1.前言捧材与其它钢材相比,不仅品种、钢种多,且用途更为广泛。通常,热轧捧材还需进一步进行各种加工,为了降低成本,切削加工常常被冷锻代替。为此,对作为冷加工坯料的棒材的质量要求更加严格,因此,棒材的无损检测技术被积极采用。本文介绍适用于棒材生产及二次加工过程中的无损检测技术。 1. Introduction Preserving materials compared with other steel, not only species, steel and more, and uses more widely. In general, the hot-rolled products also need further processing, in order to reduce costs, cutting is often replaced by cold forging. For this reason, the quality requirements of bars as cold-worked blanks are stricter, so nondestructive testing of bars is actively used. This article describes non-destructive testing techniques suitable for bar production and secondary processing.