CN106319186B - A kind of 45 steel roller axis high temperature, short time Q-tempering techniques - Google Patents
A kind of 45 steel roller axis high temperature, short time Q-tempering techniques Download PDFInfo
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- CN106319186B CN106319186B CN201610851456.8A CN201610851456A CN106319186B CN 106319186 B CN106319186 B CN 106319186B CN 201610851456 A CN201610851456 A CN 201610851456A CN 106319186 B CN106319186 B CN 106319186B
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- temperature
- short time
- roller axis
- steel roller
- stove
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Classifications
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- 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
Abstract
The present invention relates to a kind of 45 steel roller axis high temperature, short time Q-tempering techniques, will be rough turn after 45 steel roller axis be packed into the stove of furnace temperature≤300 DEG C, be warming up to 800 ± 10 DEG C, after keeping the temperature 0.5h, be rapidly heated to 900 ± 10 DEG C of isothermal treatment for short time, hardening；45 steel roller axis are entered into stove, 0.5h is kept the temperature at 300 ± 10 DEG C, are warming up to 520 ± 10 DEG C, after keeping the temperature 1.0h, air-cooled cooling.The roller shaft handled by high temperature, short time Q-tempering of the present invention, its body surface hardness 240-250HB, phenomena such as being tempered rear surface color uniformity with the roller shaft that stove is handled, do not find the hickie generated because quenching inhomogeneous cooling is even, ontology hardness deviation controls within 30HB.
Description
Technical field
The invention belongs to roller shaft technical field of heat treatment, and in particular to a kind of 45 steel roller axis high temperature, short time Q-temperings
Technique.
Background technology
45 steel roller axis are a kind of parts of appliance that size is smaller（As shown in Figure of description Fig. 1）, technology require be
Modifier treatment 220-250HB.Its general heat treatment process parameter is：830-850 DEG C of austenitizing, hardening, 500-540 DEG C is returned
Fire.
The smaller workpiece of this specification, when being heat-treated using common electric furnace, body temperature suppression ratio after coming out of the stove
Comparatively fast, modifier treatment is carried out using above-mentioned heat treatment process, is susceptible to quench and not get angry, workpiece surface hardness dispersion is bigger
The problems such as.
In order to ensure the quality of roller shaft modifier treatment, the performance of workpiece is improved, needs to research and develop a kind of 45 new steel
Roller shaft heat treatment process.
Invention content
In order to solve the above technical problem, the present invention provides a kind of 45 steel roller axis high temperature, short time Q-tempering techniques.
By the roller shaft that high temperature, short time Q-tempering of the present invention is handled, body surface hardness 240-250HB, with the idler wheel of stove processing
Axis be tempered rear surface color uniformity, do not find because quench inhomogeneous cooling it is even due to generate hickie phenomena such as, ontology hardness
Deviation controls within 30HB.
The present invention is realized by following technical solutions：
A kind of 45 steel roller axis high temperature, short time Q-tempering techniques, include the following steps successively：
（1）45 steel roller axis after will be rough turn are packed into the stove of furnace temperature≤300 DEG C；
（2）800 ± 10 DEG C are warming up to, after keeping the temperature 0.5h, is rapidly heated to 900 ± 10 DEG C of isothermal treatment for short time, hardening；
（3）45 steel roller axis are entered into stove, 0.5h is kept the temperature at 300 ± 10 DEG C, are warming up to 520 ± 10 DEG C, after keeping the temperature 1.0h,
Air-cooled cooling.
Step（2）In, it is warming up to 800 ± 10 DEG C with the heating rate of≤120 DEG C/h.
Step（2）In, it is rapidly heated to 900 ± 10 DEG C with total power.
Step（2）In, it is rapidly heated to 900 ± 10 DEG C of heat preservation 10min.
Step（2）In, hardening is specially：It is transferred quickly to after coming out of the stove above quenching sink, transfer time controls 60
Within second, enter water cooling rapidly 3 minutes, until surface cooling is to 230 DEG C or so.
The beneficial effects of the present invention are：
1, in 45 steel roller axis Quench heating, 800 DEG C of isothermals are set, on the one hand reduce workpiece low temperature heating rate, drop
Low workpiece thermal stress, on the other hand, which is located at 45 steel Ac3 points or more, it can be ensured that roller shaft complete austenitizing, to
Ensure the quenching effect of roller shaft；
2, the heating temperature of roller shaft is improved to 900 DEG C.900 DEG C are warming up to from 800 DEG C, is quickly risen using total power
On the one hand temperature improves production efficiency, accelerate heating rate, and on the other hand, at a temperature of this, the austenite grain of 45 steel will not be quick
It grows up, while improving 45 steel roller axis austenitizing temperature, using isothermal treatment for short time（10 minutes）, to avoid workpiece from going out
Cool down after stove too fast, causes to quench and not get angry；
By the roller shaft that high temperature, short time Q-tempering of the present invention is handled, body surface hardness 240-250HB, at stove
The roller shaft of reason is tempered rear surface color uniformity, do not find because quench inhomogeneous cooling it is even due to generate hickie phenomena such as,
Ontology hardness deviation controls within 30HB.
Description of the drawings：
Fig. 1 show 45 steel roller axle construction and scale diagrams（Unit：mm）；
Fig. 2 show heat treatment process figure of the present invention.
Specific implementation mode
The present invention is further described with reference to specific embodiment, so that those skilled in the art knows more about
The present invention, but be not intended to limit the present invention.
Embodiment 1
A kind of 45 steel roller axis high temperature, short time Q-tempering techniques, include the following steps successively：
（1）45 steel roller axis after will be rough turn are packed into the stove of furnace temperature≤300 DEG C；
（2）Be warming up to 800 ± 10 DEG C with the heating rate of≤120 DEG C/h, after keeping the temperature 0.5h, with total power be rapidly heated to
900 ± 10 DEG C of heat preservation 10min, are transferred quickly to above quenching sink, transfer time controlled within 60 seconds, rapidly after coming out of the stove
Enter water cooling 3 minutes, until surface cooling is to 230 DEG C or so；
（3）45 steel roller axis are entered into stove, 0.5h is kept the temperature at 300 ± 10 DEG C, are warming up to 520 ± 10 DEG C, after keeping the temperature 1.0h,
Air-cooled cooling.
By the roller shaft that above-mentioned high temperature, short time Q-tempering is handled, body surface hardness 240-250HB, with stove processing
Roller shaft be tempered rear surface color uniformity, do not find because quench inhomogeneous cooling it is even due to generates hickie phenomena such as,
Body hardness deviation controls within 30HB.The results are shown in Table 1 for body sampling mechanics properties testing.
1 high temperature, short time Q-tempering of table handles the ontology mechanical property of rear roller axis
| Serial number | Technique | ReL（MPa） | Rm（MPa） | A（%） | Z（%） |
| 1 | Common tempering | 351 | 641 | 25.5 | 47.0 |
| 2 | High temperature, short time Q-tempering | 520 | 803 | 26.5 | 59.0 |
As it can be seen from table 1 using the roller shaft of high temperature, short time Q-tempering process, tension is strong in bulk properties
Degree Rm improves 25%, and yield strength improves 48%, meanwhile, elongation percentage and the contraction percentage of area do not reduce not only, instead
It improves.
Claims (1)
1. a kind of 45 steel roller axis high temperature, short time Q-tempering techniques, which is characterized in that include the following steps successively：
（1）45 steel roller axis after will be rough turn are packed into the stove of furnace temperature≤300 DEG C；
（2）800 ± 10 DEG C are warming up to the heating rate of≤120 DEG C/h, after keeping the temperature 0.5h, is rapidly heated to 900 with total power
± 10 DEG C of isothermal treatment for short time 10min, hardening；
（3）45 steel roller axis are entered into stove, 0.5h is kept the temperature at 300 ± 10 DEG C, are warming up to 520 ± 10 DEG C, it is air-cooled after keeping the temperature 1.0h
Cooling；
Hardening is specially：It is transferred quickly to after coming out of the stove above quenching sink, transfer time controlled within 60 seconds, entered water rapidly
It is 3 minutes cooling, until surface cooling is to 230 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851456.8A CN106319186B (en) | 2016-09-27 | 2016-09-27 | A kind of 45 steel roller axis high temperature, short time Q-tempering techniques |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851456.8A CN106319186B (en) | 2016-09-27 | 2016-09-27 | A kind of 45 steel roller axis high temperature, short time Q-tempering techniques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106319186A CN106319186A (en) | 2017-01-11 |
| CN106319186B true CN106319186B (en) | 2018-11-06 |
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| CN201610851456.8A Active CN106319186B (en) | 2016-09-27 | 2016-09-27 | A kind of 45 steel roller axis high temperature, short time Q-tempering techniques |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107723418A (en) * | 2017-11-06 | 2018-02-23 | 贵州航天新力铸锻有限责任公司 | A kind of heat treatment method of 45# material bars forging comprehensive mechanical property |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481780A (en) * | 2008-12-06 | 2009-07-15 | 燕山大学 | Easy-to-weld superfine austenite crystal steel with superhigh intensity and high tenacity and manufacturing method thereof |
| CN104946858A (en) * | 2015-07-29 | 2015-09-30 | 山东伊莱特重工有限公司 | High-temperature short-time heating surface strengthening processing process |
-
2016
- 2016-09-27 CN CN201610851456.8A patent/CN106319186B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481780A (en) * | 2008-12-06 | 2009-07-15 | 燕山大学 | Easy-to-weld superfine austenite crystal steel with superhigh intensity and high tenacity and manufacturing method thereof |
| CN104946858A (en) * | 2015-07-29 | 2015-09-30 | 山东伊莱特重工有限公司 | High-temperature short-time heating surface strengthening processing process |
Non-Patent Citations (1)
| Title |
|---|
| 砂轮修整器滚轮轴开裂原因分析及防止;蔡唯佳等;《新技术新工艺·实用技术与工艺装备》;20081231(第5期);第50-52页 * |
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| CN106319186A (en) | 2017-01-11 |
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Address after: No. 9001, Zhangqiu Ji Wang Road, Ji'nan, Shandong Province Patentee after: Elite Energy Equipment Co., Ltd. Address before: No. 9001, Zhangqiu Ji Wang Road, Ji'nan, Shandong Province Patentee before: SHANDONG IRAETA HEAVY INDUSTRY CO., LTD. |