CN105907925A - Heat treatment technology of impact-resistant rolling bearing - Google Patents
Heat treatment technology of impact-resistant rolling bearing Download PDFInfo
- Publication number
- CN105907925A CN105907925A CN201610375460.1A CN201610375460A CN105907925A CN 105907925 A CN105907925 A CN 105907925A CN 201610375460 A CN201610375460 A CN 201610375460A CN 105907925 A CN105907925 A CN 105907925A
- Authority
- CN
- China
- Prior art keywords
- quenching
- heat treatment
- outer ring
- rolling bearing
- technology
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- 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
- C21D2221/00—Treating localised areas of an article
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment technology of an impact-resistant rolling bearing. The heat treatment technology of the rolling bearing is local heat treatment, a heat treatment component is a bearing outer ring, and heat treatment of the bearing outer ring comprises the following steps: quenching, cold treatment and tempering. Compared with the prior art, the heat treatment technology of the impact-resistant rolling bearing has the beneficial effects that the temperature rising speed is controlled strictly in a process of a quenching technology, the temperature rises slowly, so that deformation caused by uneven heating can be avoided, quenching deformation is reduced, size stability is improved, meanwhile, follow-up finishing rate is reduced, production efficiency is improved, the quality of the obtained product is high, the technology is simple, and the cost is low.
Description
Technical field
The present invention relates to technical field of rolling bearings, particularly belong to a kind of impact resistance rolling bearing
Technology for Heating Processing.
Background technology
Bearing is a kind of very important parts in plant equipment in the present age.Its major function is
Support machinery rotary body, in order to reduce equipment mechanical load coefficient of friction in transmission process.
Thermal treatment quality has the most conclusive important impact to the service life of bearing.Roll
Bearing can occur the biggest radial deformation and end face buckling deformation in quenching process, and both becomes
If shape can not be well solved, directly influence the form and position tolerance of product mill processing, make
Become more waste product substandard products.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide the heat of a kind of impact resistance rolling bearing
Process technique.
The technical solution used in the present invention is as follows:
A kind of Technology for Heating Processing of impact resistance rolling bearing, the Technology for Heating Processing of described rolling bearing
For local heat treatmet, heat processing unit is bearing outer ring, described bearing outer ring heat treatment include with
Lower step:
(1) quenching: bearing outer ring in hardening media first with the programming rate of 10-15 DEG C/h
Rise to 680-720 DEG C, and at a temperature of 680-720 DEG C, preheat 10-15min, then with 8-12
DEG C/programming rate of h rises to 835-870 DEG C and carries out quenching and preserving heat, the time of quenching and preserving heat is
35-40min, the most air-cooled to 580-610 DEG C and be incubated 3-4h, cool to the furnace 160 DEG C with
Come out of the stove after Xia air cooling；
(2) cold treatment: described cold treatment step is carried out in household freezer, uses liquid nitrogen conduct
Cooling medium, is cooled to-70 DEG C～-80 DEG C, is incubated 2-3h at such a temperature, then natural
Return and warm to room temperature；
(3) tempering: bearing outer ring is heated to 500-550 DEG C in hot stove, is incubated 40-50min,
Finally naturally cool to room temperature so that bearing outer ring integral hardness reaches HRC 25-40, it is thus achieved that
Tempered sorbite.
Described step (1) quenching Step uses marquench, and Equipment for Heating Processing is roller-bottom type
Cycle Quenching Production Line, hardening media is salt made from earth containing a comparatively high percentage of sodium chloride, and salt made from earth containing a comparatively high percentage of sodium chloride medium temperature is 160-175 DEG C, quenches
Fire process cools down 8-10min in salt made from earth containing a comparatively high percentage of sodium chloride medium.
Described step (1) uses during quenching low frequency vacuum quencher.
Compared with the prior art, beneficial effects of the present invention is as follows: quenching technical process of the present invention
Strictly control programming rate, slowly heat up, can avoid, because heating the uneven deformation caused, subtracting
Few quenching distortion, improves the stability of size, reduces follow-up finishing rate simultaneously, improves and produces effect
Rate, the product quality obtained is high, and technique is simple simultaneously, low cost.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into this
The scope of bright protection.
A kind of Technology for Heating Processing of impact resistance rolling bearing, the Technology for Heating Processing of described rolling bearing
For local heat treatmet, heat processing unit is bearing outer ring, described bearing outer ring heat treatment include with
Lower step:
(1) quenching: bearing outer ring in hardening media first with the programming rate of 10-15 DEG C/h
Rise to 680-720 DEG C, and at a temperature of 680-720 DEG C, preheat 10-15min, then with 8-12
DEG C/programming rate of h rises to 835-870 DEG C and carries out quenching and preserving heat, the time of quenching and preserving heat is
35-40min, the most air-cooled to 580-610 DEG C and be incubated 3-4h, cool to the furnace 160 DEG C with
Come out of the stove after Xia air cooling；
(2) cold treatment: described cold treatment step is carried out in household freezer, uses liquid nitrogen conduct
Cooling medium, is cooled to-70 DEG C～-80 DEG C, is incubated 2-3h at such a temperature, then natural
Return and warm to room temperature；
(3) tempering: bearing outer ring is heated to 500-550 DEG C in hot stove, is incubated 40-50min,
Finally naturally cool to room temperature so that bearing outer ring integral hardness reaches HRC 25-40, it is thus achieved that
Tempered sorbite.
Described step (1) quenching Step uses marquench, and Equipment for Heating Processing is roller-bottom type
Cycle Quenching Production Line, hardening media is salt made from earth containing a comparatively high percentage of sodium chloride, and salt made from earth containing a comparatively high percentage of sodium chloride medium temperature is 160-175 DEG C, quenches
Fire process cools down 8-10min in salt made from earth containing a comparatively high percentage of sodium chloride medium.
Described step (1) uses during quenching low frequency vacuum quencher.
It is obvious to a person skilled in the art that the invention is not restricted to described one exemplary embodiment
Details, and without departing from the spirit or essential characteristics of the present invention, it is possible to it
His concrete form realizes the present invention.Therefore, no matter from the point of view of which point, all should be by embodiment
Regarding exemplary as, and be nonrestrictive, the scope of the present invention is by claims
Rather than described explanation limit, it is intended that by fall claim equivalency implication and
In the range of all changes include in the present invention.Although moreover, it will be appreciated that this specification
It is been described by according to embodiment, but the most each embodiment only comprises an independent technology
Scheme, this narrating mode of description is only for clarity sake, and those skilled in the art should
When using description as an entirety, the technical scheme in each embodiment can also be through suitable group
Close, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a Technology for Heating Processing for impact resistance rolling bearing, the heat treatment of described rolling bearing
Technique is local heat treatmet, and heat processing unit is bearing outer ring, it is characterised in that described bearing
Outer ring heat treatment comprises the following steps:
(1) quenching: bearing outer ring in hardening media first with the programming rate of 10-15 DEG C/h
Rise to 680-720 DEG C, and at a temperature of 680-720 DEG C, preheat 10-15min, then with 8-12
DEG C/programming rate of h rises to 835-870 DEG C and carries out quenching and preserving heat, the time of quenching and preserving heat is
35-40min, the most air-cooled to 580-610 DEG C and be incubated 3-4h, cool to the furnace 160 DEG C with
Come out of the stove after Xia air cooling；
(2) cold treatment: described cold treatment step is carried out in household freezer, uses liquid nitrogen conduct
Cooling medium, is cooled to-70 DEG C～-80 DEG C, is incubated 2-3h at such a temperature, then natural
Return and warm to room temperature；
(3) tempering: bearing outer ring is heated to 500-550 DEG C in hot stove, is incubated 40-50min,
Finally naturally cool to room temperature so that bearing outer ring integral hardness reaches HRC 25-40, it is thus achieved that
Tempered sorbite.
The Technology for Heating Processing of a kind of impact resistance rolling bearing the most according to claim 1,
It is characterized in that: described step (1) quenching Step uses marquench, Equipment for Heating Processing
For roller-bottom type cycle Quenching Production Line, hardening media is salt made from earth containing a comparatively high percentage of sodium chloride, and salt made from earth containing a comparatively high percentage of sodium chloride medium temperature is 160-175
DEG C, quenching process cools down 8-10min in salt made from earth containing a comparatively high percentage of sodium chloride medium.
The Technology for Heating Processing of a kind of impact resistance rolling bearing the most according to claim 1,
It is characterized in that: described step (1) uses during quenching low frequency vacuum quencher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375460.1A CN105907925A (en) | 2016-05-31 | 2016-05-31 | Heat treatment technology of impact-resistant rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375460.1A CN105907925A (en) | 2016-05-31 | 2016-05-31 | Heat treatment technology of impact-resistant rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105907925A true CN105907925A (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610375460.1A Pending CN105907925A (en) | 2016-05-31 | 2016-05-31 | Heat treatment technology of impact-resistant rolling bearing |
Country Status (1)
| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| US20140212082A1 (en) * | 2013-01-28 | 2014-07-31 | Aktiebolaget Skf | Rolling-element bearing and method of manufacturing thereof |
| CN104099460A (en) * | 2014-07-28 | 2014-10-15 | 新昌县南明街道锦泰机械厂 | Heat treatment process for outer ring of rolling bearing |
| CN105316455A (en) * | 2015-12-15 | 2016-02-10 | 常熟市常轴轴承有限公司 | Ultralight bearing heat treatment process |
-
2016
- 2016-05-31 CN CN201610375460.1A patent/CN105907925A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| US20140212082A1 (en) * | 2013-01-28 | 2014-07-31 | Aktiebolaget Skf | Rolling-element bearing and method of manufacturing thereof |
| CN104099460A (en) * | 2014-07-28 | 2014-10-15 | 新昌县南明街道锦泰机械厂 | Heat treatment process for outer ring of rolling bearing |
| CN105316455A (en) * | 2015-12-15 | 2016-02-10 | 常熟市常轴轴承有限公司 | Ultralight bearing heat treatment process |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160831 |
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