CN109504895A - A kind of saw bit matrix wide cut steel band and its manufacturing method - Google Patents
A kind of saw bit matrix wide cut steel band and its manufacturing method Download PDFInfo
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- CN109504895A CN109504895A CN201811071734.3A CN201811071734A CN109504895A CN 109504895 A CN109504895 A CN 109504895A CN 201811071734 A CN201811071734 A CN 201811071734A CN 109504895 A CN109504895 A CN 109504895A
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- steel band
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a kind of saw bit matrix wide cut steel bands and manufacturing method, the saw bit matrix is as follows with wide cut steel band chemical component mass content: C 0.72-0.8%, Si 0.2-0.45%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr 0.2-0.5%, V 0.01-0.05%, surplus Fe, it is also possible to contain micro inevitable impurity；0 representative therein is infinitely close to 0 but is not 0；Saw bit matrix wide cut steel band with a thickness of 1.2~4.5mm, width 1250mm.The quality requirement of steel for saw blade substrate band of the invention through test of many times and the intensity on probation for having fully met steel for saw blade substrate, hardness, dimensional accuracy, flatness and spherodized structure, it has been enjoyed great popularity by client at present, therefore its great application value, prospect are very wide.
Description
(1) technical field
The present invention relates to a kind of saw bit matrix wide cut steel bands and its manufacturing method.
(2) background technique
With the rapid development of the industries such as manufacture, saw blade industry requirement amount is increased rapidly, and many saw blade factories are immediately following domestic hair
Exhibition trend, thus it is more demanding to the comprehensive performance after saw bit matrix steel Q-tempering, and foreign countries are all for high-grade saw bit matrix
Use 75Cr1.
75Cr1 material is high carbon alloy steel, and intensity is very high, generally using laser cutting, before mostly by ribbon steel
Factory's production, ribbon steel production steel alloy is opposite to be easier to, but precision is low, and template is poor, group low by electric furnace limit temperature of annealing
Difference is knitted, and with a large amount of uses of laser wide cut cutting machine, narrowband efficiency is substantially reduced.With environmental protection pressure in recent years, narrowband
Steel mill all suffers from greatly the situation shut down, and needs to meet market as this bro ad hot strip release higher product of quality of our companies
Demand.
According to the actual use demand of saw blade steel, our actual process are designed as saw blade steel 75Cr1.
According to a large amount of investigational datas to client, the demand of saw blade steel to steel band is determined are as follows:
There are decarburizations because of surface for common 75Cr1 steel in the market, and Oxygen potential is inadequate, and harden ability is inadequate, width is narrow, inclined
Hard and thickness and precision difference can not fully meet high-grade steel for saw blade substrate manufacture and use demand.
(3) summary of the invention
It is an object of the present invention to provide it is a kind of meet production saw bit matrix product quality requirement steel for saw blade substrate band and
Its manufacturing method.
The technical solution adopted by the present invention is that:
A kind of saw bit matrix is with wide cut steel band (75Cr1), and chemical component mass content is as follows: C 0.72-0.8%, Si
0.2-0.45%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr 0.2-0.5%, V 0.01-0.05%, it is remaining
Amount is Fe, it is also possible to contain micro inevitable impurity；0 representative therein is infinitely close to 0 but is not 0；
Further, it is preferred that the chemical component mass content of saw bit matrix wide cut steel band is as follows: C 0.72-
0.78%, Si 0.2-0.4%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr 0.3-0.5%, V 0.01-
0.05%, surplus Fe, it is also possible to contain micro inevitable impurity；0 representative therein is infinitely close to 0 but is not
0。
Saw bit matrix wide cut steel band with a thickness of 1.2~4.5mm, width 1250mm.
The invention further relates to the manufacturing method of the steel for saw blade substrate band, the method is specifically in accordance with the following steps
It carries out:
(1) hot rolling:
Hot rolling material chemical component mass content is as follows:
C 0.72-0.78%, Si 0.2-0.4%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr
0.3-0.5%, V 0.01-0.05%.Surplus is Fe, it is also possible to contain micro inevitable impurity；Therein 0 represents
It is infinitely close to 0 but is not 0；
The hot fine rolling finishing temperature is 890 ± 20 DEG C, and finish to gauge coiling temperature is 670 ± 20 DEG C；
(2) pre-spheroidizing is annealed:
The coil of strip that the hot rolling obtains uses chlorohydric acid pickling, and concentration controls between 7%~17% (w/w), to remove table
The iron scale in face；Then pre-spheroidizing annealing is carried out, the pre-spheroidizing annealing process is as follows:
It is warming up to 400 DEG C~450 DEG C and keeps the temperature 4 hours, then be warming up to 740 DEG C and keep the temperature 13 hours, be cooled to 680 DEG C of heat preservations 6
A hour, 335 DEG C of sprays, 80 DEG C are come out of the stove；Annealing is carried out using Full Hydrogen Bell Type Annealing Furnace；
Coil of strip is warming up to complete austenitizing after 740 DEG C of 13 hours of heat preservation, then is down to 680 DEG C of abundant nodularizations of heat preservation, shape
At the globular pearlite of fine uniform.
(3) once cold rolling:
Steel band after pre-spheroidizing is annealed is rolled using double-stand reversible mill to be batched through hightension again, after rolling
Obtain cold-rolled strip；The unit is equipped with a full set of Siemens's field bus control system, it can be achieved that whole process PLC is automatic
Control；Unit has complete hydraulic pressing, and hydraulic ACG is automatically controlled；Crew qiting plate profile instrument, using x-ray calibrator, and it is online
Observe the high-resolution photographic device of plate surface quality, it is ensured that the steel band precision and template shut out reaches first-class level, through reality
Thickness of strips precision is detected at ± 15 μm；
Because 75CR1 material belongs to high carbon tool steel, cold reduced work hardened very fast, the general overall reduction of once cold rolling is
0.8-1.0mm, point six passes, hightension batch, the secondary spheroidizing of shove charge after rolling；
(4) secondary spheroidizing:
Gained cold-rolled strip is warming up to 400 DEG C~450 DEG C and keeps the temperature 4 hours, then is warming up to 710 DEG C and keeps the temperature 8 hours, drop
Temperature is to 640 DEG C of 4 hours of heat preservation, and 335 DEG C of sprays, 80 DEG C are come out of the stove；The annealing is carried out using Full Hydrogen Bell Type Annealing Furnace；
(5) secondary finish rolling:
75CR1 steel band internal grain nodularization after secondary spheroidizing is uniformly tiny sufficiently, strength reduction, extensibility
It can be promoted, 0.06-0.15mm is depressed using single chassis reversable mill, reached the thickness and hardness of final products needs, lead to simultaneously
It crosses secondary finish rolling and obtains good template and surface；
(6) crosscutting:
Steel band after the secondary finish rolling is divided into the wide cut steel band of target width through cross shearing unit；The wide cut steel
The length accuracy of band is 0-2mm, no wave, no wooden dipper song.
The present invention selects special hot rolled strip, strict demand is made on composition and hot rolling technology, at first using the whole world
Into Ai Baina full-hydrogen hood-type annealing furnace the abundant nodularization of steel band crystal grain is guaranteed using high temperature spheroidizing；Cold rolling then uses double
The rolling of rack reversable mill, mating Siemens's electric-control system ensure that the thickness and precision of steel band；It develops for saw bit matrix
With the specific perhydro annealing process and cold-rolling process of steel band performance requirement, final products testing result is met customer need target
Value 95% or more, become the example of technical progress of industry, push domestic and international cold-rolled strip annealing process and rolling
The progress of technique provides good raw material to downstream client.
Steel band quality requirement:
1) steel band mechanical property:
Steel band tension test takes lateral sample, and mechanical property need to meet following table regulation:
2) metallographic structure
Steel band tissue nodularization is abundant, and for Oxygen potential up to 90%, nodulizing grade is 3 grades；
3) surface quality
Steel strip surface must not scab, crackle, drawing crack, be mingled with, iron scale, iron rust and layering, be not allow for blue oxidation
Color and yellow membrane phenomenon, allowing to have does not influence mouldability and painting, the defect for plating adhesive force, such as minute bubbles, small scratch, small roll marks, light
Micro- scuffing and oxidation tint etc. allow to exist.
Compared with prior art, the beneficial effects are mainly reflected as follows:
(1) hot rolling raw material chemical analysis is used by the design production of defined composition, the temperature that hot rolling production is batched using low temperature
Degree system, it is ensured that steel plate interior tissue crystal grain is uniform tiny after hot rolling；
(2) using advanced double-stand reversible mill rolling is configured, guarantee thickness and precision and template；
(3) it is annealed using specific perhydro annealing process, high temperature spheroidizing is carried out to steel plate, guarantees steel plate crystal grain
Complete nodularization；
(4) flat, band 13 roller of major diameter aligning, opening plate good plate cut are opened using the crosscutting equipment of high-precision, no wooden dipper song is protected
Demonstrate,prove the direct requirement of downstream client；
Steel for saw blade substrate band of the invention through test of many times and the on probation intensity for having fully met steel for saw blade substrate,
The quality requirement of hardness, dimensional accuracy, flatness and spherodized structure, is enjoyed great popularity by client at present, therefore its pole
Has application value, prospect is very wide.
(3) Detailed description of the invention
Fig. 1 is the typical metallographic structure of saw bit matrix wide cut steel band.
(4) specific embodiment
The present invention is described further combined with specific embodiments below, but protection scope of the present invention and not only limits
In this:
Embodiment 1 (75CR1):
(1) hot rolling:
Hot rolling raw material composition see the table below:
| Serial number | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | V (%) |
| 1 | 0.75 | 0.25 | 0.71 | 0.012 | 0.002 | 0.35 | 0.02 |
| 2 | 0.76 | 0.22 | 0.69 | 0.014 | 0.003 | 0.38 | 0.03 |
| 3 | 0.75 | 0.26 | 0.67 | 0.011 | 0.002 | 0.40 | 0.03 |
Surplus is Fe and micro inevitable impurity；
Hot fine rolling finishing temperature is 890 ± 20 DEG C, and finish to gauge coiling temperature is 650 ± 20 DEG C；
(2) pickling
Coils of hot-rolled steel passes through plug-type shallow slot turbulence acid dip unit pickling, using chlorohydric acid pickling, concentration control 7%~
Between 17% (w/w), scale on surface is removed；
(3) pre-spheroidizing is annealed
Annealing uses Full Hydrogen Bell Type Annealing Furnace, anneals by following setting technique:
| Annealing process control parameter title | Parameters controlling value |
| Steel grade | 75CR1 |
| Thickness (mm) | 2.75 |
| Width (mm) | 1250 |
| Batch (T) | 80~95 |
| First segment heating | It heats at full speed |
| First segment keeps the temperature platform (DEG C) | 400~450 |
| First segment soaking time (h) | 4 |
| Second segment heats used time (h) | 8 |
| Second segment holding temperature (DEG C) | 740 |
| Second segment soaking time (h) | 13 |
| Third section holding temperature (DEG C) | 680 |
| Third section soaking time (h) | 6 |
| It sprays temperature (DEG C) | 335 |
| Tapping temperature (DEG C) | 80 |
(4) once cold rolling
Coil of strip is rolled through double-stand reversible mill after pre-spheroidizing annealing, and pressure total amount is 1mm；(5) secondary spheroidizing:
Annealing uses Full Hydrogen Bell Type Annealing Furnace, anneals by following setting technique:
(6) secondary finish rolling:
Secondary finish rolling is carried out using single chassis reversable mill, rolls 1.62mm, actual (real) thickness 1.57-1.63mm；
(7) crosscutting:
It is opened and is put down to specification needed for client using vertical cross shearing unit；
Steel band quality testing is made:
1) steel band mechanical property: steel band tension test takes lateral sample, and mechanical property is as follows:
2) surface quality
Steel strip surface without scab, crackle, drawing crack, be mingled with, iron scale, iron rust and layering, no blue oxidation tint and yellow membrane it is existing
As.
3) metallographic structure
The band typical metallographic structure of 75CR1 of 1# sample steel for saw blade substrate is made referring to Fig. 1, which is globular pearlite,
Oxygen potential 90%, nodulizing grade are 3 grades.
Comparative example:
(1) hot rolling raw material composition:
| Serial number | C (%) | Si (%) | Mn (%) | P (%) | S (%) | V (%) |
| 1 | 0.78 | 0.24 | 0.75 | 0.012 | 0.002 | 0.02 |
| 2 | 0.79 | 0.21 | 0.80 | 0.014 | 0.003 | 0.03 |
| 3 | 0.77 | 0.25 | 0.74 | 0.011 | 0.002 | 0.03 |
Surplus is Fe and micro inevitable impurity；
Hot fine rolling finishing temperature is 890 ± 20 DEG C, and finish to gauge coiling temperature is 600 ± 20 DEG C；
(2) cold rolling feeds thickness, cold roling reduction are also 1mm, same finish rolling to 1.62mm, all consistent with embodiment,.
(3) twice annealing equally carries out all in Full Hydrogen Bell Type Annealing Furnace, and annealing process is consistent with embodiment respectively, pre-spheroidizing
Annealing is as shown in the table:
Secondary spheroidizing is as shown in the table:
(2) performance
Under raw thickness, rolling procedure same case, the cold-rolled strip end properties such as following table of same thickness is obtained
It is shown:
Compared with comparative example, elongation percentage is high, and the hardness and strength of steel band performance of the present invention are above comparative example, this hair
It is bright to have more excellent synthesis service performance.
Claims (3)
1. a kind of saw bit matrix wide cut steel band, it is characterised in that: saw bit matrix wide cut steel band chemical component quality
Content is as follows: C 0.72-0.8%, Si 0.2-0.45%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr
0.2-0.5%, V 0.01-0.05%, surplus Fe, it is also possible to contain micro inevitable impurity；Therein 0 represents nothing
Limit is close to 0 but is not 0；Saw bit matrix wide cut steel band with a thickness of 1.2~4.5mm, width 1250mm.
2. saw bit matrix as described in claim 1 wide cut steel band, it is characterised in that: saw bit matrix wide cut steel band
Chemical component mass content is as follows: C 0.72-0.78%, Si 0.2-0.4%, Mn 0.6-0.8%, P 0-0.035%, S 0-
0.035%, Cr 0.3-0.5%, V 0.01-0.05%, surplus Fe, it is also possible to contain micro inevitable impurity；Its
In 0 represent and be infinitely close to 0 but not for 0.
3. a kind of manufacturing method of saw bit matrix as described in claim 1 wide cut steel band, it is characterised in that: the method tool
Body carries out in accordance with the following steps:
(1) hot rolling:
Hot rolling material chemical component mass content is as follows:
C 0.72-0.8%, Si 0.2-0.45%, Mn 0.6-0.8%, P 0-0.035%, S 0-0.035%, Cr 0.2-
0.5%, V 0.01-0.05%, surplus Fe, it is also possible to contain micro inevitable impurity；0 representative therein infinitely connects
It is bordering on 0 but is not 0；
The hot fine rolling finishing temperature is 890 ± 20 DEG C, and finish to gauge coiling temperature is 670 ± 20 DEG C；
(2) pre-spheroidizing is annealed:
The coil of strip that the hot rolling obtains uses chlorohydric acid pickling, and concentration controls between 7%~17% (w/w)；Then pre- ball is carried out
Annealing, the pre-spheroidizing annealing process are as follows:
It is warming up to 400 DEG C~450 DEG C and keeps the temperature 4 hours, then be warming up to 740 DEG C and keep the temperature 13 hours, it is 6 small to be cooled to 680 DEG C of heat preservations
When, 335 DEG C of sprays, 80 DEG C are come out of the stove；Annealing is carried out using Full Hydrogen Bell Type Annealing Furnace；
Coil of strip is warming up to complete austenitizing after 740 DEG C of 13 hours of heat preservation, then is down to 680 DEG C of abundant nodularizations of heat preservation, is formed thin
Small uniform globular pearlite.
(3) once cold rolling:
Steel band after pre-spheroidizing is annealed is rolled using double-stand reversible mill to be batched through hightension again, is obtained after rolling cold
Strip rolling；
The once cold rolling overall reduction is 0.8-1.0mm, divides six passes, and hightension batches, and shove charge carries out after rolling
It operates in next step；
(4) secondary spheroidizing:
Gained cold-rolled strip is warming up to 400 DEG C~450 DEG C and keeps the temperature 4 hours, then is warming up to 710 DEG C and keeps the temperature 8 hours, is cooled to
640 DEG C of 4 hours of heat preservation, 335 DEG C of sprays, 80 DEG C are come out of the stove；The annealing is carried out using Full Hydrogen Bell Type Annealing Furnace；
(5) secondary finish rolling:
Steel band after secondary spheroidizing depresses 0.06-0.15mm using single chassis reversable mill；
(6) crosscutting:
Steel band after the secondary finish rolling is divided into the wide cut steel band of target width through cross shearing unit；Length accuracy is 0-2mm,
Without wave, no wooden dipper is bent.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284061A (en) * | 2019-06-28 | 2019-09-27 | 邯郸钢铁集团有限责任公司 | A kind of high temperature resistant deformation 75Cr1 steel saw blade and its production technology |
| CN111676422A (en) * | 2020-06-17 | 2020-09-18 | 苏州翔楼新材料股份有限公司 | Cold-rolled high-carbon steel strip for V-saw blade matrix and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745535A (en) * | 2010-01-21 | 2010-06-23 | 广州珠江钢铁有限责任公司 | Method for producing 75Cr1 hot-rolled sheet steel |
| CN107723613A (en) * | 2017-09-27 | 2018-02-23 | 浙江龙盛薄板有限公司 | A kind of paper cutting blade wide cut steel band and its manufacture method |
-
2018
- 2018-09-14 CN CN201811071734.3A patent/CN109504895A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745535A (en) * | 2010-01-21 | 2010-06-23 | 广州珠江钢铁有限责任公司 | Method for producing 75Cr1 hot-rolled sheet steel |
| CN107723613A (en) * | 2017-09-27 | 2018-02-23 | 浙江龙盛薄板有限公司 | A kind of paper cutting blade wide cut steel band and its manufacture method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284061A (en) * | 2019-06-28 | 2019-09-27 | 邯郸钢铁集团有限责任公司 | A kind of high temperature resistant deformation 75Cr1 steel saw blade and its production technology |
| CN111676422A (en) * | 2020-06-17 | 2020-09-18 | 苏州翔楼新材料股份有限公司 | Cold-rolled high-carbon steel strip for V-saw blade matrix and production method thereof |
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Application publication date: 20190322 |