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Heating and rolling method for wide thick titanium-steel composite plate

A technology for clad plates and clad slabs, applied in metal rolling, metal rolling, workpiece heating devices, etc. Problems such as processing and use, to achieve the effect of eliminating surface tearing defects, good rolled plate shape, and eliminating head tearing

Inactive Publication Date: 2019-02-19
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the uneven heating of the existing titanium steel clad plate heating process, the buckle or upturning of the titanium steel clad plate often occurs during the rolling process, which will cause damage to the titanium steel clad plate and the roll in severe cases. As a result, it cannot be processed and used normally; at the same time, the existing heating process of titanium steel composite panels is accompanied by head tearing and edge folding, which seriously affects the yield and production efficiency of titanium steel composite panels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: The heating and rolling method of the wide-thick titanium steel clad plate adopts the following specific process.

[0016] Select a titanium-steel composite slab with a length of 3200mm, a thickness of 68mm, and a width of 1800mm, and load it into a continuous heating furnace, with its edge 2.5 meters away from the furnace door. The furnace pressure of the heating furnace is a slight positive pressure of 5Pa, and the oxygen content is 2%. It is heated; firstly, the temperature in the preheating section is 650°C for 1 hour; Hours; Finally, the temperature in the soaking section is 900°C and the holding time is 4 hours. During rolling, 10MPa high-pressure water is used to remove phosphorus in the first pass; the reductions in the first three passes are 15mm, 16mm, and 18mm respectively, and the final rolling temperature is 760°C. After rolling, hot straightening is carried out twice, and then air cooling is performed to obtain the titanium-steel composite p...

Embodiment 2

[0018] Embodiment 2: The heating and rolling method of the wide-thick titanium steel clad plate adopts the following specific process.

[0019] Select a titanium-steel composite slab with a length of 3300mm, a thickness of 78mm, and a width of 1900mm, and load it into a continuous heating furnace, with its edge 2.5 meters away from the furnace door. The furnace pressure of the heating furnace is slightly positive pressure 7Pa, the oxygen content is 3%, and the heating is carried out; firstly, the temperature in the preheating section is 660°C for 1.2 hours; Hours; Finally, the temperature in the soaking section is 910°C and the holding time is 4.2 hours. During rolling, 11MPa high-pressure water is used to remove phosphorus in the first pass; the reductions in the first three passes are 16mm, 17mm, and 19mm respectively, and the final rolling temperature is 765°C. After rolling, hot straightening is carried out for 3 times, and then air-cooled to obtain the titanium-steel com...

Embodiment 3

[0021] Embodiment 3: The heating and rolling method of the wide-thick titanium steel clad plate adopts the following specific process.

[0022] Select a titanium-steel composite slab with a length of 3350mm, a thickness of 88mm, and a width of 1950mm, and load it into a continuous heating furnace, with its edge 2.3 meters away from the furnace door. The furnace pressure of the heating furnace is slightly positive pressure 8Pa, the oxygen content is 4%, and the heating is carried out; firstly, the temperature in the preheating section is 680°C for 1.4 hours; Hours; Finally, the temperature in the soaking section is 920°C and the holding time is 4.6 hours. During rolling, 12MPa high-pressure water is used to remove phosphorus; the reductions in the first three passes are 17mm, 18mm, and 19mm respectively, and the final rolling temperature is 750°C. After rolling, hot straightening is carried out 4 times, and then air-cooled to obtain the titanium-steel composite plate.

[0023...

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Abstract

The invention discloses a heating and rolling method for a wide thick titanium-steel composite plate. The heating and rolling method comprises the heating step and the rolling step. In the heating step, a titanium-steel composite plate blank is heated under the atmosphere of micro positive pressure and weak oxidability; heat preservation is conducted for 1.0-1.5 h at the temperature of 650 DEG C-700 DEG C in the preheating section; then, the temperature is rapidly increased to 880 DEG C-900 DEG C with 1.0-2.0 h in the heating section, and heat preservation is conducted for 1.0-2.0 h; and finally, heat preservation is conducted for 4.0-5.0 h at the temperature of 900 DEG C-930 DEG C in the soaking section. According to the method, in the heating step, heating of the titanium-steel compositeplate is uniform, the phenomena of head tearing, head buckling, upwarping and edge part folding in the titanium-steel composite plate rolling process are eliminated, the rolled plate shape is good, the surface is clean and tidy, edge part folding and foreign matter pressing-in are avoided, the performance is excellent, and the yield and the production efficiency are improved. The titanium-steel composite plate rolled through the method is free of the tearing phenomenon, the performance meets the GB / T8547 requirement, the surface is clean and tidy, edge part folding and foreign matter pressing-in are avoided, and the plate shape is good.

Description

technical field [0001] The invention relates to a method belonging to the technical field of metal material processing, in particular to a heating and rolling method for a wide-thick titanium-steel composite plate. Background technique [0002] The titanium-steel composite plate combines the advantages of its metal components to obtain physical, chemical and mechanical properties that a single metal does not have. It meets the performance requirements of high strength, high specific strength, fatigue resistance, corrosion resistance, wear resistance, etc., and at the same time greatly saves rare and precious materials and reduces production costs. It has been widely used in chemical industry, electric power, machinery, shipping, aviation and other fields. Therefore, the research and development of titanium-steel clad plate processing technology is very important; and the heating process of titanium-steel clad plate is the premise of its thermal processing. [0003] However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B45/00B21B45/08B21C37/02
CPCB21B1/38B21B45/004B21B45/08B21B2001/386B21B2201/06B21C37/02
Inventor 邓建军李杰龙杰王青王会岭付振坡付东阳刘丹王少义高全信
Owner WUYANG IRON & STEEL
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