论文部分内容阅读
采用扫描电子显微镜、X射线衍射、光学显微镜等方法,研究了新型马氏体时效不锈钢热脆性产生的原因、条件和消除热脆性提高材料韧性的途径。研究结果表明,本钢种从1100℃以上高温缓慢冷却或是在奥氏体化温度以上长期停留,将会由于N_b(C,N)粒子析出,而导致沿晶断裂。 抑制第二相粒子沿晶界析出,通过再结晶细化晶粒,是提高材料韧性的重要途径。
Using scanning electron microscopy, X-ray diffraction, optical microscopy and other methods to study the new maraging stainless steel hot brittleness causes and conditions and eliminate hot brittleness to improve the material toughness approach. The results show that the slow cooling of Benxi Steel from above 1100 ℃ or the prolonged stay above the austenitizing temperature will cause the intergranular fracture due to the precipitation of N_b (C, N) particles. Inhibit the second phase particles along the grain boundary precipitation, grain refinement by recrystallization is an important way to improve the toughness of the material.