Basic knowledge of professional ethics
The basic concept, significance and characteristics of professional ethics, as well as the basic norms of professional ethics, familiar with learning requirements. There are seven contents in the welder's professional code, which should be mastered in the study.
Map recognition knowledge
Through the study of mechanical drawing knowledge, we can cultivate the spatial imagination and conception ability of welders and master the basic methods of mechanical engineering drawing. Including the format, scale and drawing method of drawings, the basic knowledge of views, the representation method of parts drawings, the representation method of assembly drawings and dimensions, reading assembly drawings, and learning to know or be familiar with assembly drawings.
Knowledge of metals and heat treatment
Master the basic knowledge of microstructure of iron-carbon alloy and heat treatment of steel. Including the general knowledge of metal crystal structure, the basic knowledge of alloy structure and iron-carbon alloy, the structure and application of iron-carbon equilibrium state diagram, and the basic knowledge of steel heat treatment, you need to know or be familiar with it.
General knowledge of metal materials
Master the concept and classification of strength, plasticity, impact toughness and hardness in mechanical properties of metal materials, and the classification, brand and main properties of carbon structural steel and low-alloy structural steel. Including the physical, chemical and mechanical properties of metal materials, the classification of carbon steel and the representation of carbon steel brands, the classification of alloy steel and the representation of carbon steel brands, which need to be understood or mastered.