Nbc nano-particle reinforced steel plate for X90 plastic pipes and manufacturing method of steel plate
A technology of nano-particles and steel plates, applied in the field of metal materials, can solve problems such as differences, achieve the effects of reducing production costs, excellent HIC resistance, and meeting safety requirements
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[0037] The present invention will be further illustrated by the following examples.
[0038] According to the composition ratio of the technical solution, the embodiment of the present invention performs materials preparation → converter or electric furnace smelting → external refining → casting → slab reheating → controlled rolling → controlled cooling → solution treatment → isothermal heat treatment → water cooling to Room temperature,
[0039] (1) Slab reheating: After the slab is cleaned, it is reheated, and the slab discharge temperature Tso is 1150~1220℃;
[0040] (2) Controlled rolling: rough rolling final rolling temperature Trf≥1000°C; intermediate billet thickness t'to be warmed is 2.5t~4.0t, t is the thickness of finished steel plate; finishing rolling temperature Tfs is 800~900℃, fine The final rolling temperature Tff is 720~820℃;
[0041] (3) Controlled cooling: the opening cooling temperature Tcs is 720~800℃, the final cooling temperature Tcf is 300~500℃, and the coolin...
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