A kind of preparation method of improved cold rolling roll
An improved technology for cold rolling rolls, which is applied in the field of preparation of improved cold rolling rolls, can solve the problems of lack of universal applicability, high manufacturing cost, etc., and achieve the effects of easy popularization and application, good wear resistance, and low energy consumption
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Embodiment 1
[0032] The composition of the improved cold rolling roll in this embodiment is preferably C 2.0%; Si 1.4%; Mn 0.4%; P 0.08%; S 0.05%; Cr 7.0%; Ni 0.15%; Mo 0.25%; Nb 0.16%; %; N 0.25%; Al 0.05%; Zr 0.1%; Cu 0.12%; Ti 0.15%, the balance being Fe and unavoidable impurities.
[0033] The preparation steps of the improved cold roll of the present embodiment are:
[0034] Step 1: Melting is carried out according to the above-mentioned chemical element composition ratio, and the roll cast slab is cast.
[0035] Step 2: Anneal the roll. The specific annealing process is as follows: heat the roll to 910°C for 3 hours, cool it in the furnace to 765°C, hold it for 5 hours, then cool it to below 550°C and take it out of the furnace for air cooling, and then rough process the roll. In this embodiment, firstly, the roll is annealed, and the heating temperature is controlled between 900°C and 920°C, the purpose of which is to improve the processing performance of the roll and increase the ...
Embodiment 2
[0042] The preparation method of an improved cold rolling roll in this embodiment is basically the same as in Example 1, except that the chemical element mass percentage composition of the cold rolling roll in this embodiment is as follows: C 1.8%; Si 1.8%; Mn 0.3 %; P 0.07%; S 0.04%; Cr 6.0%; Ni 0.2%; Mo 0.2%; Nb 0.22%; V 0.2%; N 0.20%; Al 0.01%; The balance is Fe and unavoidable impurities. Its preparation process is:
[0043] Step 1. Melting is carried out according to the distribution ratio of chemical elements, and a roll billet is cast;
[0044] Step 2, annealing the roll, the specific annealing process is: heating the roll to 900°C for 2 hours, furnace cooling to 750°C, holding for 6 hours, then furnace cooling to below 550°C and air cooling, and then rough machining the roll;
[0045] Step 3. Rapidly heat the roll to 950°C, and control the roll rotation in the cooling device. At the same time, apply a nano-ceramic coating on the surface of the roll neck. The thicknes...
Embodiment 3
[0049] The preparation method of an improved cold rolling roll in this embodiment is basically the same as in Example 1, except that the chemical element mass percentage composition of the cold rolling roll in this embodiment is as follows: C 2.3%; Si 0.8%; Mn 0.5 %; P 0.08%; S 0.05%; Cr 8.0%; Ni 0.1%; Mo 0.3%; Nb 0.08%; V 0.6%; N 0.15%; Al 0.05%; The balance is Fe and unavoidable impurities. Its preparation process is:
[0050] Step 1. Melting is carried out according to the distribution ratio of chemical elements, and a roll billet is cast;
[0051] Step 2: Carry out annealing treatment on the roll. The specific annealing treatment process is: heating the roll to 920°C for 4 hours, furnace cooling to 780°C, keeping it for 4 hours, then furnace cooling to below 550°C and air cooling, and then rough machining the roll;
[0052] Step 3. Rapidly heat the roll to 1020°C, and control the rotation of the roll in the cooling device. At the same time, coat the surface of the roll n...
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Abstract
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