Marine crankshaft forging is the key part of Marine power system, its quality is of great significance to the efficiency and safety of ship operation. In order to ensure the quality of Marine crankshaft forgings, it is necessary to carry out strict quality inspection and evaluation. This paper will discuss the quality inspection and evaluation method of Marine crankshaft forgings.
Quality inspection
Appearance inspection: The appearance of Marine crankshaft forgings is tested, including surface roughness, cracks, pores, etc. Through visual inspection and magnifying glass observation, defects and damage on the forging surface can be found.
Size detection: the size of Marine crankshaft forgings is tested, including length, diameter, thickness, etc. The forging is accurately measured by measuring tools to ensure that its dimensions meet the design requirements.
Mechanical properties testing: The mechanical properties of Marine crankshaft forgings are tested, including strength, toughness, hardness, etc. By means of tensile test, impact test, hardness test, we can evaluate whether the mechanical properties of forgings meet the design requirements.
Non-destructive testing: The use of non-destructive testing technology for Marine crankshaft forgings internal defects detection, such as ultrasonic testing, ray testing, etc. The defects such as cracks and pores in the forging can be found through non-destructive testing to ensure the quality and safety of the forging.
Quality assessment
Evaluation standards: Develop quality evaluation standards for Marine crankshaft forgings, including appearance, size, mechanical properties, non-destructive testing and other requirements. Quality assessment of forgings according to evaluation criteria to ensure that they meet design requirements.
Evaluation process: Establish the quality evaluation process of Marine crankshaft forgings, including sample collection, testing, data analysis, result evaluation and other steps. Through the strict evaluation process, the quality of forgings can be comprehensively and objectively evaluated.
Data analysis: Statistical analysis of the data obtained from the detection test, such as average value, standard deviation, pass rate, etc. Through data analysis, we can know the mass distribution of forging parts and provide basis for quality improvement.
Result evaluation: According to the evaluation criteria and data analysis results, the quality of Marine crankshaft forging is evaluated. For qualified products, can be put into use; For unqualified products, they need to be reworked or scrapped.
Quality inspection and evaluation of Marine crankshaft forgings is an important link to ensure product quality. The quality of forgings can be evaluated comprehensively and accurately by means of appearance testing, dimension testing, mechanical property testing and non-destructive testing. At the same time, the establishment of strict quality assessment standards and processes, data analysis and result evaluation, help to improve product quality and ensure the safe operation of ships.
