Method for preparing large-specification thin-composite-layer nickel-based alloy and pipeline steel composite plate

Abstract

The invention discloses a method for preparing a large-specification thin-composite-layer nickel-based alloy and pipeline steel composite plate. The method comprises the following steps that 1, a nickel-based alloy plate serving as a composite layer and a pipeline steel plate serving as a base layer are composited to prepare composite board blank through explosion welding; 2, a leveling treatment is carried out on the composite board blank, and then a heating treatment is carried out on the composite board blank; 3, a cooling treatment is carried out on the heated composite board blank; and 4, the composite board blank which is subjected to the cooling treatment is fed into an asynchronous rolling mill for asynchronous rolling to obtain the nickel-based alloy and pipeline steel composite plate, wherein the shearing strength of the nickel-based alloy and pipeline steel composite board is not less than 210 MPa, the total rolling reduction ratio of asymmetrical rolling is 50%-90%, and the different speed ratio of each pass of the asynchronous rolling mill is 1.05-1.30. According to the method for preparing the composite plate, the corrosion resistance of the nickel-based alloy plate serving as the composite layer is ensured, and the tensile property and the impact toughness of the pipeline steel plate serving as the base layer are ensured; and the bonding strength and other properties of the composite plate can meet the requirements specified in the NB / T47002.2 standard, and even the requirement for rolling force of the rolling mill is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite plate manufacturing, and in particular relates to a method for preparing a large-scale, thin-clad nickel-based alloy / pipeline steel composite plate. Background technique [0002] Nickel-based alloy / pipeline steel clad plate has good corrosion resistance, especially CO 2 and H 2 S corrosion performance and high impact toughness of pipeline steel, so it is widely used in petroleum pipeline, chemical industry, marine engineering and other industries. [0003] Under the premise of satisfying the service performance, the thin-clad nickel-based alloy / pipeline steel composite plate can further reduce the manufacturing cost. With the continuous development of our country's economy, the development trend of large-scale equipment is becoming more and more obvious, and the demand for thin-clad nickel-based alloy / pipeline steel composite panels is becoming increasingly urgent. [0004] Large-scale, thin-...

AI Technical Summary

Problems solved by technology

The method of explosive welding + rolling can take advantage of the two methods of explosive welding and rolling, but it is difficult to produce large-scale, thin-clad nickel-based alloy / pipeline steel clad plates that meet various requirements by conventional rolling processes, such as The warping problem caused by the uncoordinated deformation of nickel-based alloy and pipeline steel not only makes it difficult to carry out the rolling process smoothly, but also makes it difficult to ensure the plate shape. Board yield is low

Moreover, in general, the rolling temperature of nickel-based alloy and pipeline steel is the same in the traditional rolling process. Since the optimal rolling temperature ranges of the two metals are different, it is difficult to make the nickel-based alloy after rolling by the traditional rolling process. The microstructure and properties of pipeline steel can meet the requirements