by air cooling. Normalization can improve the hardness and strength of steel, but it has better toughness compared to quenching.

3. Quenching: Heat SAE 1045 to an appropriate temperature (usually 830 ° C-900 ° C), then quickly cool to room temperature or a low-temperature medium such as water, oil, or salt water. Quenching can rapidly form martensitic structure in steel, thereby improving its hardness and strength. However, quenching can make the steel brittle, and tempering is usually required to improve its toughness.

4. Tempering: Reheat the quenched SAE1045 to a temperature range of approximately 150 ° C-500 ° C and maintain it for a certain period of time before cooling. Tempering can reduce the internal stress formed during the quenching process, improve the toughness and elongation of steel, and is suitable for some applications that require both hardness and toughness.

Yield strength: 330~450MPa

Tensile strength: approximately 650-850 MPa

Elongation rate: ≥ 14%, depending on the heat treatment and processing conditions of the material

Hardness: usually 170-210HB