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检查零件热处理质量是保证产品质量的重要一环。测定碳钢的含碳量、零件的硬度和表面硬化层深度等是最常用、最普遍的检查项目,目前多用破坏性方法检查。但这种方法不适用大量成品和半成品的检查,对于形状复杂的零件尤感困难,对大型工件的检测就更费时、费事,检查过程也难于实现自动化,花费成本高,不适用于产品的逐个检查。目前,无损检查技术的研究和发展很快,
Check the quality of parts heat treatment is to ensure product quality is an important part. Determination of carbon content of carbon steel, parts hardness and depth of hardened layer is the most commonly used, the most common inspection items, the current number of destructive methods to check. However, this method is not suitable for inspection of a large number of finished products and semi-finished products. It is particularly difficult for complex-shaped parts. Testing of large-sized workpieces is more time-consuming, laborious, and difficult to automate the inspection process, which results in high costs and is not suitable for product-by- an examination. At present, the research and development of NDT technology is fast,