Heat Treatment Carburizing Salt Bath Formulation

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A liquid salt bath carburizing agent, bath salt formula and method of preparation Carburizing is the process of changing the chemical composition and structural level of the austenite steel surface by the infiltration of carbon or carbon and nitrogen. In the carburizing salt bath formulation the  workpiece quality of carburization treatment is directly related to engineering equipment quality and service life.
The surface carbon concentration of the carburizing part is low, the fatigue strength of the work surface will be reduced; And the carbon content is too high, then easily produce lattice or massive carbide on the surface, increase the working surface. Generally, the mechanical efficiency normalizing the carburizing part top layer carbon content level is preferably between 0.8-1.0%, not limited to.

Carburizing is a heat treatment process

It is used to introduce carbon into the surface layer of low-carbon steel or iron alloys. This process aims to increase the hardness, wear resistance, and strength of the material. The carburizing process typically involves the following steps:

  1. Part Preparation: The steel parts to be carburized are thoroughly cleaned to remove any contaminants such as oil, grease, or scale. Proper cleaning is essential for effective carburizing.
  2. Carburizing Medium: Carburizing can be performed using various mediums, including gas, liquid, or solid carburizing agents. The choice of carburizing medium depends on factors such as the desired carburizing depth, material composition, and process requirements.
  3. Heating: The parts are heated to a temperature typically between 850°C (1562°F) and 950°C (1742°F) in a controlled atmosphere. This temperature range allows the carbon to diffuse into the surface of the material.
  4. Carburizing Time: The parts are held at the carburizing temperature for a specific duration, which can range from several hours to several days, depending on the desired depth of the carburized layer.
  5. Carbon Diffusion: During the heating and holding period, the carbon atoms from the carburizing medium diffuse into the surface of the material. The carbon concentration is higher at the surface and gradually decreases towards the core, creating a hardened and carbon-enriched layer known as the “case.”
  6. Quenching: After the carburizing process, the parts are rapidly cooled by quenching them in a suitable medium, such as oil or water. Quenching helps to harden the carburized layer and transform the microstructure of the material.
  7. Post-Treatment: Depending on the specific requirements, the carburized parts may undergo additional processes such as tempering, stress relieving, or machining. These steps help to achieve the desired final properties, dimensional stability, and remove any residual stresses.

Heat treatment product guide

Carburizing salt bath formulation is commonly used in the manufacturing of gears, shafts, bearings, and other components that require high surface hardness and wear resistance. The process can be tailored to achieve different carburizing depths, allowing for flexibility in meeting specific engineering requirements.

It’s important to note that carburizing is a specialized heat treatment process that requires expertise, controlled atmosphere, and precise temperature and time parameters. Working with high temperatures and potentially hazardous materials requires proper safety precautions. Therefore, it is recommended to consult with experienced heat treatment professionals or service providers to ensure the correct implementation of the carburizing process for specific materials and applications.

There is more hardness and wear ability, and the heart part has more stiffness, the load that can withstand shocks, and the fatigue strength is higher. Therefore, when carrying out the carburizing thermochemical treatment, it is very important to control the carbon concentration on the surface of the carburizing part, and the control carburizing part surface carbon concentration, the control atmosphere can be by the carbon capacity, the control surface of the work. There is a sense of depth of penetration. Because the control of the depth of the workpiece is difficult to ensure accurate, for ordinary technical staff, this operation is very difficult.