Metallurgical bonding double-metal stainless steel cladding reinforcing steel bar and preparation process thereof

Abstract

The invention discloses a metallurgical bonding double-metal stainless steel cladding reinforcing steel bar and a preparation process thereof. The metallurgical bonding double-metal stainless steel cladding reinforcing steel bar comprises a carbon steel core part and a stainless steel cladding. The composite forming process comprises the following steps: integrally heating an outer-layer stainless steel pipe to 600 to 1000 DEG C by using an induction heater, pouring into inner-layer carbon steel, performing metal liquid casting and manufacturing an interface metallurgical bonding cladding type double-metal composite blank; hot-rolling the cast double-metal blank to form cladding double-metal round steel and threaded steel. The metallurgical bonding interface of the stainless steel layer and the carbon steel core is formed by casting, and the advantages of high bonding strength, excellent processing property, dense structure, high quality, few procedures, low cost, high efficiency and the like are achieved. The integral stainless steel reinforcing steel bar is replaced by the double-metal reinforcing steel bar, so on the premise of guaranteeing the corrosion-resistant characteristic of the reinforcing steel bar, the stainless steel material is saved, the engineering cost is reduced, the strength of the reinforcing steel bar is effectively improved, waste of resource and energy and environmental pollution are reduced, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to a metal composite material, in particular to a metallurgically bonded double-metal stainless steel cladding steel bar and a preparation process. Background technique [0002] Reinforced concrete usually uses ordinary carbon steel bars as the skeleton. Generally, ordinary carbon steel bars have better corrosion resistance in concrete, because steel bars will form a dense passivation film in a highly alkaline environment, and this layer of dense passivation film will prevent the occurrence and development of corrosion . However, once the concentration of chloride ions in concrete exceeds a certain critical value, the stability of this passivation film will drop sharply or even be broken down, which will eventually lead to obvious corrosion of steel bars, and the expansion of corrosion products will lead to performance degradation of the structure. It accelerates the failure of the reinforced concrete structure and seriously sho...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the deficiencies of the prior art, to solve the problems of high corrosion resistance of stainless steel bars but high cost; low cost of carbon steel bars but poor corrosion resistance, and to provide a cost-effective and good corrosion resistance and A metallurgical combination of bimetallic stainless steel clad steel bar and its preparation process for oxidation performance, which can obtain good corrosion resistance and low cost, and can produce stainless steel clad ribbed steel bar and round steel bar in batches

Images