High-phosphorus steel plate of weather-proof structure and method for preparing steel plate
A structural steel plate and weather-resistant technology, which is applied in the production process of high-phosphorus weather-resistant structural steel plate, can solve the problems of high alloy composition and increased production cost, and achieve improved weather resistance, excellent welding performance and formability, and good comprehensive mechanical properties. Effect
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[0027] The steel plate of this embodiment is prepared by the following method:
[0028] Hot metal pretreatment → 120t converter smelting → LF refining → RH refining → slab continuous casting → slab slow cooling → slab cleaning → heating → descaling → rough rolling → finishing rolling → hot straightening → steel plate identification → steel slow cooling → Cut → mark → put in storage.
[0029] See Table 1-3, this embodiment 1-3 are all produced according to the above process, the main chemical composition of steel is shown in Table 1, the actual production process is shown in Table 2, the mechanical properties of steel are shown in Table 3, the near surface, The microstructures at 1 / 4 and 1 / 2 thickness are shown respectively Figure 1-3 . It can be seen that the metallographic structure of the trial steel plate is composed of ferrite and pearlite, the ferrite grains are uniform and fine, and the pearlite clusters are dispersedly distributed on the ferrite matrix, which provides gol...
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