CN109365723A - A kind of forging technology of roller press squeeze roll - Google Patents
A kind of forging technology of roller press squeeze roll Download PDFInfo
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- CN109365723A CN109365723A CN201811169273.3A CN201811169273A CN109365723A CN 109365723 A CN109365723 A CN 109365723A CN 201811169273 A CN201811169273 A CN 201811169273A CN 109365723 A CN109365723 A CN 109365723A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/02—Making machine elements balls, rolls, or rollers, e.g. for bearings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of forging technologies of roller press squeeze roll, it is characterized in that forging technology includes chemical component weight percentage in casting embryo material steel ingot steel ingot are as follows: 0.35%≤C≤0.45%, 1.5%≤Si≤2.5%, 20%≤Al≤23%, 0.022%≤Mg≤0.032%, 0.2%≤Mn≤0.38%, 0.005%≤Cr≤0.01%, 0.5%≤W≤1.5%, 0.0055%≤Nb≤0.0065%, 0.5%≤V≤1.5%, 1.0%≤Cu≤1.5%, 0.15%≤Ti≤0.25%, 0.25≤B≤0.35%, 0.8%≤Fe≤1%, 0.5%≤Mo≤0.9%, S≤0.1%, surplus be Zn and Then inevitable impurity carries out reheating jumping-up, then carry out control cooling, cooling velocity is 50 DEG C/h, then carries out heat treatment after forging.
Description
Technical field
The invention belongs to technical field of forging more particularly to a kind of forging technologies of roller press squeeze roll.
Background technique
Pressure roller is the critical component of roll squeezer, and pressure roller is divided into solid forging and two kinds of separate structure.Split type structure due to
Easily occurs the problems such as roller set is loosened with the lateral shift of roller core, interference in process of production, using effect is bad, and uses whole
The roll squeezer that body forges pressure roller is with the obvious advantage, still, since pressure roller diameter of part is big, length is short, solid forging pressure roller limitation
It is very big, it is unfavorable for the control to steel inclusion form, part easily forms the small sky around sheet field trash and field trash
Easily there is ultrasonic examination over-standard phenomenon after cold working in hole, crackle.
Summary of the invention
It is an object of the present invention to solution above-mentioned technical problems, provide a kind of forging technology of roller press squeeze roll, the work
Skill improves forging inherent quality by improving ingot composition and forging technology, eliminates cracking caused by field trash, and refine
Forging interior tissue, improves impact flexibility, the thermal fatigue resistance of material, and improve the service life of forging.
Its technical solution is as follows: a kind of forging technology of roller press squeeze roll, it is characterised in that: walks including following technique
It is rapid:
A, it casts embryo material steel ingot, chemical component weight percentage in steel ingot are as follows: 0.35%≤C≤0.45%, 1.5%≤Si≤
2.5%, 20%≤Al≤23%, 0.022%≤Mg≤0.032%, 0.2%≤Mn≤0.38%, 0.005%≤Cr≤
0.01%, 0.5%≤W≤1.5%, 0.0055%≤Nb≤0.0065%, 0.5%≤V≤1.5%, 1.0%≤Cu≤
1.5%, 0.15%≤Ti≤0.25%, 0.25≤B≤0.35%, 0.8%≤Fe≤1%, 0.5%≤Mo≤0.9%, S≤
0.1%, surplus is Zn and inevitable impurity, and the steel ingot temperature of cast molding is down to 300 DEG C, is again heated to 650~750
DEG C, 3~5 hours are kept the temperature, is furnace-cooled to 350 DEG C, keeps the temperature 3 hours, is again heated to 550~600 DEG C, 6~8 hours are kept the temperature, with 20
DEG C/h it is cooled to 350 DEG C, it is air-cooled later;
B, the Heating Steel Ingots for completing step a carry out first time jumping-up, the pulling of WHF method, the height after pulling to 1235~1255 DEG C
Diameter is than control 2.0~2.2, and total forging ratio is 2.0~2.2;Width ratio B/ is expected in anvil width ratio W/H=0.6~0.8 when WHF method pulls out
H=0.80~1.0, arrange 10 times pullings, and the control of reduction ratio that head pulls out twice is 10~15%, subsequent 8 times pullings reduction ratio
By 15~20% controls;It is round as a ball that chamfered edge is carried out again, and chamfered edge deformation is depressed using unilateral gradation, and a reduction ratio is less than 8%;
C, 880 DEG C are heated to the step b steel ingot completed for the second time, carries out second of jumping-up, wide flat anvil limit pulling, forging
Than being 1.5~2.0,8 times pullings are arranged, the preceding reduction ratio of pulling twice control is 15%~20%, subsequent four times pullings reduction ratio
By 20%~25% control;Chamfered edge is round as a ball again, finally presents a theatrical performance as the last item on a programme, and cuts water, riser;
D, are kept the temperature by 1.6~2.1 hours, then carries out control cooling to 680~750 DEG C for the Heating Steel Ingots of step C completion, it is cold
But speed is 50 DEG C/h;
E, the workpiece is heated to 1100 DEG C and keeps the temperature 2h, oil is reheated to 650~700 DEG C of temperature after being cooled to 150 DEG C
Range simultaneously keeps the temperature 4h, and mist is cold later.
Preferably, carrying out 13.5~14.5 hours isothermal holdings after the first time jumping-up.
Preferably, carrying out 10.5 hours isothermal holdings after second of jumping-up.
Compared with prior art, the invention has the advantages that product in it is uniform in structure refinement, have good continuity and
Compactness, not easy to crack, impact flexibility, thermal fatigue resistance are strong, long service life.
Specific embodiment
Embodiment one
A kind of forging technology of roller press squeeze roll, it is characterised in that: comprise the following steps that:
A, it casts embryo material steel ingot, chemical component weight percentage in steel ingot are as follows: C:0.35%, Si:1.5%, Al:20%, Mg:
0.022%, Mn:0.2%, Cr:0.005%, W:0.5%, Nb:0.0055%, V:0.5%, Cu:1.0%, Ti:0.15%, B:
0.25, Fe:0.8%, Mo:0.5%, S:0.6%, surplus are Zn and inevitable impurity, and the steel ingot temperature of cast molding is down to
300 DEG C, 650 DEG C are again heated to, keeps the temperature 3 hours, is furnace-cooled to 350 DEG C, keeps the temperature 3 hours, is again heated to 550 DEG C, keeps the temperature 6 hours,
350 DEG C are cooled to 20 DEG C/h, it is air-cooled later;
B, the Heating Steel Ingots for completing step a carry out first time jumping-up, the pulling of WHF method, the ratio of height to diameter control after pulling to 1235 DEG C
System is 2.0, and total forging ratio is 2.0;Anvil width ratio W/H=0.6 when WHF method pulls out, material is wide to arrange 10 times pullings than B/H=0.80,
The reduction ratio control that head pulls out twice is 10%, and subsequent 8 times pulling reduction ratios are by 15% control;It is round as a ball that chamfered edge is carried out again, chamfered edge
Deformation is depressed using unilateral gradation, and a reduction ratio is less than 8%;
C, 880 DEG C are heated to the step b steel ingot completed for the second time, carries out second of jumping-up, wide flat anvil limit pulling, forging
Than being 1.5,8 times pullings are arranged, the preceding reduction ratio of pulling twice control is 15%, and subsequent four times pulling reduction ratios are by 20% control;
Chamfered edge is round as a ball again, finally presents a theatrical performance as the last item on a programme, and cuts water, riser;
D, are kept the temperature by 1.6 hours, then carries out control cooling, cooling velocity 50 to 680 DEG C for the Heating Steel Ingots of step C completion
℃/h;
E, the workpiece is heated to 1100 DEG C and keeps the temperature 2h, oil is reheated to 650 DEG C of temperature range simultaneously after being cooled to 150 DEG C
4h is kept the temperature, mist is cold later.
In real work, after the first time jumping-up, 13.5 hours isothermal holdings are carried out.
In real work, after second of jumping-up, 10.5 hours isothermal holdings are carried out.
Embodiment two
A kind of forging technology of roller press squeeze roll, it is characterised in that: comprise the following steps that:
A, it casts embryo material steel ingot, chemical component weight percentage in steel ingot are as follows: C:0.4%, Si:2%, Al:22%, Mg:
0.03%, Mn:0.35%, Cr:0.008%, W:1%, Nb:0.006%, V:1%, Cu:1.3%, Ti:0.2%, B:
0.3%, Fe:0.9%, Mo:0.8%, S:0.09%, surplus are Zn and inevitable impurity, and the steel ingot temperature of cast molding drops
To 300 DEG C, 700 DEG C are again heated to, keeps the temperature 4 hours, is furnace-cooled to 350 DEG C, keeps the temperature 3 hours, is again heated to 580 DEG C, heat preservation 7 is small
When, 350 DEG C are cooled to 20 DEG C/h, it is air-cooled later;
B, the Heating Steel Ingots for completing step a carry out first time jumping-up, the pulling of WHF method, the ratio of height to diameter control after pulling to 1250 DEG C
System is 2.1, and total forging ratio is 2.15;Anvil width ratio W/H=0.7 when WHF method pulls out, material is wide to arrange 10 times pullings than B/H=0.9,
The reduction ratio control that head pulls out twice is 13%, and subsequent 8 times pulling reduction ratios are by 18% control;It is round as a ball that chamfered edge is carried out again, chamfered edge
Deformation is depressed using unilateral gradation, and a reduction ratio is less than 8%;
C, 880 DEG C are heated to the step b steel ingot completed for the second time, carries out second of jumping-up, wide flat anvil limit pulling, forging
Than being 1.9,8 times pullings are arranged, the preceding reduction ratio of pulling twice control is 18%, and subsequent four times pulling reduction ratios are by 23% control;
Chamfered edge is round as a ball again, finally presents a theatrical performance as the last item on a programme, and cuts water, riser;
D, are kept the temperature by 1.9 hours, then carries out control cooling, cooling velocity 50 to 700 DEG C for the Heating Steel Ingots of step C completion
℃/h;
E, the workpiece is heated to 1100 DEG C and keeps the temperature 2h, oil is reheated to 680 DEG C of temperature range simultaneously after being cooled to 150 DEG C
4h is kept the temperature, mist is cold later.
In real work, after the first time jumping-up, 14 hours isothermal holdings are carried out.
In real work, after second of jumping-up, 10.5 hours isothermal holdings are carried out.
Embodiment three
A kind of forging technology of roller press squeeze roll, it is characterised in that: comprise the following steps that:
A, it casts embryo material steel ingot, chemical component weight percentage in steel ingot are as follows: C:0.45%, Si:2.5%, Al:23%, Mg:
0.032%, Mn:0.38%, Cr:0.01%, W:1.5%, Nb:0.0065%, V:1.5%, Cu:1.5%, Ti:0.25%,
B:0.35%, Fe:1%, Mo:0.9%, S:0.1%, S≤0.1%, surplus be Zn and inevitable impurity, cast molding
Steel ingot temperature is down to 300 DEG C, is again heated to 750 DEG C, keeps the temperature 3~5 hours, is furnace-cooled to 350 DEG C, keeps the temperature 3 hours, is again heated to
600 DEG C, 8 hours are kept the temperature, is cooled to 350 DEG C with 20 DEG C/h, it is air-cooled later;
B, the Heating Steel Ingots for completing step a carry out first time jumping-up, the pulling of WHF method, the ratio of height to diameter control after pulling to 1255 DEG C
System is 2.2, and total forging ratio is 2.2;Anvil width ratio W/H=0.8 when WHF method pulls out, material is wide to arrange 10 times pullings than B/H=1.0,
The reduction ratio control that head pulls out twice is 15%, and subsequent 8 times pulling reduction ratios are by 20% control;It is round as a ball that chamfered edge is carried out again, chamfered edge
Deformation is depressed using unilateral gradation, and a reduction ratio is less than 8%;
C, 880 DEG C are heated to the step b steel ingot completed for the second time, carries out second of jumping-up, wide flat anvil limit pulling, forging
Than being 2.0,8 times pullings are arranged, the preceding reduction ratio of pulling twice control is 20%, and subsequent four times pulling reduction ratios are by 25% control;
Chamfered edge is round as a ball again, finally presents a theatrical performance as the last item on a programme, and cuts water, riser;
D, are kept the temperature by 2.1 hours, then carries out control cooling, cooling velocity 50 to 750 DEG C for the Heating Steel Ingots of step C completion
℃/h;
E, the workpiece is heated to 1100 DEG C and keeps the temperature 2h, oil is reheated to 700 DEG C of temperature range simultaneously after being cooled to 150 DEG C
4h is kept the temperature, mist is cold later.
In real work, after the first time jumping-up, 14.5 hours isothermal holdings are carried out.
In real work, after second of jumping-up, 10.5 hours isothermal holdings are carried out.
Claims (3)
1. a kind of forging technology of roller press squeeze roll, it is characterised in that: comprise the following steps that:
A, it casts embryo material steel ingot, chemical component weight percentage in steel ingot are as follows: 0.35%≤C≤0.45%, 1.5%≤Si≤
2.5%, 20%≤Al≤23%, 0.022%≤Mg≤0.032%, 0.2%≤Mn≤0.38%, 0.005%≤Cr≤
0.01%, 0.5%≤W≤1.5%, 0.0055%≤Nb≤0.0065%, 0.5%≤V≤1.5%, 1.0%≤Cu≤
1.5%, 0.15%≤Ti≤0.25%, 0.25≤B≤0.35%, 0.8%≤Fe≤1%, 0.5%≤Mo≤0.9%, S≤
0.1%, surplus is Zn and inevitable impurity, and the steel ingot temperature of cast molding is down to 300 DEG C, is again heated to 650~750
DEG C, keep the temperature 3~5 hours, be furnace-cooled to 350 DEG C, keep the temperature 3 hours, be again heated to 550~600 DEG C, keep the temperature 6~8 hours, with 20 DEG C/
Hour is cooled to 350 DEG C, air-cooled later;
B, the Heating Steel Ingots for completing step a carry out first time jumping-up, the pulling of WHF method, the height after pulling to 1235~1255 DEG C
Diameter is than control 2.0~2.2, and total forging ratio is 2.0~2.2;Width ratio B/ is expected in anvil width ratio W/H=0.6~0.8 when WHF method pulls out
H=0.80~1.0, arrange 10 times pullings, and the control of reduction ratio that head pulls out twice is 10~15%, subsequent 8 times pullings reduction ratio
By 15~20% controls;It is round as a ball that chamfered edge is carried out again, and chamfered edge deformation is depressed using unilateral gradation, and a reduction ratio is less than 8%;
C, 880 DEG C are heated to the step b steel ingot completed for the second time, carries out second of jumping-up, wide flat anvil limit pulling, forging
Than being 1.5~2.0,8 times pullings are arranged, the preceding reduction ratio of pulling twice control is 15%~20%, subsequent four times pullings reduction ratio
By 20%~25% control;Chamfered edge is round as a ball again, finally presents a theatrical performance as the last item on a programme, and cuts water, riser;
D, are kept the temperature by 1.6~2.1 hours, then carries out control cooling to 680~750 DEG C for the Heating Steel Ingots of step C completion, it is cold
But speed is 50 DEG C/h;
E, the workpiece is heated to 1100 DEG C and keeps the temperature 2h, oil is reheated to 650~700 DEG C of temperature after being cooled to 150 DEG C
Range simultaneously keeps the temperature 4h, and mist is cold later.
2. a kind of forging technology of roller press squeeze roll according to claim 1, it is characterised in that: the first time jumping-up
Afterwards, 13.5~14.5 hours isothermal holdings are carried out.
3. a kind of forging technology of roller press squeeze roll according to claim 1, it is characterised in that: second of jumping-up
Afterwards, 10.5 hours isothermal holdings are carried out.
Priority Applications (1)
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CN201811169273.3A CN109365723A (en) | 2018-10-08 | 2018-10-08 | A kind of forging technology of roller press squeeze roll |
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CN201811169273.3A CN109365723A (en) | 2018-10-08 | 2018-10-08 | A kind of forging technology of roller press squeeze roll |
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CN109365723A true CN109365723A (en) | 2019-02-22 |
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CN201811169273.3A Pending CN109365723A (en) | 2018-10-08 | 2018-10-08 | A kind of forging technology of roller press squeeze roll |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113953422A (en) * | 2021-10-21 | 2022-01-21 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
-
2018
- 2018-10-08 CN CN201811169273.3A patent/CN109365723A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113953422A (en) * | 2021-10-21 | 2022-01-21 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
CN113953422B (en) * | 2021-10-21 | 2023-12-22 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
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Application publication date: 20190222 |