论文部分内容阅读
在飞机制造中多年采用30XTCH2A钢的经验表明,在现有的制造工艺中它的生产可达到具有足够高的安全性能,如K_(IC)(断裂韧性)=N30-3115牛顿/毫米~2和瞬时抗断裂强度σ_B=1600-1850牛顿/毫米~2。随着材料强度的增加就很难维持这种高安全性能水平。在最近的十年里,由于进行了广泛而大量的研究使中合金化钢的最小强度等级已提高到σ_B=1950牛顿/毫米~2。如开发出新的经济型合金化高强度结构可焊钢BKC-8(σ_B=1800-2000牛顿/毫米~2)和BKC-9(σ_B=1950-2150牛顿/毫米~2(表1)。它们的高强度不亚于抗裂钢
Years of experience with 30XTCH2A steels in the manufacture of aircraft has shown that its production achieves sufficiently high safety performance in existing manufacturing processes such as K IC (fracture toughness) = N30-3115 N / mm 2 and Instantaneous rupture strength σ_B = 1600-1850 N / mm 2. As material strength increases, it is difficult to maintain this high level of safety performance. In the recent decade, the minimum strength grade of alloying steels has been increased to σ_B = 1950 Newtons / mm 2 due to extensive and extensive research. For example, a new economically alloyed high strength structural weldable steel BKC-8 (σ_B = 1800-2000 N / mm 2) and BKC-9 (σ_B = 1950-2150 N / mm 2) were developed. Their high strength no less than cracking steel