由于含铌铁素体不锈钢抗热疲劳和抗氧化性能优越,所以在诸如汽车排气系统的排气岐管等管件上被广泛应用。这些形状复杂的管件是由管厂提供的钢管加工而成的,所以,要求作为坯料的钢管的加工性能要好。到目前为止,对钢板加工性能的报导较多,但对钢管加工性能的报导较少。日本日新 Because niobium-containing ferritic stainless steel is superior in thermal fatigue resistance and oxidation resistance, it is widely used in pipe fittings such as an exhaust manifold of an automobile exhaust system. These complex pipe fittings are machined from steel pipes supplied by the tube mills, so that the machinability of steel pipes used as blanks is good. So far, there have been many reports on the processing performance of steel sheets, but there have been few reports on the processing performance of steel pipes. Japan and Japan