Rare-earth-treated HB 500-grade high-wear-resistance steel plate and production method thereof
A high wear resistance, rare earth technology, applied in the direction of metal rolling, etc., can solve the problems such as the hardness index of the core that is not mentioned, and achieve the effects of ensuring hardness consistency, improving weldability, and increasing service life
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Embodiment 1
[0038] The weight percentage of the chemical composition of the steel plate is shown in Table 1 below. The exit temperature of the slab heating furnace is 1210°C, two-stage rolling is adopted, and the rough rolling start temperature is 1150°C. The finish rolling temperature is 845°C, no cooling control is required after rolling, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 867°C, heat preservation 20min quenching, cooling rate 40°C / s; tempering process: 204°C, heat preservation 30min air cooling. Finally, the steel plate can be obtained, and the metallographic structure photo of the steel plate is as follows figure 1 As shown, it can be seen that the metallographic structure is martensite and retained austenite. figure 2 It is the surface scanning component analysis result of this steel plate, it can be seen that this steel type contains rare earth elements.
Embodiment 2
[0040] The weight percentage of the chemical composition of the steel plate is shown in Table 1 below. The heating furnace temperature of the slab is 1205°C, and the slab is rolled in time after heating. Two-stage rolling is adopted, and the starting temperature of rough rolling is ≥1160°C. The finish rolling temperature is 835°C, the thin gauge does not need cooling control, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 862 ℃, heat preservation 30min quenching; tempering process: 210 ℃, heat preservation 50min air cooling. Finally, the steel plate can be obtained.
Embodiment 3
[0042] The weight percentage of the chemical composition of the steel plate is shown in Table 1 below. The heating furnace temperature of the slab is 1205°C, and the slab is rolled in time after heating. Two-stage rolling is adopted, and the starting temperature of rough rolling is ≥1160°C. The finish rolling temperature is 840°C, the thin gauge does not need cooling control, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 854°C, heat preservation 40min quenching; tempering process: 204°C, heat preservation 70min air cooling. Finally, the steel plate can be obtained.
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