A kind of rolling method after heating based on pure nickel plate

Abstract

The invention discloses a rolling method based on pure nickel plate heating, which comprises a slab preheating section, a slab heating stage, a slab secondary heating section, a slab soaking section, slab rough rolling, and oxidation before finish rolling Skin treatment, plate finish rolling, curling, pickling and annealing; the invention heats up the slab at 150-220°C / min to prevent the rapid heating of the nickel plate slab from room temperature, causing changes in the internal crystals and resulting in a decrease in yield When the situation occurs, at the same time, during the heating process of the first stage heating, the second stage heating, and the soaking stage, the temperature control of the upper and lower burners can be controlled to make the temperature control more accurate. Clean the scale to prevent the scale from being pressed into the surface of the subsequent strip steel. At the same time, the nickel plate is rolled through 7 passes of down-pressing and 8 finishing mills during the rough rolling process to ensure that there is no roll on the surface of the rolled nickel plate. Printing, high flatness and good surface gloss.

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...

Examples

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...

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...

Examples

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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