45nicrmo16 hot work die steel is a high-quality heat treatment tool steel, which is widely used in the manufacture of various hot work molds. The steel is favored for its excellent high-temperature properties, wear resistance and thermal fatigue resistance. The detailed parameters of 45nicrmo16 hot work die steel will be introduced in detail below.
1. Chemical composition.
The main chemical components of 45NICRMO16 hot work die steel include carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni) and molybdenum (Mo). The proper ratio of these elements makes the steel have excellent thermal stability and wear resistance.
2. Physical properties.
1.Density: The density of 45nicrmo16 hot work die steel is about 785g cm, which makes it have good stability and bearing capacity when manufacturing molds.
2.Coefficient of thermal expansion: The coefficient of thermal expansion of the steel is moderate, and it can maintain good dimensional stability in a high-temperature environment.
3.Thermal conductivity: 45nicrmo16 hot work mold steel has good thermal conductivity, which helps to reduce the thermal stress concentration of the mold during the working process.
3. Mechanical properties.
1.Tensile strength: The tensile strength of 45nicrmo16 hot work die steel is high, which can meet the strength requirements of the mold under various working conditions.
2.Yield strength: The yield strength of the steel is also excellent, and it can maintain good stability when subjected to external forces.
3.Elongation: The elongation of 45nicrmo16 hot work die steel is moderate, so that the mold has a certain plastic deformation ability when subjected to external force.
4.Impact toughness: The steel has good impact toughness and is able to resist damage when subjected to impact loads.
Fourth, heat treatment process.
The heat treatment process of 45NICRMO16 hot work die steel includes steps such as quenching, tempering and surface treatment. Through a reasonable heat treatment process, the hardness, wear resistance and thermal fatigue resistance of the steel can be further improved.
1.Quenching: The quenching temperature is generally between 900-950, and the holding time depends on the thickness and size of the steel. The quenching medium is usually oil or water to obtain the ideal quenching structure and hardness.
2.Tempering: The tempering temperature is generally between 500-700, and the appropriate tempering temperature is selected according to the requirements of the mold. Tempering can improve the toughness, thermal fatigue resistance and dimensional stability of steel.
3.Surface treatment: In order to improve the wear resistance and corrosion resistance of the mold, the 45nicrmo16 hot work mold steel can be carburized, nitrid and other surface treatments. These treatments can form a layer of hard and wear-resistant compound on the surface of the steel, which can increase the life of the mold.
Fifth, the field of application.
45nicrmo16 hot work die steel is widely used in the manufacture of various hot work molds, such as die-casting molds, forging molds, hot extrusion molds, etc. Their excellent high-temperature performance, abrasion resistance and thermal fatigue resistance allow these molds to maintain a long service life in high-temperature, high-pressure and high-wear working environments.
In a word, 45nicrmo16 hot work die steel occupies an important position in the field of heat treatment tool steel due to its excellent properties. Through reasonable heat treatment process and surface treatment, its performance can be further improved to meet the requirements of various complex working conditions.