High-strength flexible stainless steel and stainless steel part made of high-strength flexible stainless steel

Abstract

The invention provides high-strength flexible stainless steel which comprises the following components in percentage by mass: more than 0 and less than or equal to 0.050% of C, more than 0 and less than or equal to 1.00% of Si, 8.00%-15.00% of Mn, less than or equal to 0.045% of P, less than or equal to 0.030% of S, 13.00%-18.00% of Cr, 4.00%-8.00% of Ni, 1.50%-4.00% of Cu, more than 0 and less than or equal to 0.050% of N and the balance of Fe and inevitable impurities. The stainless steel part for tunnel repair comprises a semicircular arch part, the arch part is formed by combining a left quarter ring and a right quarter ring, the left quarter ring and the right quarter ring are a left arch part and a right arch part respectively, and the arch part is of a U-shaped structure with an upward opening. The upper end of the left arch part and the upper end of the right arch part are each provided with a first connecting hole, the first connecting holes penetrate through the arch parts in the front-back direction, the two ends of the connecting part are inserted into the two first connecting holes to be used for connecting the left arch part and the right arch part, the two ends of the connecting part extend to the outer sides of the arch parts, and the two ends of the connecting part are connected with connecting discs in a sleeved mode. The connecting disc is welded with the connecting piece, the left arch piece and the right arch piece.

Description

technical field [0001] The invention relates to a high-strength flexible stainless steel and a stainless steel part made thereof. Background technique [0002] With the continuous improvement of my country's urbanization level, my country will build a large number of urban roads, tunnels and urban rail transit infrastructure, and invest more and more in infrastructure construction, among which the construction of roads, railways and urban underground railways account for a large For a certain proportion, a fast and smooth transportation network has become one of the indispensable conditions for economic construction and development. With the rapid development of my country's social economy, it took less than 40 years to build a large-scale urban traffic infrastructure implementation group. External influences such as dense buildings in the surrounding area, dense traffic and crowded roads, complex operating environment, increasing number of severe disasters, and insufficient ...

AI Technical Summary

Problems solved by technology

With the rapid development of my country's social economy, it took less than 40 years to build a large-scale urban traffic infrastructure implementation group. External influences such as dense buildings in the surrounding area, dense traffic and crowded roads, complex operating environment, increasing number of severe disasters, and insufficient management and maintenance levels make its operation and maintenance safety hazards very prominent.

In my country, due to the relatively late start of the research and development of prefabricated high-strength flexible steel structures, the theoretical level and the development of standard systems are not perfect, the theoretical research and engineering applications of prefabricated steel structures are mainly concentrated in the field of bridge and culvert engineering, and the research results are quite limited.

In particular, the engineering application of prefabricated high-strength flexible steel structures is still mainly limited to small-span closed structures, and the application of large-span open heterogeneous structures is extremely scarce, and the research and application in existing tunnel repair projects is even more difficult. scarcity

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