A kind of low compression bit thickness low alloy steel plate and its manufacturing method
A shrinkage and low-alloy technology, which is applied in the field of ultra-thick low-alloy steel plate and its low compression ratio controlled rolling, can solve the problems of high production cost, poor practicability, low compression ratio, etc., and achieve the reduction of production cost , Excellent overall performance, and the effect of improving weldability
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[0034] Below in conjunction with embodiment the present invention is described in further detail.
[0035] Embodiments 1-3 are low-pressure, bit-thick, low-alloy steel plates, respectively, and the main production process is smelting in a 150-ton oxygen converter→refining in a ladle furnace→vacuum degassing treatment→continuous casting of 370mm thick slab→cooling the slab→heating the slab →Controlled rolling→Controlled cooling→Stacking slow cooling→Flaw detection→Performance inspection.
[0036] The smelting chemical composition of embodiment 1-3 and comparative example is shown in Table 1:
[0037] Table 1 Melting chemical composition (wt%)
[0038]
[0039] Table 1. Examples 1-3 all meet the chemical composition requirements of the present invention. Slabs with a thickness of 370mm are produced in strict accordance with the process of the present invention. The steel ingots with a large head diameter of 850mm are produced in comparative examples according to the electric...
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