Rolling method based on heated pure nickel plate

A technology of pure nickel after heating, which is applied in the direction of metal rolling, metal rolling, workpiece heating devices, etc. Precise control and high flatness effect

Active Publication Date: 2021-06-01
山东盛阳金属科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method has the following deficiencies: 1) If the ambient temperature of the nickel plate is low, the nickel plate is directly hot-rolled and billeted. Because the temperature of the nickel plate rises sharply, it is very easy to change the crystals inside the nickel plate, which eventually leads to nickel plate

Method used

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  • Rolling method based on heated pure nickel plate

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Experimental program
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Effect test

Embodiment 1

[0030] The size of the slab is 152*1388*5089mm, the grade is N5, and the target size is 3*1388mm. The heating and rolling methods are as follows:

[0031] Step 1. Preheat the slab. The heating temperature is 160°C / min to heat the slab. The preheating temperature reaches 300°C and lasts for 10 minutes. The oxygen content in the heating furnace is 9.5%;

[0032] Step 2. After the preheating is completed, the slab is heated for 35 minutes in one stage, the heating temperature is 950°C, the temperature of the upper burner in the heating furnace is 1000°C, the lower burner is 950°C, and the oxygen content in the furnace is 4.05%;

[0033] Step 3, second-stage heating of the slab: temperature 1050°C, time 45min, heating temperature of the upper burner in the heating furnace in the second-stage heating 1070°C, heating temperature of the lower burner 1050°C, oxygen content in the heating furnace 10%;

[0034] Step 4, slab soaking section: temperature 1080°C, heating time 55min, heatin...

Embodiment 2

[0042] The size of the slab is 154*1378*5080mm, the grade is N5, and the target size is 4*1388mm. The heating and rolling methods are as follows:

[0043] Step 1. Preheat the slab. The heating temperature is 200°C / min to heat the slab. The preheating temperature reaches 350°C and lasts for 12 minutes. The oxygen content in the heating furnace is 10%;

[0044] Step 2. After the preheating is completed, the slab is heated for 40 minutes in the first stage, the heating temperature is 1000 ° C, the temperature of the upper burner in the heating furnace is 1010 ° C, the lower burner is 970 ° C, and the oxygen content in the heating furnace is 4.5%.

[0045] Step 3, second-stage heating of the slab: temperature 1060°C, time 55min, heating temperature of the upper burner in the heating furnace in the second-stage heating 1070°C, heating temperature of the lower burner 1060°C, oxygen content in the heating furnace 10.89%;

[0046] Step 4, slab soaking section: temperature 1100°C, heat...

Embodiment 3

[0054] The size of the slab is 118*1388*5865mm, the grade is N5, and the target size is 5*1388mm. The heating and rolling methods are as follows:

[0055] Step 1. Preheat the slab. The heating temperature is 220°C / min to heat the slab. The preheating temperature reaches 380°C and lasts for 15 minutes. The oxygen content in the heating furnace is 11%;

[0056] Step 2. After the preheating is completed, the slab is heated in the first stage for 45 minutes. The heating temperature is 980°C. During the first stage heating, the temperature of the upper burner in the heating furnace is 1000°C, the lower burner is 980°C, and the oxygen content in the heating furnace is 4.45%.

[0057] Step 3, second-stage heating of the slab: temperature 1070°C, time 55min, heating temperature of the upper burner in the heating furnace in the second-stage heating 1072°C, heating temperature of the lower burner 1060°C, oxygen content in the heating furnace 10.58%;

[0058] Step 4, slab soaking section...

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Abstract

The invention discloses a rolling method based on a heated pure nickel plate. The rolling method comprises a plate blank preheating stage, a plate blank first-section heating stage, a plate blank second-section heating stage, a plate blank soaking stage, plate blank rough rolling, oxide skin treatment before finish rolling, plate finish rolling, curling and acid pickling annealing. According to the method, the plate blank is heated at a temperature of 150-220 DEG C/min, so that the situation that the nickel plate blank is rapidly heated from the room temperature, internal crystals are changed, and a yield is reduced is avoided; and meanwhile, in a heating process of the first-stage heating, the second-stage heating and the soaking stage, temperature control can be more accurate through control over the temperature of an upper burner and the temperature of a lower burner in a heating process; a high-pressure water descaling system is used for cleaning oxide skin on the surface of a plate blank before finish rolling, the oxide skin is prevented from being pressed into the surface of follow-up strip steel; and meanwhile, the nickel plate is rolled through seven-pass downward pressing and eight finish rolling mills in the rough rolling process, so that the surface of the rolled nickel plate is free of roller marks, high in flatness and good in surface glossiness.

Description

technical field [0001] The invention belongs to the technical field of hot rolling, in particular to a rolling method based on heating of a pure nickel plate. Background technique [0002] Because of its excellent corrosion resistance and high strength, pure nickel is widely used in aerospace, chemical industry, electric power, medical and other fields. The production methods of nickel mainly include electrolysis, carbonylation and hydrogen reduction; [0003] After searching the patent application publication number CN109351771A, a high-purity nickel plate rolling method comprises the following steps: step 1: hot rolling billet opening, step 2: finished product stable rolling, step 3: cutting the edge of the finished warm rolled nickel plate described in step 2 Plate machine trimmed; [0004] The method has the following deficiencies: 1) If the ambient temperature of the nickel plate is low, the nickel plate is directly hot-rolled and billeted. Because the temperature of t...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B1/32B21B45/00B21B45/08B21B45/02B21B37/74C22F1/10C23G1/10
CPCB21B1/22B21B1/32B21B45/004B21B45/08B21B45/0269B21B37/74C22F1/10C23G1/10Y02P70/10
Inventor 赵伟倪新春周嘉晟肖亮明蔡德智刘龙祥冯旺爵张廷
Owner 山东盛阳金属科技股份有限公司
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