CN103484791A

CN103484791A - Method for remanufacturing scrapped rollers to be qualified rollers

Info

Publication number: CN103484791A
Application number: CN201310428068.5A
Authority: CN
Inventors: 黄金荣; 范银芳
Original assignee: YINXIN ROLLER CO Ltd HUZHOU
Current assignee: YINXIN ROLLER CO Ltd HUZHOU
Priority date: 2013-09-22
Filing date: 2013-09-22
Publication date: 2014-01-01

Abstract

The invention relates to a method for remanufacturing crapped rollers to be qualified rollers. The method particularly comprises the followings: (1), carrying out annealing process; (2), machining the scrapped rollers to be roller blank after annealing; (3), carrying out quenching and tempering treatment; (4), carrying out final heat treatment. Compared with the prior art, the method provided by the invention has the positive effects as follows: the scrapped rollers are remanufactured to be the qualified rollers, the roller manufacturing period is shortened, the procurement cost of enterprises can be reduced, the resource consumption is lowered, the environment pollution is reduced, and the purpose of recycling economy is achieved.

Description

A kind ofly will scrap the method that roll is changed system into qualified roll

Technical field

The present invention relates to a kind ofly will scrap the method that roll is changed system into qualified roll.

Background technology

Be subject to the restriction of milling train model, roll dressing is to certain size or skidding appears in the operation of rolling, broken belt, steel bonding, local overload, cause the phenomenons such as barrel Spalling, must scrap in advance, just can not re-use, to roll, use producer to cause great financial loss, therefore how will scrap roll and make qualified roll into and just seem very necessary.

Summary of the invention

For problems of the prior art, the object of the present invention is to provide and a kind ofly will scrap the technical scheme that roll is changed system into the method for qualified roll.

Describedly a kind ofly will scrap the method that roll is changed system into qualified roll, it is characterized in that the component that this roll contains following weight percent: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0%, Cr 8.0-10.0%, Al 0.1-0.4%, Ni 2.2-2.6%, Co 6.5-7.5%, Nb 0.2-0.4%, Ti 0.2-0.4%, Ce 0.4-0.6%, Zr 0.05-0.20%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe; Concrete method for remanufacturing is: 1) adopt annealing process, specifically will scrap in the annealing furnace that roll is placed on 10 ℃, furnace temperature 600 soil, after being incubated 13 hours, stove is cold; 2) roll of scrapping after annealing is machined into to roller stock, the geometrical dimension of roller stock is to have more the surplus of 6 7mm on each geometrical dimension of target roll; 3) modifier treatment, put into by roller stock the car type furnace that furnace temperature is 400 ℃, and heat treatment furnace is heated to 890 ± 10 ℃ with the rate of heating of 50 ℃/h, is incubated 10 hours; Come out of the stove, water-cooled is to 200-250 ℃; Put in the heat treatment furnace of 400 ℃ of furnace temperature insulation 4 hours again, and then while being warming up to 600 ℃, be incubated 20 hours, last stove is cold; 4) final thermal treatment, at first be placed on the roller stock after modifier treatment preheating in the car type furnace of furnace temperature 350-400 ℃, and be 12 hours warm up time; Secondly proceed to double-frequency quenching machine tool after preheating and quench, quenching temperature is 940-960 ℃, double-frequency quenching machine tool translational speed 0.7mm/s, continuous cool time 50 minutes; Under being-70 ℃, the deepfreeze temperature carries out the deepfreeze of 6-7 hour twice; Finally carry out low-temperaturetempering, the car type furnace furnace temperature is that tempering temperature is 100-180 ℃, and insulation is tempering time 90-120 hour.

Describedly a kind ofly will scrap the method that roll is changed system into qualified roll, it is characterized in that the component that described roll contains following weight percent: C 3.3-3.5%, W 1.3-1.5%, Mo 5.5-6.5%, V 2.3-2.7%, Cr 8.5-9.5%, Al 0.15-0.35%, Ni 2.3-2.5%, Co 6.8-7.2%, Nb 0.25-0.35%, Ti 0.25-0.35%, Ce 0.45-0.55%, Zr 0.10-0.15%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

Describedly a kind ofly will scrap the method that roll is changed system into qualified roll, and it is characterized in that the component that described roll contains following weight percent: C 3.4%, W 1.4%, Mo 6.0%, and V 2.5%, and Cr 9.0%, Al 0.25%, and Ni 2.4%, and Co 7.0%, Nb 0.3%, and Ti 0.3%, and Ce 0.5%, Zr 0.12%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

Describedly a kind ofly will scrap the method that roll is changed system into qualified roll, and it is characterized in that describedly before modifier treatment, roller stock being carried out to UT (Ultrasonic Testing).

At this temperature, quenching stress can be partly eliminated in long-time tempering, particularly reduces the tensile stress of transition layer.Adjust hardness of roll body simultaneously and reach technical requirements, and make to organize the stable high surface compress residual stresses that keeps, become the target roll.

Compared with prior art, positively effect of the present invention is, it will be scrapped roll and change system into qualified roll, shorten manufacturing the cycle of roll, reduces the purchase cost of enterprise, and reaches the reduction resource consumption, and environmental contamination reduction, realize the purpose of recycling economy.

Embodiment

The present invention will scrap the method that roll is changed system into qualified roll, the component that wherein roll contains following weight percent: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0%, Cr 8.0-10.0%, Al 0.1-0.4%, Ni 2.2-2.6%, Co 6.5-7.5%, Nb 0.2-0.4%, Ti 0.2-0.4%, Ce 0.4-0.6%, Zr 0.05-0.20%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe; Concrete method for remanufacturing is: 1) adopt annealing process, specifically will scrap in the annealing furnace that roll is placed on 10 ℃, furnace temperature 600 soil, after being incubated 13 hours, stove is cold; 2) roll of scrapping after annealing is machined into to roller stock, the geometrical dimension of roller stock is to have more the surplus of 6 7mm on each geometrical dimension of target roll; 3) modifier treatment was carried out UT (Ultrasonic Testing) to roller stock before modifier treatment, and roller stock is put into to the car type furnace that furnace temperature is 400 ℃, and heat treatment furnace is heated to 890 ± 10 ℃ with the rate of heating of 50 ℃/h, is incubated 10 hours; Come out of the stove, water-cooled is to 200-250 ℃; Put in the heat treatment furnace of 400 ℃ of furnace temperature insulation 4 hours again, and then while being warming up to 600 ℃, be incubated 20 hours, last stove is cold; 4) final thermal treatment, at first be placed on the roller stock after modifier treatment preheating in the car type furnace of furnace temperature 350-400 ℃, and be 12 hours warm up time; Secondly proceed to double-frequency quenching machine tool after preheating and quench, quenching temperature is 940-960 ℃, double-frequency quenching machine tool translational speed 0.7mm/s, continuous cool time 50 minutes; Under being-70 ℃, the deepfreeze temperature carries out the deepfreeze of 6-7 hour twice; Finally carry out low-temperaturetempering, the car type furnace furnace temperature is that tempering temperature is 100-180 ℃, and insulation is tempering time 90-120 hour.

As preferably, the component that roll contains following weight percent: C 3.3-3.5%, W 1.3-1.5%, Mo 5.5-6.5%, V 2.3-2.7%, Cr 8.5-9.5%, Al 0.15-0.35%, Ni 2.3-2.5%, Co 6.8-7.2%, Nb 0.25-0.35%, Ti 0.25-0.35%, Ce 0.45-0.55%, Zr 0.10-0.15%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

As preferably, the component that roll contains following weight percent: C 3.4%, W 1.4%, and Mo 6.0%, and V 2.5%, and Cr 9.0%, Al 0.25%, and Ni 2.4%, and Co 7.0%, and Nb 0.3%, and Ti 0.3%, and Ce 0.5%, Zr 0.12%, Si<0.8%, and Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

Claims

1. will scrap the method that roll is changed system into qualified roll for one kind, it is characterized in that the component that this roll contains following weight percent: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0%, Cr 8.0-10.0%, Al 0.1-0.4%, Ni 2.2-2.6%, Co 6.5-7.5%, Nb 0.2-0.4%, Ti 0.2-0.4%, Ce 0.4-0.6%, Zr 0.05-0.20%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe; Concrete method for remanufacturing is: 1) adopt annealing process, specifically will scrap in the annealing furnace that roll is placed on 10 ℃, furnace temperature 600 soil, after being incubated 13 hours, stove is cold; 2) roll of scrapping after annealing is machined into to roller stock, the geometrical dimension of roller stock is to have more the surplus of 6 7mm on each geometrical dimension of target roll; 3) modifier treatment, put into by roller stock the car type furnace that furnace temperature is 400 ℃, and heat treatment furnace is heated to 890 ± 10 ℃ with the rate of heating of 50 ℃/h, is incubated 10 hours; Come out of the stove, water-cooled is to 200-250 ℃; Put in the heat treatment furnace of 400 ℃ of furnace temperature insulation 4 hours again, and then while being warming up to 600 ℃, be incubated 20 hours, last stove is cold; 4) final thermal treatment, at first be placed on the roller stock after modifier treatment preheating in the car type furnace of furnace temperature 350-400 ℃, and be 12 hours warm up time; Secondly proceed to double-frequency quenching machine tool after preheating and quench, quenching temperature is 940-960 ℃, double-frequency quenching machine tool translational speed 0.7mm/s, continuous cool time 50 minutes; Under being-70 ℃, the deepfreeze temperature carries out the deepfreeze of 6-7 hour twice; Finally carry out low-temperaturetempering, the car type furnace furnace temperature is that tempering temperature is 100-180 ℃, and insulation is tempering time 90-120 hour.

2. according to claim 1ly a kind ofly will scrap the method that roll is changed system into qualified roll, it is characterized in that the component that described roll contains following weight percent: C 3.3-3.5%, W 1.3-1.5%, Mo 5.5-6.5%, V 2.3-2.7%, Cr 8.5-9.5%, Al 0.15-0.35%, Ni 2.3-2.5%, Co 6.8-7.2%, Nb 0.25-0.35%, Ti 0.25-0.35%, Ce 0.45-0.55%, Zr 0.10-0.15%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

3. according to claim 1ly a kind ofly will scrap the method that roll is changed system into qualified roll, and it is characterized in that the component that described roll contains following weight percent: C 3.4%, W 1.4%, Mo 6.0%, and V 2.5%, and Cr 9.0%, Al 0.25%, and Ni 2.4%, and Co 7.0%, Nb 0.3%, and Ti 0.3%, and Ce 0.5%, Zr 0.12%, Si<0.8%, Mn<1.5%, S<0.03%, P<0.04, surplus is Fe.

4. according to claim 1ly a kind ofly will scrap the method that roll is changed system into qualified roll, and it is characterized in that describedly before modifier treatment, roller stock being carried out to UT (Ultrasonic Testing).