1982 Volume 68 Issue 13 Pages 1799-1807
Mechanism of stringy defect formation on hot extrusion of high chromium steels and its prevention methods were investigated.
It was estimated that stringy defect resulted from the strain in circumferential direction relatively larger than in extrusion direction.
Stringy defect can be prevented by refining the structure, i.e. promoting the precipitation of austenite or adding a carbide/nitride former element.