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Heat treatment

We can supply following heat treatment services:

Normalizing, Annealing, Quenching, Tempering, Carburizing, Nitriding, High-frequency surface hardening and other processing services.

We can satisfy the customers' further use of the products by heat treatment

Normalizing

Normalizing is a heat treatment process for making material harder and refining the grain size .

A material can be normalized by heating it to a specific temperature and then letting the material cool to room temperature outside of the oven. This treatment refines the grain size and improves the uniformity of microstructure and properties of steel.

Annealing

Annealing is a heat treatment process used to improve the properties of metals and alloys, especially their ductility and toughness. The process involves heating the material to a specific temperature, holding it at that temperature for a set period of time, and then cooling it slowly in order to achieve a desired microstructure and mechanical properties.

During annealing, the internal structure of the material is changed by changes in its crystal lattice. Annealing can reduce the internal stresses of the material and increase its ductility and toughness, making it more suitable for deformation processes.

 

Annealing refers to a heat treatment process for metal materials. Common forms of annealing include:

Full Annealing: The material is heated to a sufficiently high temperature and then cooled slowly. It can improve the material’s toughness and machinability.

Normalizing Annealing: Similar to full annealing, but the material is allowed to cool naturally to below room temperature before being quenched. This is often used for heavy steel parts to increase their strength and hardness.

Spheroidizing Annealing: The material is heated close to its critical temperature and then allowed to cool slowly. It can make carbon evenly distributed and form smooth geometric shapes, thereby improving its processing performance.

Aging Annealing: The material is heated to a specific temperature and held at that temperature for a period of time to allow alloying elements in its solid solution to precipitate, thereby changing its physical and mechanical properties.

Stress-Relief Annealing: The material is heated to an appropriate temperature and then cooled slowly to eliminate any stress or defects in the material. It can improve the material’s machinability and corrosion resistance.

These forms of annealing can be chosen based on different types of metals and specific application scenarios to achieve the best results.

The duration and temperature of both stages of the QT process are carefully controlled to achieve the desired material properties. QT can improve the material’s yield strength, tensile strength, toughness, and resistance to impact and fatigue.

QT

Quenching and tempering

QT is an abbreviation for “Quenching and Tempering.” It refers to a heat treatment process used to improve the mechanical properties of materials, particularly steel.

During the quenching stage of QT, the material is heated to a specific temperature and then rapidly cooled by immersion in a quenching medium such as water or oil. This quenching process causes the material to become very hard and brittle.

Next, the material undergoes tempering, which involves reheating it to a lower temperature and holding it there for a specified amount of time. The purpose of tempering is to reduce the brittleness caused by the quenching process, while maintaining some of the hardness and strength gained during the first stage of heat treatment.

 

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