CN102086493A - Stamped high-carbon chromium bearing ring and production process thereof - Google Patents
Stamped high-carbon chromium bearing ring and production process thereof Download PDFInfo
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- CN102086493A CN102086493A CN 201010581822 CN201010581822A CN102086493A CN 102086493 A CN102086493 A CN 102086493A CN 201010581822 CN201010581822 CN 201010581822 CN 201010581822 A CN201010581822 A CN 201010581822A CN 102086493 A CN102086493 A CN 102086493A
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Abstract
The invention discloses a stamped high-carbon chromium bearing ring and a production process thereof. The bearing ring comprises the following chemical compositions in percentage by mass: 0.95 to 1.05 percent of C, 0.25 to 0.45 percent of Mn, 0.15 to 0.35 percent of Si, 1.40 to 1.65 percent of Cr, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of P, less than or equal to 0.25 percent of Ni, less than or equal to 0.25 percent of Cu, and the balance of Fe. The production process comprises controlling of annealing and cold rolling, stamping and forming of the ring, and surface hardening, and is characterized in that: spheroidal annealing is performed on a hot-rolled steel plate strip by a two-phase region annealing process, namely the temperature is raised to 780 DEG C, heat is preserved in an austenite and pearlite two-phase region for 2 to 4 hours, the temperature is lowered to 700 DEG C along with a furnace, and heat is preserved for not less than 15 hours. The production process has the advantages that: a high-carbon chromium bearing steel hot-rolled plate strip which can meet the requirement on stamping performance and has a uniform spheroidized structure and high toughness is produced, materials are saved, production efficiency is high, and economic valve is remarkable.
Description
Technical field
The present invention relates to a kind of bearing ring and production technique thereof, more specifically say, it relates to a kind of punching press type high carbon chromium bearing ring and production technique thereof.
Background technology
Bearing is as a kind of base components commonly used, be widely used in various fields such as industry, agricultural, national defence, automobile and household electrical appliance, and the inside and outside lasso of bearing is a most important building block in the bearing, and their weight in average accounts for 70% of bearing, and cost accounts for 50%.In addition, the processing of bearing ring is one important procedure, at present, the blank of China's bearing ring is made kind forging, warm extrusion spare, cold-extruded spare, bar and pipe material, and mainly based on bar, pipe material, which kind of method is all wanted multitool turning to the starting material of employing, workload is big, it is bigger that processing precision of products is influenced by human factor, and the lasso centre symmetry is not high, and lumber recovery and yield rate are not high.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide a kind of and can realize stamped high carbon chromium bearing ring at room temperature, improve the precision of lumber recovery, yield rate and bearing ring, the punching press type high carbon chromium bearing ring and the production technique thereof that reduce production costs.
The objective of the invention is to be achieved through the following technical solutions.This punching press type high carbon chromium bearing ring comprises that the chemical ingredients mass percent is: C:0.95%～1.05%; Mn:0.25%～0.45%; Si:0.15%～0.35%; Cr:1.40%～1.65%; S :≤0.025%; P :≤0.025%; Ni :≤0.25%; Cu :≤0.25%; Surplus is Fe.
As preferably: comprise that also the chemical ingredients mass percent is Als:0.015%～0.040%.
As preferably: by the chemical ingredients mass percent be: C:0.95%～1.00%; Si:0.15%～0.25%; Mn:0.25%～0.40%; Cr:1.40%～1.55%; Als:0.020%～0.035%; S≤0.010%; P≤0.015%; Cu≤0.25%; Ni≤0.25%; Surplus is that Fe forms.
A kind of production technique of punching press type high carbon chromium bearing ring, comprise annealing and cold rolling control, lasso drawing and surface hardening, adopt the two-phase region annealing process that the hot-rolled steel sheet band is carried out Spheroidizing Annealing, promptly be warmed up to 780 ℃ earlier, enter austenite, perlite two-phase region, be incubated 2 hours～4 hours, cool to 700 ℃ with stove again, be not less than insulation in 15 hours.
As preferably: annealing number of times and rolling pass are 2～3 times, and draught is not less than 40%, and the even rank of spherodized structure is at 2～4 grades.
As preferably: control the decarburization of steel plate belt surface in the annealing process by the concentration of adjusting protective atmosphere, decarburized amount is 0.2mm～0.3mm.
As preferably: cold rolling tensile strength 550N/mm
2～700N/mm
2, elongation 〉=30%.
Adopt as preferred: carry out surface hardening with the method for surface cementation or the nitrogen bearing ring after to drawing.
The invention has the beneficial effects as follows: the present invention has produced the high-carbon-chromium bearing steel hot rolled strip that can satisfy punching performance by the control of acid-soluble aluminum content in the steel and inclusion morphology; Again strip is carried out the annealing of multi-pass and cold rolling, produced the cold rolled sheet that spherodized structure is even, toughness is higher; Again hardening treatment is carried out on its surface after the lasso impact briquetting.This production technique economical with materials, production efficiency is higher, and economic worth is remarkable.
Embodiment
Below in conjunction with embodiment the present invention is described further.Though the present invention will be described in conjunction with preferred embodiment, should know, do not represent to limit the invention among the described embodiment.On the contrary, the present invention will be contained alternative, modified version and the equivalent in the scope of the present invention that can be included in attached claims qualification.
Here the punching press type high carbon chromium bearing ring and the production technique thereof of Jie Shaoing generally is used for bearing ring and production technique thereof, yet should know that the present invention also can be used for the production technique of other part.
The production craft step of punching press type high carbon chromium bearing ring of the present invention is as follows:
Starting material design and production → starting material softening annealing → elimination scale on surface → multi-pass annealing and cold rolling → surface finish → drawing → lasso surface hardening → finished product
Key problem in technology point of the present invention is how to prepare the problem of materials that can satisfy the impact briquetting performance, the present invention produces by the composition design and guidance and has obtained hot rolled strip, and adopt the annealing and the cold-rolling process of autonomous design that starting material are handled to improve its toughness, produced cold rolled sheet with excellent toughness, again autonomous design stamping machine and punching press mould, thereby realized the production of punching press profile shaft bearing ring.
Melting chemical composition of the present invention (mass percent %) is: C:0.95%～1.05%; Mn:0.25%～0.45%; Si:0.15%～0.35%; Cr:1.40%～1.65%; S :≤0.025%; P :≤0.025%; Ni :≤0.25%; Cu :≤0.25%; Als:0.015%～0.040%, surplus are Fe.
Production technique of the present invention comprises hot-rolled steel strip composition Design and production, the annealing of strip steel, the control of cold roling reduction, a small amount of decarbonization process of steel plate belt surface, lasso drawing and lasso surface hardening.
Concrete technology controlling and process is as follows:
1. hot-rolled steel strip composition Design and production
By Als content in the control steel 0.015%～0.040%, and the dwindling of inclusion pattern, from the starting material angle design punching press hot-rolled steel strip, for the punching performance raising of back lays a solid foundation.
2. the annealing of strip steel
Adopt the two-phase region annealing process that the hot-rolled steel sheet band is carried out Spheroidizing Annealing, promptly be warmed up to austenite, perlite two-phase region earlier, the insulation certain hour, cool to about 700 ℃ with stove again, long-time insulation, and according to the definite annealing of cold rolling pass number of times, about 3 grades of annealing back spherodized structures.
3. the control of cold roling reduction
According to the product of different size, determine different cold rolling number of times, generally about three times, total reduction is not less than 40%, has guaranteed the performance index of strip.
4. a small amount of decarbonization process of steel plate belt surface
When the impulse bearing lasso; the stress that the outside surface of steel plate band is subjected to is big; for lasso is ftractureed from outside surface; the present invention has adopted unique technology that a small amount of decarburization is carried out on strip steel surface; generally about 0.2mm, promptly when one annealing process, adjust the concentration of protective atmosphere and control decarburized amount.
5. lasso drawing
Autonomous design the punched outer housing machine, adopt certain material to make the punching press mould, guaranteed the quality of punching press style ferrules.
6. lasso surface hardening
Adopt method that the surface oozes C/N that the lasso of moulding is carried out surface hardening, improved the wear resistance of bearing ring.
Table 1 is the chemical ingredients example of three batches of steel grades of the present invention.
Table 1: punching press type high carbon chromium bearing ring steel chemical composition (mass percent, %)
| Batch | C | Si | Mn | S | P | Cr | Ni | Cu | Als |
| 1 | 0.97 | 0.19 | 0.30 | 0.003 | 0.010 | 1.45 | 0.04 | 0.10 | 0.022 |
| 2 | 0.96 | 0.23 | 0.28 | 0.002 | 0.009 | 1.42 | 0.04 | 0.10 | 0.026 |
| 3 | 0.96 | 0.20 | 0.32 | 0.003 | 0.009 | 1.48 | 0.05 | 0.10 | 0.028 |
Table 2 for the used strip steel of the present invention hot-rolled state with cold rolling after tensile strength Rm, yield strength Rp0.2, unit elongation A example (numbering corresponding) with table 1.
Table 2: the punching press type high carbon chromium bearing ring mechanical property of strip steel
The present invention is further described below in conjunction with specific examples:
After preparing the high carbon chromium bearing cold rolled sheet that can satisfy punching performance, utilize press tool to produce in batches and dash the punching press type high carbon chromium bearing ring that is not more than 15mm deeply.
The concrete size of example lasso: towards dark 12mm, wall thickness 2.5mm, a side inner ring diameter 48.5mm, opposite side inner ring diameter 41mm, and have the arc step.
Claims (8)
1. a punching press type high carbon chromium bearing ring is characterized in that: comprise that the chemical ingredients mass percent is: C:0.95%～1.05%; Mn:0.25%～0.45%; Si:0.15%～0.35%; Cr:1.40%～1.65%; S :≤0.025%; P :≤0.025%; Ni :≤0.25%; Cu :≤0.25%; Surplus is Fe.
2. punching press type high carbon chromium bearing ring according to claim 1 is characterized in that: comprise that also the chemical ingredients mass percent is Als:0.015%～0.040%.
3. punching press type high carbon chromium bearing ring according to claim 1 and 2 is characterized in that: by the chemical ingredients mass percent be: C:0.95%～1.00%; Si:0.15%～0.25%; Mn:0.25%～0.40%; Cr:1.40%～1.55%; Als:0.020%～0.035%; S≤0.010%; P≤0.015%; Cu≤0.25%; Ni≤0.25%; Surplus is that Fe forms.
4. technology of producing the high carbon chromium of punching press type according to claim 1 bearing ring, comprise annealing and cold rolling control, lasso drawing and surface hardening, it is characterized in that: adopt the two-phase region annealing process that the hot-rolled steel sheet band is carried out Spheroidizing Annealing, promptly be warmed up to 780 ℃ earlier, enter austenite, perlite two-phase region, be incubated 2 hours～4 hours, cool to 700 ℃ with stove again, be not less than insulation in 15 hours.
5. the production technique of punching press type high carbon chromium bearing ring according to claim 4 is characterized in that: annealing number of times and rolling pass are 2～3 times, and draught is not less than 40%, and the even rank of spherodized structure is at 2～4 grades.
6. the production technique of punching press type high carbon chromium bearing ring according to claim 4 is characterized in that: control the decarburization of steel plate belt surface in the annealing process by the concentration of adjusting protective atmosphere, decarburized amount is 0.2mm～0.3mm.
7. the production technique of punching press type high carbon chromium bearing ring according to claim 4 is characterized in that: cold rolling tensile strength 550N/mm
2～700N/mm
2, elongation 〉=30%.
8. the production technique of punching press type high carbon chromium bearing ring according to claim 4 is characterized in that: the bearing ring of the method that adopts surface cementation or nitrogen after to drawing carries out surface hardening.
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| CN 201010581822 CN102086493A (en) | 2010-11-30 | 2010-11-30 | Stamped high-carbon chromium bearing ring and production process thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345073A (en) * | 2011-11-02 | 2012-02-08 | 成都天马铁路轴承有限公司 | Nitrogen-vanadium-niobium high-carbon chromium bearing steel |
| CN102628096A (en) * | 2012-04-23 | 2012-08-08 | 人本集团有限公司 | Thermal processing process of bearing ring |
| CN103233101A (en) * | 2013-04-08 | 2013-08-07 | 浙江吉利汽车研究院有限公司杭州分公司 | GCr15 bearing steel heat treatment method |
| CN104451461A (en) * | 2014-12-17 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Preparation method of bearing steel strip |
| CN107747034A (en) * | 2017-10-20 | 2018-03-02 | 江阴兴澄特种钢铁有限公司 | A kind of railway truck bearing high-carbon-chromium bearing steel and preparation method thereof |
| 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 |
| CN110153725A (en) * | 2018-02-12 | 2019-08-23 | 周朝辉 | A kind of abrasion-proof pipe preparation system based on high-carbon high-chromium steel |
-
2010
- 2010-11-30 CN CN 201010581822 patent/CN102086493A/en active Pending
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345073A (en) * | 2011-11-02 | 2012-02-08 | 成都天马铁路轴承有限公司 | Nitrogen-vanadium-niobium high-carbon chromium bearing steel |
| CN102345073B (en) * | 2011-11-02 | 2013-06-12 | 成都天马铁路轴承有限公司 | Nitrogen-vanadium-niobium high-carbon chromium bearing steel |
| CN102628096A (en) * | 2012-04-23 | 2012-08-08 | 人本集团有限公司 | Thermal processing process of bearing ring |
| CN103233101A (en) * | 2013-04-08 | 2013-08-07 | 浙江吉利汽车研究院有限公司杭州分公司 | GCr15 bearing steel heat treatment method |
| CN104451461A (en) * | 2014-12-17 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Preparation method of bearing steel strip |
| 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 |
| CN107747034A (en) * | 2017-10-20 | 2018-03-02 | 江阴兴澄特种钢铁有限公司 | A kind of railway truck bearing high-carbon-chromium bearing steel and preparation method thereof |
| CN110153725A (en) * | 2018-02-12 | 2019-08-23 | 周朝辉 | A kind of abrasion-proof pipe preparation system based on high-carbon high-chromium steel |
| 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 |
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Application publication date: 20110608 |