Steelmaking method in vacuum induction furnace
A vacuum induction furnace and raw material technology, applied in the direction of furnace, electric furnace, furnace type, etc., can solve the problems of fast loss of crucible, difficulty of steel ingot, low production efficiency, etc., and achieve the effect of simple process and improved cleanliness
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Embodiment 1
[0027] This example illustrates in detail the method for making steel in a vacuum induction furnace provided by the present invention by preparing X100 pipeline steel.
[0028] The mass percentages of components required for X100 pipeline steel are: the content of C is ≤0.06 mass%, the content of Si is 0.15-0.30 mass%, the content of Mn is 1.80-2.00 mass%, the content of P is ≤0.010 mass%, the content of S Content ≤ 0.003 mass%, Mo content 0.15-0.25 mass%, Ni content 0.25-0.45 mass%, Cr content 0.15-0.25 mass%, Cu content 0.15-0.25 mass%, Nb content The content of V is 0.040-0.060% by mass, the content of V is 0.06-0.09% by mass, and the content of Ti is 0.010-0.025% by mass.
[0029] Because the X100 pipeline steel requires low C content, considering that both pure iron and the added alloy contain a certain amount of C, graphite is no longer added in the carbon preparation step.
[0030] 18 rod-shaped pure iron raw materials with a size of 3cm×3cm×22.6cm (C content is less t...
Embodiment 2
[0043] This example illustrates in detail the method for making steel in a vacuum induction furnace provided by the present invention by preparing X120 pipeline steel.
[0044] The mass percentages of components required for X120 pipeline steel are: the content of C is ≤0.06 mass%, the content of Si is 0.15-0.30 mass%, the content of Mn is 1.80-2.00 mass%, the content of P is ≤0.010 mass%, the content of S Content ≤ 0.005 mass%, Mo content 0.15-0.25 mass%, Ni content 0.25-0.45 mass%, Cr content 0.15-0.25 mass%, Cu content 0.15-0.25 mass%, Nb content The content of Ti is 0.040-0.060% by mass, the content of Ti is 0.010-0.025% by mass, and the content of B is 0.0010-0.0020% by mass.
[0045] Because X120 pipeline steel requires low C content, considering that both pure iron and the added alloy contain a certain amount of C, graphite is no longer added in the carbon preparation step.
[0046] Weld 10 rod-shaped pure iron raw materials with a size of 3.2cm×3.2cm×36cm (C content i...
Embodiment 3
[0052] In this example, the method for making steel in a vacuum induction furnace provided by the present invention is described in detail by preparing steel for engineering machinery with a yield strength of 800 MPa.
[0053] The mass percentages of components required for steel for construction machinery with a yield strength of 800MPa are: C content of 0.04-0.08 mass%, Si content of 0.15-0.30 mass%, Mn content of 1.60-1.80 mass%, P content of ≤ 0.015 mass%, S content ≤ 0.005 mass%, Mo content 0.15-0.25 mass%, Ni content 0.25-0.40 mass%, Cr content 0.30-0.40 mass%, Nb content 0.040-0.060 % by mass, the content of V is 0.06-0.09 mass % and the content of Ti is 0.010-0.025 mass %.
[0054] 24 rod-shaped pure iron raw materials with a size of 2.5cm×2.5cm×24.5cm (C content is less than 0.01 mass%, S content is less than 0.001 mass%) are welded by electric welding with CHE422 electrodes to a bottom area of 50cm 2 And the columnar pure iron raw material block with a height of 7...
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