CN104032117B - A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll - Google Patents
A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll Download PDFInfo
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Abstract
The invention discloses the heat treatment method of a kind of ultrahigh hardness non-ferrous metal cold roll, this heat treatment method step is as follows: a, is first put into by roll in preheating furnace and to preheat at a temperature of 220～250 DEG C；B, then roll are installed on quenching machine to carry out the body of roll rotating jet hardening, and the running parameter of quenching machine is: hardening heat 900～950 DEG C, quenching coolant-temperature gage 15～25 DEG C, quenching hydraulic pressure 0.15～0.30MPa；The ultralow temperature subzero treatment of 120～180 DEG C is carried out after c, quenching；Roll hanging in after d, subzero treatment heating furnace and carries out 100～120 DEG C of tempering, tempering time is not less than 72h；E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.The roller surface hardness that the present invention prepares reaches 102 105HSD, uniformity of hardness≤1HSD and depth of hardening zone and reaches more than 20mm.
Description
Technical field
The present invention relates to the thermal treatment process technology of a kind of ultrahigh hardness cold roll, especially for the cold roll of aluminum foil rolling industry, a kind of case hardness is made to reach the heat treatment method that 102-105HSD, uniformity of hardness≤1HSD and depth of hardening zone reach the ultrahigh hardness non-ferrous metal cold roll containing 3%Cr material of more than 20mm.
Background technology
Aluminium foil, because of its excellent characteristic, is widely used in food and drink, auto industry, medicine, electronics industry and article of everyday use etc..Along with growth in the living standard, the demand of aluminium foil will constantly be increased, demonstrate the application prospect that it is wide by people, and foil industry also can face the developing period of a high speed.The rolling aluminium foil requirement high (particularly case hardness, uniformity of hardness) to the performance of roll itself.Aluminum foil roll major part uses 3%Cr or 5%Cr material at present, and the effective depth of hardening of the 3%Cr of domestic production is typically at about 15mm, and case hardness can only achieve 98-102HSD and uniformity of hardness typically at about 2HSD.Effective depth of hardening requires that the roll of more than 20mm is necessary for selecting price higher 5%Cr material manufacture.The most domestic this type of used roll major part dependence on import.
Summary of the invention
It is an object of the invention to at present existing 3%Cr roller depth of hardening zone problem, it is provided that a kind of make case hardness reach the heat treatment method that 102-105HSD, uniformity of hardness≤1HSD and depth of hardening zone reach the ultrahigh hardness non-ferrous metal cold roll containing 3%Cr material of more than 20mm.
It is an object of the invention to solve by the following technical programs:
A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll, it is characterized in that: the composition of this cold roll and percentage by weight thereof be: the Cr of 2.80-3.20%, the Mn of the Si of the C of 0.90-1.0%, 0.30-0.50%, 0.20-0.50%, the Ni of 0.10-0.30%, the V of the Mo of 0.20-0.40%, 0.10-0.20%, S, P of≤0.015%, remaining composition is Fe, and the percentage by weight sum of each composition is 100%；The heat treatment method step of this cold roll is as follows:
A, first roll is put in preheating furnace, preheat at a temperature of 220～250 DEG C；
B, preheated roll is installed on quenching machine carrying out the body of roll rotating jet hardening, the running parameter of quenching machine is: hardening heat is 900～950 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.15～0.30MPa；
C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-120～-180 DEG C；
D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 100～120 DEG C of tempering, tempering time is not less than 72h；
E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.
Roll in described step a is no less than 12h preheating time.
Roll in described step b is when jet hardening, and roller rotational speed is 30～35r/min, and roll translational speed is 30～42mm/min.
Roll in described step b cools down after quenching terminates, and cool-storage time is 45～80min.
The ultralow temperature subzero treatment time in described step c is no less than 2h.
Roll to carry out roughing and modifier treatment to blank before the heat treatment so that quenching and tempering hardness reaches 40-50HSD, then the roll after quenched carries out semifinishing and makes barrel diameter be ground to the size set.
The present invention has the following advantages compared to existing technology:
The present invention makes the hardened layer of roller degree of depth containing 3%Cr material reach more than 20mm after being processed by preheating, quenching, ultralow temperature subzero treatment, lonneal, close to the hardened layer of roller degree of depth containing 5%Cr material；The most abundant at the austenitizing of higher hardening heat bottom roll material so that the uniformity of hardness of roll can reach≤1HSD.
The Technology for Heating Processing of the present invention improves matrix solid solution carbon amounts by high-temperature heating, add the remained austenite content after quenching, again through-120～the ultralow temperature subzero treatment of-180 DEG C, improve the content of martensite in material microstructure, so that the roll hardness containing 3%Cr material improves to more than 102HSD.
After the roll of the present invention is processed by preheating, quenching, ultralow temperature subzero treatment, lonneal so that the roller performance containing 3%Cr material has reached the roller performance containing 5%Cr material, reduces use cost.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated.
A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll, the composition of this cold roll and percentage by weight thereof be: the Cr of 2.80-3.20%, the Mn of the Si of the C of 0.90-1.0%, 0.30-0.50%, 0.20-0.50%, the Ni of 0.10-0.30%, the V of the Mo of 0.20-0.40%, 0.10-0.20%, S, P of≤0.015%, remaining composition is Fe, and the percentage by weight sum of each composition is 100%；The heat treatment method step of this cold roll is as follows: a, first put in preheating furnace by roll, preheats at a temperature of 220～250 DEG C, and preheating time is no less than 12h；B, preheated roll is installed on quenching machine the body of roll is carried out rotate jet hardening, the running parameter of quenching machine is: hardening heat is 900～950 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.15～0.30MPa, roller rotational speed is 30～35r/min and roll translational speed is 30～42mm/min, and roll needs to carry out to cool down after quenching terminates and cool-storage time is 45～80min；C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-120～-180 DEG C, and the ultralow temperature subzero treatment time is no less than 2h；D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 100～120 DEG C of tempering, tempering time is not less than 72h；E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.Additionally roll to carry out roughing and modifier treatment to blank before carrying out this Technology for Heating Processing so that quenching and tempering hardness reaches 40-50HSD, then the roll after quenched carries out semifinishing and makes barrel diameter just can carry out heat treatment after being ground to the size set.
Embodiment one
Roller blank of the present invention is produced according to the chemical composition of designed roll, ultrasound examination blank complies with associated specifications, blank is carried out roughing and modifier treatment, make quenching and tempering hardness reach 40-50HSD, then the roll after quenched is carried out semifinishing and makes barrel diameter just can carry out heat treatment after being ground to the size set.The process of heat treatment is as follows: a, first put in preheating furnace by roll, preheats at a temperature of 250 DEG C, and preheating time is no less than 12h；B, preheated roll is installed on quenching machine the body of roll is carried out rotate jet hardening, the running parameter of quenching machine is: hardening heat is 900 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.25MPa, roller rotational speed is 35r/min and roll translational speed is 36mm/min, and roll needs to carry out to cool down after quenching terminates and cool-storage time is 60min；C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-160 DEG C, and the ultralow temperature subzero treatment time is no less than 2h；D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 110 DEG C of tempering, tempering time is not less than 72h；E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.
Embodiment two
Roller blank of the present invention is produced according to the chemical composition of designed roll, ultrasound examination blank complies with associated specifications, blank is carried out roughing and modifier treatment, make quenching and tempering hardness reach 40-50HSD, then the roll after quenched is carried out semifinishing and makes barrel diameter just can carry out heat treatment after being ground to the size set.The process of heat treatment is as follows: a, first put in preheating furnace by roll, preheats at a temperature of 230 DEG C, and preheating time is no less than 12h；B, preheated roll is installed on quenching machine the body of roll is carried out rotate jet hardening, the running parameter of quenching machine is: hardening heat is 950 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.15MPa, roller rotational speed is 30r/min and roll translational speed is 42mm/min, and roll needs to carry out to cool down after quenching terminates and cool-storage time is 80min；C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-140 DEG C, and the ultralow temperature subzero treatment time is no less than 2h；D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 100 DEG C of tempering, tempering time is not less than 72h；E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.
Embodiment three
Roller blank of the present invention is produced according to the chemical composition of designed roll, ultrasound examination blank complies with associated specifications, blank is carried out roughing and modifier treatment, make quenching and tempering hardness reach 40-50HSD, then the roll after quenched is carried out semifinishing and makes barrel diameter just can carry out heat treatment after being ground to the size set.The process of heat treatment is as follows: a, first put in preheating furnace by roll, preheats at a temperature of 220 DEG C, and preheating time is no less than 12h；B, preheated roll is installed on quenching machine the body of roll is carried out rotate jet hardening, the running parameter of quenching machine is: hardening heat is 930 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.30MPa, roller rotational speed is 33r/min and roll translational speed is 30mm/min, and roll needs to carry out to cool down after quenching terminates and cool-storage time is 45min；C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-180 DEG C, and the ultralow temperature subzero treatment time is no less than 2h；D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 120 DEG C of tempering, tempering time is not less than 72h；E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made.
The ultrahigh hardness non-ferrous metal cold roll obtained after above-described embodiment heat treatment after testing after can obtain, the case hardness of roll reaches 102-105HSD, uniformity of hardness≤1HSD and depth of hardening zone and reaches more than 20mm.
The present invention makes the hardened layer of roller degree of depth containing 3%Cr material reach more than 20mm after being processed by preheating, quenching, ultralow temperature subzero treatment, lonneal, close to the hardened layer of roller degree of depth containing 5%Cr material；The most abundant at the austenitizing of higher hardening heat bottom roll material so that the uniformity of hardness of roll can reach≤1HSD；Technology for Heating Processing improves matrix solid solution carbon amounts by high-temperature heating, add the remained austenite content after quenching, again through-120～the ultralow temperature subzero treatment of-180 DEG C, improve the content of martensite in material microstructure, so that the roll hardness containing 3%Cr material improves to more than 102HSD；Roll containing 3%Cr material is by after above-mentioned heat treatment so that it is performance has reached the roller performance containing 5%Cr material, reduces use cost.
Above example is only the technological thought that the present invention is described, it is impossible to limiting protection scope of the present invention with this, every technological thought proposed according to the present invention, any change done on the basis of technical scheme, within each falling within scope；The technology that the present invention is not directed to all can be realized by prior art.
Claims (4)
1. the heat treatment method of a ultrahigh hardness non-ferrous metal cold roll, it is characterized in that: the composition of this cold roll and percentage by weight thereof be: the Cr of 2.80-3.20%, the Mn of the Si of the C of 0.90-1.0%, 0.30-0.50%, 0.20-0.50%, the Ni of 0.10-0.30%, the V of the Mo of 0.20-0.40%, 0.10-0.20%, S, P of≤0.015%, remaining composition is Fe, and the percentage by weight sum of each composition is 100%；The heat treatment method step of this cold roll is as follows:
A, first roll is put in preheating furnace, preheat at a temperature of 220～250 DEG C；
B, preheated roll is installed on quenching machine carrying out the body of roll rotating jet hardening, the running parameter of quenching machine is: hardening heat is 900～950 DEG C, quenching coolant-temperature gage is 15～25 DEG C, quenching hydraulic pressure is 0.15～0.30MPa；
C, quenched after hang in cold treatment equipment and carry out the ultralow temperature subzero treatment of-120～-180 DEG C；
D, subzero treatment complete after until roller temperature go up to room temperature time, roll is hung in heating furnace and carries out 100～120 DEG C of tempering, tempering time is not less than 72h；
E, to tempering after roll carry out body surface hardness determination qualified after, the required ultrahigh hardness non-ferrous metal cold roll i.e. made；
Roll in described step b is when jet hardening, and roller rotational speed is 30～35r/min, and roll translational speed is 30～42mm/min；
Roll to carry out roughing and modifier treatment to blank before the heat treatment so that quenching and tempering hardness reaches 40-50HSD, then the roll after quenched carries out semifinishing and makes barrel diameter be ground to the size set.
The heat treatment method of ultrahigh hardness non-ferrous metal cold roll the most according to claim 1, it is characterised in that: the roll in described step a is no less than 12h preheating time.
The heat treatment method of ultrahigh hardness non-ferrous metal cold roll the most according to claim 1, it is characterised in that: the roll in described step b cools down after quenching terminates, and cool-storage time is 45～80min.
The heat treatment method of ultrahigh hardness non-ferrous metal cold roll the most according to claim 1, it is characterised in that: the ultralow temperature subzero treatment time in described step c is no less than 2h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104561505A (en) * | 2014-12-30 | 2015-04-29 | 中钢集团邢台机械轧辊有限公司 | Large-size roller sheath surface induction quenching method |
| CN105063285B (en) * | 2015-07-25 | 2017-09-01 | 宜兴市永昌轧辊有限公司 | A kind of roll induction hardening process method |
| CN105483354B (en) * | 2015-12-23 | 2017-09-29 | 中钢集团邢台机械轧辊有限公司 | The heat treatment method of large high-speed steel cold roll |
| CN106011665B (en) * | 2016-05-23 | 2017-11-24 | 一重集团常州华冶轧辊股份有限公司 | A kind of large-scale aluminium hot-rolling mill precision rolling working roll and its induction hardening method |
| CN108034899B (en) * | 2017-12-12 | 2021-05-14 | 中钢集团邢台机械轧辊有限公司 | High-speed broad width aluminium foil working roll |
| CN109762968A (en) * | 2019-03-26 | 2019-05-17 | 江苏润孚机械轧辊制造有限公司 | A kind of method of common forged steel roller stock production silicon steel cold roll |
| CN110230005B (en) * | 2019-05-22 | 2021-05-04 | 山东钢铁股份有限公司 | Steel for high-carbon chromium cold roll blank and preparation method thereof |
| CN110684890B (en) * | 2019-10-31 | 2021-08-03 | 宝钢轧辊科技有限责任公司 | Cryogenic treatment method for forged steel cold roll and novel nozzle adopted by cryogenic treatment method |
| CN111438187B (en) * | 2020-04-03 | 2022-03-22 | 江苏大亚铝业有限公司 | Production process for preparing aluminum foil for lithium battery by high-hardness roller |
| CN112981084B (en) * | 2021-02-20 | 2024-05-14 | 无锡亿宝机械设备有限公司 | Heat treatment method of fully hardened working roller |
| CN113832328A (en) * | 2021-09-14 | 2021-12-24 | 江苏润孚机械轧辊制造有限公司 | Roller manufacturing method of lithium battery pole piece rolling mill |
| CN114369702A (en) * | 2021-12-21 | 2022-04-19 | 中钢集团邢台机械轧辊有限公司 | Quenching method of Cr12 roller |
| CN115058651B (en) * | 2022-06-23 | 2024-02-27 | 宝钢轧辊科技有限责任公司 | Forged steel cold rolling working roll with roll mark resistance and manufacturing method thereof |
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| CN100376695C (en) * | 2005-03-29 | 2008-03-26 | 宝钢集团常州轧辊制造公司 | Method for making quench hardening layer of cold roll barrel |
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