Manufacturing method of compound steel

Abstract

The invention provides a manufacturing method of compound steel, which comprises the following steps: leveling a steel plate and matrix steel, removing an oxide layer on the binding surface of the required steel plate and the matrix steel, and decontaminating so that the binding surface is smooth and flat; superposing the steel plate and the matrix steel, wherein the contact area of the binding surface of the required steel plate and the matrix steel reaches 100%, and no air exists on the binding surface; welding and fixing the transverse seams of the binding surface to obtain a blank; and heating the blank to 950-1000 DEG C in a furnace for 20-30 minutes so that the temperatures inside and outside the blank are uniform, rolling in a hot-rolling mill, and carrying out stress relief annealing by a conventional method, thereby obtaining the compound steel of the invention. The invention has the advantages of simple manufacturing technique, is easy to realize the industrial production and high yield, and enables the yield of compound steel to reach 100% due to the realization of non-oxidation manufacture in the compounding process.

Description

technical field [0001] The invention relates to a method for manufacturing composite steel, which belongs to the field of metal material manufacturing. Background technique [0002] Due to its good wear resistance, drawing performance, hardness, toughness and other advantages, composite steel is applied to various fields of industry and civil use, such as construction, chemical machinery, storage and transportation, electric power, etc. At present, composite steel manufactured in China is roughly Divided into: traditional forging method, explosive forming method and casting composite method. The traditional forging method is to heat the two steels to a certain temperature, forge them with a pressure hammer to make them into one, and then roll them. In this method, because the temperature of the two steels and the forging time and times of the pressure hammer are not easy to grasp, the two steels contain gas and ash, and secondary heating is required during rolling, which is...

AI Technical Summary

Problems solved by technology

However, due to the difference in melting point between the clad metal and the base steel, on the one hand, it is easy to cause melting loss at the joint part of the two metals during casting, and the composite interface is prone to oxidation; on the other hand, when the two metals are melted and recombined at high temperature, As a result, the carbon atoms in the high-carbon steel diffuse violently to the low-carbon steel, resulting in a decrease in the carbon content of the required steel. Secondly, the liquid-solid phase composite also has gas inclusions, dust inclusions, and poor reworkability at the composite interface. The material combination size and A series of problems such as low steel ratio accuracy and poor uniformity

Therefore, it is difficult to produce high-quality composite steel, and the manufacturing process of liquid-solid phase composite is relatively complicated