Advanced high strength steel and segmented preparation method and application thereof
A high-strength steel and advanced technology, applied in the field of preparation of advanced high-strength steel, can solve the problems that the performance requirements of the third-generation advanced high-strength steel cannot be well met, and the lifting effect of advanced high-strength steel is limited, and achieves excellent mechanical properties. performance, optimized micro-topography, reduced impact effects
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[0040] It can be seen that the advanced high-strength steel of the present invention has a controlled composition, which needs to be combined with a controlled treatment process to produce the desired phase structure and mechanical properties. The above-mentioned advanced high-strength steel of the present invention is now further analyzed. The segmental preparation method of strength steel is described, mainly including the following aspects:
[0041] In the present invention, before carrying out the second stage treatment, the Ac 1 Above, Ac 3 In the following two-phase region, the spheroidizing process of the metal carbide is carried out for a long time. Based on the aforementioned composition design, if only the second-stage process is carried out, it is difficult to control the precipitated metal carbides and their morphology. Since the second stage is mainly for austenitization, manganese partitioning and carbon partitioning processes, there is no special treatment for ...
Embodiment 1
[0059] A segmented preparation method for advanced high-strength steel, comprising the steps of:
[0060] (1) Heat the A1 sample with the composition shown in Table 1 at 760°C for 110 minutes, then cool it down to 700°C and hold it for 180 minutes, then air cool to room temperature after completion.
[0061] (2) Reheat the steel plate treated in step (1) to 860°C for 10 minutes, then quench in a salt bath to 260°C for 30 seconds, and finally place the sample in tap water at room temperature and quench to room temperature.
Embodiment 2
[0063] A segmented preparation method for advanced high-strength steel, comprising the steps of:
[0064] (1) The A2 sample with the composition shown in Table 1 was kept at 765°C for 120 minutes, then cooled to 710°C and kept for 160 minutes after completion, and air cooled to room temperature after completion.
[0065] (2) Reheat the steel plate treated in step (1) to 850°C for 15 minutes, then quench in a salt bath to 260°C for 40 seconds, and finally place the sample in tap water at room temperature and quench to room temperature.
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