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D6A hot-rolled wide strip steel for thermometal saw blade backing material and production method thereof

A production method and wide-band steel technology, applied in the field of alloy structural steel, can solve the problems of limited production capacity and high energy consumption

Active Publication Date: 2017-05-31
湖南华菱涟源钢铁有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The production processes mentioned above are all electric furnace production processes, with high energy consumption and limited production capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: produce in 210t-2250mm production line.

[0051] Put 195 tons of molten iron, 25 tons of scrap steel, 2.5 tons of molybdenum-iron alloy and 1.0 ton of nickel-iron alloy into a 210-ton converter, smelt for 35 minutes and tap the steel. The mass content of carbon at the end of the molten steel is 0.11%. Add ferrosilicon, ferromanganese, pot iron and high-carbon ferrochrome to deoxidize and alloy the molten steel. The initial smelting molten steel passes through the ladle (LF) refining furnace to adjust the composition and raise the temperature, and leaves the station at 1587°C. The molten steel is then treated in a RH vacuum furnace for 37 minutes, and nitrogen is blown at the end of the treatment to increase the nitrogen to 0.0131% in the molten steel. The molten steel is poured into a continuous casting slab by a continuous casting machine. The chemical composition of the continuous casting slab is: C 0.491, Si 0.214, Mn0.885, P 0.011, S 0.0021, Cr 1.05, ...

Embodiment 2

[0054] Embodiment 2: produce in 210t-2250mm production line.

[0055] Put 197 tons of molten iron, 26 tons of scrap steel, 2.6 tons of ferromolybdenum alloy and 0.9 tons of ferronickel alloy into a 210-ton converter, smelt for 32 minutes and tap the steel. Ferro-silicon, ferro-manganese, ferro-aluminum, and high-carbon ferro-chrome deoxidize and alloy molten steel. The initial smelting molten steel passes through the ladle (LF) refining furnace to adjust the composition and raise the temperature, and leaves the station at 1569°C. The molten steel is then treated in a RH vacuum furnace for 32 minutes, and nitrogen is blown at the end of the treatment to increase the nitrogen to 0.0120% in the molten steel. The molten steel is poured into a continuous casting slab by a continuous casting machine. The chemical composition of the continuous casting slab is: C 0.502, Si 0.226, Mn0.868, P 0.010, S 0.0018, Cr 1.02, V 0.132, Ni 0.596, Mo 1.23, Al 0.092, N 0.0123, and the rest are Fe...

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PUM

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Abstract

The invention discloses D6A hot-rolled wide strip steel for a thermometal saw blade backing material and a production method thereof. The strip steel comprises, by mass percentage, 0.45-0.55% of C, 0.05-0.30% of Si, 0.6-1.0% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.9-1.20% of Cr, 0.08-0.15% of V, 0.50-0.70% of Ni, 0.90-1.20% of Mo, 0.05-0.15% of Al, 0.007-0.015% of N, and the balance Fe; and the specification of the hot-rolled wide strip steel is (3.0-8.0) * (960-1500) mm. The production method includes the steps of 210t converter smelting, refining in a ladle furnace and a vacuum furnace, slab continuous casting machine pouring and slab hot-charging and hot-feeding, wherein the charging temperature of a slab entering a heating furnace is greater than 400 DEG C, the heating temperature of the slab is greater than or equal to 1200 DEG C, and the hot rolling finishing temperature is 860-920 DEG C; the rolled strip steel adopts a laminar flow sparse cooling mode, and the coiling temperature is 650-720 DEG C; and a hot-rolled steel coil is put into a slow cooling pit or a slow cooling cover to be slowly cooled. The hot-rolled wide strip steel product produced by the method is wide in width specification range, high in size precision, small in performance difference and high in yield.

Description

technical field [0001] The invention relates to the technical field of alloy structural steel, in particular to a D6A hot-rolled wide strip steel for bimetallic saw blade back material and a production method thereof. Background technique [0002] Bi-metal saw blades are composited by back material and tooth material. They are mainly used for cutting metal, hard and precious wood and other materials. They are one of the most advanced cutting tools in the world today. The back material is generally made of Cr-Ni-Mo-V alloy structural steel. Typical steel grades include D6A, X32, RM80, etc., among which D6A is a more mature material used in the bimetallic saw blade industry. [0003] Because the alloy content of D6A steel is close to 5%, it is difficult to produce using the conventional converter-continuous casting-hot rolling metallurgical process. Generally, special steel enterprises use electric furnace-die casting-square ingot-hot rolling to produce, and the product types ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/46C22C38/44C22C38/06C22C33/06C21C7/10C21D8/02
CPCC21C7/10C21D8/0226C21D2211/002C21D2211/005C21D2211/009C22C33/06C22C38/001C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 曾斌王慎德李光辉肖尊湖周春泉刘旭辉周鉴徐刚军严立新汪净
Owner 湖南华菱涟源钢铁有限公司
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