Dual-phase steel continuous annealing and galvanizing heat simulation experiment method and device

Abstract

The invention relates to a dual-phase steel continuous annealing and galvanizing heat simulation experiment method and device, and belongs to the technical field of metallurgical plate production. According to the technical scheme, three sets of thermocouples are used for heating a thermal simulation sample, two cooling nozzles are arranged, the cooling speed of different parts in the thermal simulation experiment process is controlled, and after the sample obtained after the thermal simulation experiment is machined into a tensile sample, the tensile test fracture position is just located at the temperature control thermocouples. The method has the beneficial effects that the strength obtained by the tensile test can truly reflect the influence of the change of the soaking temperature in the thermal simulation test on the material performance.

Description

technical field [0001] The invention relates to a dual-phase steel continuous annealing and galvanizing thermal simulation experiment method and device, belonging to the technical field of metallurgical plate production. Background technique [0002] Duplex steel is generally produced by continuous annealing (continuous annealing) and galvanizing methods, so its final performance is determined by continuous annealing and galvanizing process parameters. Continuous annealing and galvanizing processes are similar and different, but the basic principle is to heat the steel to a partial austenitizing temperature, hold it for a certain period of time, and then quickly cool it to a certain temperature to obtain a martensite or bainite structure, and finally After cooling to room temperature, the final structure is ferrite + martensite. Among them, the amount and hardness of martensite or bainite are important factors affecting the strength of dual-phase steel. The amount of marten...

AI Technical Summary

Problems solved by technology

[0004] However, the problem is that when a single cooling nozzle is used, the cooling rate of different parts of the thermal simulation sample is different, and the cooling rate determines the hardness of the martensite.

However, due to the use of a single cooling nozzle, the cooling speed of different parts of the thermal simulation sample is different, so if figure 2 , it cannot guarantee that the fracture position of the tensile sample is at the temperature control thermocouple, and the accuracy of the thermal simulation experiment cannot be guaranteed.

Images