As a key component in mechanical equipment, the stability and reliability of the performance of valve body connecting shaft are crucial. In the processing process, heat treatment and surface treatment are two indispensable links, but they may also have a certain influence on material properties. Therefore, taking effective measures to avoid or reduce these influences is the key to ensuring the quality of valve body connecting shaft.Heat treatment is an important step in the processing of valve body connecting shaft. It mainly improves its hardness, wear resistance and fatigue resistance by changing the microstructure of the material. However, the heat treatment process may also lead to problems such as increased brittleness of the material and residual stress. In order to avoid these negative effects, it is necessary to strictly control the heat treatment process parameters, such as heating temperature, holding time and cooling rate. At the same time, the method of tempering after quenching can also be used to eliminate residual stress and improve the toughness of the material.
Surface treatment is an important means to improve the corrosion resistance and wear resistance of valve body connecting shaft. Common surface treatment methods include sandblasting, electroplating, spraying and carburizing. However, these treatment methods may also have a certain influence on material properties. For example, hydrogen embrittlement may occur during the electroplating process, resulting in increased material brittleness; the coating may not bond well with the substrate during the spraying process, affecting the sealing and service life of the valve body connecting shaft.
In order to effectively avoid or reduce the impact of heat treatment and surface treatment on material properties, the following strategies can be adopted:
Optimize heat treatment process parameters to ensure uniform heating, adequate insulation, and moderate cooling rate to reduce the brittleness and residual stress of the material.
Select a suitable surface treatment method and strictly control the process parameters during the treatment process, such as the composition of the plating solution, the type of spray coating, and the dilution ratio, to ensure good bonding and corrosion resistance between the coating and the substrate.
Carry out necessary inspections and tests before and after heat treatment and surface treatment, such as hardness tests, tensile tests, fatigue tests, etc., to evaluate the performance changes of the material and adjust the process parameters in a timely manner.
Strengthen quality control and traceability management in the production process to ensure that each processing link meets quality requirements to improve the overall performance and reliability of the valve body connecting shaft.
In summary, by strictly controlling the process parameters of heat treatment and surface treatment, selecting appropriate treatment methods, and strengthening quality control and traceability management, the impact of these treatments on the material properties of valve body connecting shaft can be effectively avoided or reduced, thereby ensuring its quality and reliability.
