Marine crankshaft forging is the core component of Marine engine, its quality is directly related to the efficiency and safety of the ship. Therefore, strict quality control and inspection of Marine crankshaft forgings is very important. This paper will introduce the quality control and inspection method of Marine crankshaft forgings in detail.
Quality control
Raw material control: Use high-quality steel as raw materials to ensure that its chemical composition and mechanical properties meet the design requirements. Strict quality inspection of raw materials, including chemical composition analysis, mechanical properties testing, etc., to ensure stable and reliable quality.
Forging process control: In the forging process, strictly control the heating temperature, deformation, forging speed and other parameters to ensure the quality and performance of the forging. At the same time, the forging equipment is regularly maintained and checked to ensure its normal operation.
Heat treatment process control: Heat treatment is an important link in the manufacturing process of crankshaft forgings, which requires strict control of heating temperature, holding time and cooling speed and other parameters. Perform regular maintenance and inspection on heat treatment equipment to ensure its normal operation.
Machining process control: In the machining process, select the appropriate tool and cutting parameters, and strictly control the processing error. Perform regular maintenance and inspection on the processing equipment to ensure its normal operation.
Inspection method
Appearance inspection: Appearance inspection of crankshaft forgings, including surface quality, dimensional accuracy, etc. Through visual or magnifying glass observation, check whether there are cracks, pores, slag inclusion and other defects.
Dimension measurement: Use measuring tools to measure the dimensions of crankshaft forgings, including diameter, length, Angle, etc. Ensure dimensional accuracy meets design requirements.
Hardness test: The hardness of crankshaft forgings is tested through a hardness tester to evaluate its wear resistance and fatigue resistance.
Non-destructive testing: The use of non-destructive testing technology, such as ultrasonic testing, X-ray testing, etc., to detect internal defects of crankshaft forgings. Ensure internal quality meets requirements.
Mechanical properties testing: Tensile, impact, bending and other mechanical properties of crankshaft forgings are tested to assess their bearing capacity and durability.
Quality control and inspection of Marine crankshaft forgings is the key link to ensure product quality. Through strict control of raw materials, manufacturing process control and inspection methods, the quality and performance of crankshaft forgings can be ensured to meet the design requirements. At the same time, with the development of science and technology and the continuous improvement of inspection methods, the quality control and inspection of Marine crankshaft forgings will be more accurate and efficient.
