CN107138660A - A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization - Google Patents
A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization Download PDFInfo
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- CN107138660A CN107138660A CN201710507201.4A CN201710507201A CN107138660A CN 107138660 A CN107138660 A CN 107138660A CN 201710507201 A CN201710507201 A CN 201710507201A CN 107138660 A CN107138660 A CN 107138660A
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- ring billet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
- B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
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- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
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Abstract
The invention discloses a kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization, comprise the following steps：S1, ring billet is heated to slightly above material critical temperature Ac in heating furnace1, insulation a period of time；S2, by the ring billet after heating with stove slow cooling to slightly below material critical temperature Ar1；S3, rationally design rolling ratio and selection rolling feed speed, make ring billet roll forming in certain deflection and deformation temperature range.The present invention is directly realized by tissue nodularization by warm-rolling ring, can cancel traditional spheroidizing, and obtains more tiny spherodized structure, significantly reduces the energy and time loss, improves liver mass, reduces production cost.
Description
Technical field
The invention belongs to moulding processing technique field, and in particular to a kind of high-carbon-chromium bearing steel warm-rolling for realizing tissue nodularization
Loop forming method.
Background technology
High-carbon-chromium bearing steel is the main use steel of bearing parts, typical case's such as GCr15 bearing steels, in the inside and outside lasso life of bearing
Produce in (abbreviation bearer ring) and widely apply.Ring is rolled as the advanced revolution Plastic Forming side of seamless ring-shaped work pieces (abbreviation ring)
Method, with its energy-conservation, section material, high-quality, efficient technical advantage, progressively replaces traditional forging forming method, with bearer ring
To be widely applied and generally approving in the ring-shaped work pieces manufacturing of representative.For high-carbon-chromium bearing steel ring, with allusion quotation
Exemplified by the GCr15 bearer rings of type, the ring method of rolling used in current industrial production includes cold rolling ring and hot rolling ring, and the former mainly uses
In medium and small bearer ring normal temperature cold forming, the latter be then generally used in, the interval hot forming of large size bearing ring forging temperature.
Because high-carbon-chromium bearing steel plasticity is low, hardness and intensity height, cold forming and machinability are poor, therefore high-carbon
Chromium bearing steel ring is forged or rolled in ring production, and spheroidizing is always essential important procedure, by ring billet or ring
Forging carries out spheroidizing processing, makes the carbide spheroidization in material sheet pearlitic structrure and forms granular pearlite tissue,
So as to improve plasticity, reduction hardness and intensity, to meet manufacturing process requirement.For example, it is necessary to ring billet in the production of cold rolling ring
Spheroidizing is carried out to improve cold plasticity processibility；Moved back in hot rolling ring and forging, it is necessary to carry out nodularization to ring forging
Fire improves machinability.However, the isothermal spheroidizing generally used in current high-carbon-chromium bearing steel ring industrial production is moved back
Ignition technique, generally required for more than ten hours, not only cycle length, high energy consumption, and was easily caused that carbide particle is thick, skin decarburization
It is big with degree of oxidation, hereditation can all be caused to following process and final heat treatment quality.Although currently on high carbon chromium axle
Hold the research of steel Fast Spheroidizing Annealing and be disclosed report, but do not obtain practical application in industry, especially in high carbon chromium bearing
In the production of steel loop part, still using traditional annealing process, very big limitation is caused to reducing cost and improving quality.
Therefore, in face of current manufacturing industry energy-saving and emission-reduction, high added value production development trend, above-mentioned high-carbon-chromium bearing steel in the urgent need to address
Ring spheroidizing problem.
The content of the invention
For above-mentioned present situation, it is an object of the invention to provide a kind of high-carbon-chromium bearing steel warm-rolling ring for realizing tissue nodularization
Manufacturing process, it makes the direct nodularization of material structure by warm-rolling annular strain, realizes shaping-ball under less than material forging temperature
Change integration, traditional annealing process can be saved, improve efficiency and reduction energy consumption.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization, this method comprises the following steps：
S1, the heating of low temperature austenitizing：The ring billet processed is put into heating furnace and is heated to slightly above material critical temperature
Spend Ac1, it is incubated 5~10min；
Slow cooling in S2, stove：The ring billet for being incubated completion is slowly cooled into slightly below material critical temperature in heating furnace with stove
Spend Ar1, cooling velocity control is in 100 DEG C/h~200 DEG C/h；
S3, warm-rolling shaping：Ring billet after cooling is rolled from heating furnace on fast transfer to machine for rolling ring, ring billet becomes
Shape amount is controlled 40%~70%, and finishing temperature control is in Ar1Below within 100 DEG C.
By above-mentioned technical proposal, in step sl, ring billet is heated to Ac in heating furnace110 DEG C~40 DEG C of the above.
By above-mentioned technical proposal, in step s 2, ring billet is cooled to Ar in heating furnace10 DEG C below~50 DEG C.
By above-mentioned technical proposal, in step s3, ring billet temperature is monitored in real time in the operation of rolling, when ring billet temperature is low
Terminate rolling immediately when finishing temperature, ring billet is melted down and is further continued for rolling after being heated to default breaking down temperature, until being configured to
Target ring.
The present invention, has the advantages that：The present invention is based on suitable rolling mill practice condition, makes material in critical-temperature
Effective tissue nodularization condition is obtained during following warm working, so as to realize tissue nodularization while undergoing deformation：Lead to first
Suitable heating condition is crossed, material is obtained incomplete, uneven austenite structure；Then under suitable cooling condition,
Carbide particle is decomposited by overcooling austenite abnormality and is suppressed it and normally decomposites carbide lamella；Finally by suitable deformation
Condition, carbon is promoted to carbide particle diffusion aggregation by temperature and stress, and the carbide for promoting part to be formed
The broken nodularization of layer, finally obtains the tissue of complete nodularization after rolling.Because above-mentioned tissue nodularization process is in the fast speed rolling of low temperature
During complete, carbide particle does not have the curing of sufficient time to grow up so as to fine uniform, and rolling temperature is low, surface is not bright
Aobvious oxidation and decarburization, therefore, the present invention are directly realized by tissue nodularization by warm-rolling annular strain, can save spheroidizing, phase
Spheroidizing is needed than cold rolling ring and hot rolling ring, energy consumption is significantly reduced, improves efficiency, and carbide particle is tiny, table
Face quality is good, is conducive to following process and final heat treatment quality, is given birth to shortening technological process, reducing production cost, raising
Produce efficiency, the beneficial effect of Improving The Quality of Products.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the process schematic representation of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
In the preferred embodiment, a kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization,
As shown in figure 1, this method comprises the following steps：
S1, the heating of low temperature austenitizing：The ring billet processed is put into heating furnace and is heated to slightly above material critical temperature
Spend Ac1, it is incubated 5~10min；
Slow cooling in S2, stove：The ring billet for being incubated completion is slowly cooled into slightly below material critical temperature in heating furnace with stove
Spend Ar1, cooling velocity control is in 100 DEG C/h~200 DEG C/h；
S3, warm-rolling shaping：Ring billet after cooling is rolled from heating furnace on fast transfer to machine for rolling ring, according to mesh
Ring size, the machine for rolling ring range of work and power energy condition are marked, rationally design rolling ratio and selection rolling feed speed become ring billet
The control of shape amount is in 40%~70% (ring billet deflection is calculated with ring billet wall thickness reduction), finishing temperature control in Ar1Below
Within 100 DEG C, ring billet roll forming in the deflection and deformation temperature range.
In a preferred embodiment of the invention, in step sl, ring billet is heated to Ac in heating furnace110 DEG C of the above~
40℃。
In a preferred embodiment of the invention, in step s 2, ring billet is cooled to Ar in heating furnace10 DEG C below~
50℃。
In a preferred embodiment of the invention, in step s3, monitoring ring billet temperature (is specially in real time in the operation of rolling
Ring billet temperature is strictly monitored using temperature measuring equipment), rolling is terminated immediately when ring billet temperature is less than finishing temperature, and ring billet is melted down
Rolling is further continued for after being heated to default breaking down temperature, until being configured to target ring.
Two embodiments are exemplified below the present invention is further described.
Embodiment 1
By taking certain specification GCr15 high-carbon-chromium bearing steel rings as an example, it realizes the warm-rolling loop forming method of tissue nodularization, including
Following steps：
S1, the heating of low temperature austenitizing：Ring billet is heated to 780 DEG C of (Ac in chamber type electric resistance furnace1About 750 DEG C), protect
Temperature 10 minutes；
Slow cooling in S2, stove：The ring billet completed will be incubated with 200 DEG C/h cooling velocity in descent of temperature to 650 DEG C of (Ar1
About 700 DEG C)；
S3, warm-rolling shaping：The ring billet for being up to default breaking down temperature is rolled from heating furnace on fast transfer to machine for rolling ring,
Under the conditions of suitable rolling ratio and rolling feed speed, ring billet becomes in 600 DEG C of temperatures above by the rolling of 40% deflection
Shape and be configured to target ring, the subsequent air cooling of target ring.
Embodiment 2
By taking certain specification GCr15SiMn high-carbon-chromium bearing steel rings as an example, it realizes the warm-rolling loop forming method of tissue nodularization,
Comprise the following steps：
S1, the heating of low temperature austenitizing：Ring billet is heated to 790 DEG C of (Ac in chamber type electric resistance furnace1About 770 DEG C), protect
Temperature 5 minutes；
(2) slow cooling in stove：The ring billet completed will be incubated with 200 DEG C/h cooling velocity in descent of temperature to 710 DEG C of (Ar1
About 710 DEG C)；
(3) warm-rolling shapes：The ring billet for being up to default breaking down temperature is rolled from heating furnace on fast transfer to machine for rolling ring,
Under the conditions of suitable rolling ratio and rolling feed speed, ring billet becomes in 610 DEG C of temperatures above by the rolling of 70% deflection
Shape and be configured to target ring, the subsequent air cooling of target ring.
Above-mentioned two embodiment is shaped to the spherodized structure of obtained target ring acquisition with being obtained using common spheroidizing
The spherodized structure obtained, which is compared, to be obtained, and warm-rolling cyclohexyl carbodiimide composition granule average diameter is about 0.25 μm, common spheroidizing carbonization
Composition granule average diameter is about 0.46 μm, it can be seen that can not only realize high carbon chromium axle using warm-rolling loop forming method of the present invention
Hold structure of steel nodularization, and can notable refined carbides particle, improve spherodized structure quality.
The present disclosure additionally applies for other high-carbon-chromium bearing steel material rings, its method is same as the previously described embodiments, effect
It is identical, do not enumerate embodiment one by one herein.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (4)
1. a kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization, it is characterised in that this method includes following
Step：
S1, the heating of low temperature austenitizing：The ring billet processed is put into heating furnace and is heated to slightly above material critical temperature Ac1,
It is incubated 5~10min；
Slow cooling in S2, stove：The ring billet for being incubated completion is slowly cooled into slightly below material critical temperature Ar in heating furnace with stove1,
Cooling velocity is controlled in 100 DEG C/h~200 DEG C/h；
S3, warm-rolling shaping：Ring billet after cooling is rolled from heating furnace on fast transfer to machine for rolling ring, ring billet deflection
Control is 40%~70%, and finishing temperature control is in Ar1Below within 100 DEG C.
2. the high-carbon-chromium bearing steel warm-rolling loop forming method according to claim 1 for realizing tissue nodularization, it is characterised in that
In step sl, ring billet is heated to Ac in heating furnace110 DEG C~40 DEG C of the above.
3. the high-carbon-chromium bearing steel warm-rolling loop forming method according to claim 1 for realizing tissue nodularization, it is characterised in that
In step s 2, ring billet is cooled to Ar in heating furnace10 DEG C below~50 DEG C.
4. the high-carbon-chromium bearing steel warm-rolling loop forming method according to claim 1 for realizing tissue nodularization, it is characterised in that
In step s3, monitor ring billet temperature in real time in the operation of rolling, rolling terminated immediately when ring billet temperature is less than finishing temperature,
Ring billet is melted down and is further continued for rolling after being heated to default breaking down temperature, until being configured to target ring.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507201.4A CN107138660B (en) | 2017-06-28 | 2017-06-28 | A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization |
| PCT/CN2018/090766 WO2019001262A1 (en) | 2017-06-28 | 2018-06-12 | Process for forming, by means of warm ring rolling, high-carbon chromium bearing steel capable of structure spheroidization |
| JP2019513306A JP6698940B2 (en) | 2017-06-28 | 2018-06-12 | Warm rolling ring forming method for high carbon chrome bearing steel with spherical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507201.4A CN107138660B (en) | 2017-06-28 | 2017-06-28 | A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization |
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| Publication Number | Publication Date |
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| CN107138660A true CN107138660A (en) | 2017-09-08 |
| CN107138660B CN107138660B (en) | 2018-08-07 |
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| CN201710507201.4A Active CN107138660B (en) | 2017-06-28 | 2017-06-28 | A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization |
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| JP (1) | JP6698940B2 (en) |
| CN (1) | CN107138660B (en) |
| WO (1) | WO2019001262A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019001262A1 (en) * | 2017-06-28 | 2019-01-03 | 武汉理工大学 | Process for forming, by means of warm ring rolling, high-carbon chromium bearing steel capable of structure spheroidization |
| CN109593949A (en) * | 2019-01-31 | 2019-04-09 | 武汉理工大学 | A kind of high-carbon chromium steel bearing ring deformation-phase transformation collaboration spheronization process |
| CN109680136A (en) * | 2019-03-07 | 2019-04-26 | 攀钢集团江油长城特殊钢有限公司 | High-carbon stocking and its preparation method and application |
| CN109797274A (en) * | 2019-01-31 | 2019-05-24 | 武汉理工大学 | A kind of compound deformation spheronization process of high-carbon chromium steel bearing ring Wen-heat |
| CN111041178A (en) * | 2019-12-20 | 2020-04-21 | 上海交通大学 | Preparation method of high-strength high-toughness double-phase steel by circulating rolling |
| CN112828537A (en) * | 2020-12-31 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Composite manufacturing method for roll neck of roll |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN113894242A (en) * | 2021-09-16 | 2022-01-07 | 济源市天合特钢锻压有限公司 | Roller and forging and pressing forming process thereof |
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| CN113957209A (en) * | 2021-09-07 | 2022-01-21 | 材谷金带(佛山)金属复合材料有限公司 | High-carbon chromium bearing steel high-intensity magnetic field rapid spheroidizing annealing process |
| CN114247750B (en) * | 2021-11-17 | 2024-01-23 | 邢台钢铁有限责任公司 | Process for improving stress crack of medium carbon alloy cold heading steel hot rolled blank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019001262A1 (en) * | 2017-06-28 | 2019-01-03 | 武汉理工大学 | Process for forming, by means of warm ring rolling, high-carbon chromium bearing steel capable of structure spheroidization |
| CN109593949A (en) * | 2019-01-31 | 2019-04-09 | 武汉理工大学 | A kind of high-carbon chromium steel bearing ring deformation-phase transformation collaboration spheronization process |
| CN109797274A (en) * | 2019-01-31 | 2019-05-24 | 武汉理工大学 | A kind of compound deformation spheronization process of high-carbon chromium steel bearing ring Wen-heat |
| CN109593949B (en) * | 2019-01-31 | 2020-06-19 | 武汉理工大学 | Deformation-phase change synergetic spheroidizing method for high-carbon chromium steel bearing ring |
| CN109797274B (en) * | 2019-01-31 | 2020-08-04 | 武汉理工大学 | Temperature-thermal composite deformation spheroidizing method for high-carbon chromium steel bearing ring |
| CN109680136A (en) * | 2019-03-07 | 2019-04-26 | 攀钢集团江油长城特殊钢有限公司 | High-carbon stocking and its preparation method and application |
| CN111041178A (en) * | 2019-12-20 | 2020-04-21 | 上海交通大学 | Preparation method of high-strength high-toughness double-phase steel by circulating rolling |
| CN112828537A (en) * | 2020-12-31 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Composite manufacturing method for roll neck of roll |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN112853079B (en) * | 2020-12-31 | 2024-02-13 | 无锡派克新材料科技股份有限公司 | Forming method of large-diameter thin-wall high-cylinder type ultra-high strength steel D406A ring forging |
| CN113894242A (en) * | 2021-09-16 | 2022-01-07 | 济源市天合特钢锻压有限公司 | Roller and forging and pressing forming process thereof |
| CN113894242B (en) * | 2021-09-16 | 2024-02-20 | 济源市天合特钢锻压有限公司 | Roller and forging forming process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019532180A (en) | 2019-11-07 |
| CN107138660B (en) | 2018-08-07 |
| JP6698940B2 (en) | 2020-05-27 |
| WO2019001262A1 (en) | 2019-01-03 |
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