Steel matrix
The steel matrix is the continuous base structure of a steel, consisting of ferrite or other phases such as pearlite, bainite, or martensite. It influences the mechanical properties and can be altered by heat treatment.
Physical-Chemical Mechanism of Action
The steel matrix consists of a continuous metallic network determined by various phases such as ferrite, pearlite, bainite, or martensite. These phases arise from the microscopic structure of the steel and influence its mechanical properties like hardness, elasticity, and strength.
Metallurgical Relevance & Welding Risks
Choosing the right heat treatment is crucial for the quality of the steel matrix. Too rapid cooling can lead to a martensitic structure that is hard and prone to cracking, while too slow cooling results in a softer pearlite or bainite. This affects the mechanical strength and the service life of the weld.
Workshop Practice & Action Guidelines
To achieve an optimal steel matrix, control the cooling rate precisely. For high-strength applications (e.g., in machine building), it is important to cool the weld quickly to avoid martensite. For softer applications (e.g., in construction), you should cool more slowly to get pearlite or bainite. Use special cooling devices like cooling pans or cooling pipes and pay attention to correct temperature control.