CN108103292A - A kind of leading screw heat treatment process - Google Patents
A kind of leading screw heat treatment process Download PDFInfo
- Publication number
- CN108103292A CN108103292A CN201711480750.3A CN201711480750A CN108103292A CN 108103292 A CN108103292 A CN 108103292A CN 201711480750 A CN201711480750 A CN 201711480750A CN 108103292 A CN108103292 A CN 108103292A
- Authority
- CN
- China
- Prior art keywords
- leading screw
- spheroidizing
- heat treatment
- treatment process
- normalizing
- Prior art date
- 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.)
- Withdrawn
Links
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
Landscapes
- 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 present invention relates to lead screw machining technical fields, disclose a kind of leading screw heat treatment process technique and include the following steps：Leading screw is vertically placed in stove simultaneously normalizing by S1, normalizing；S2, high tempering carry out high tempering to the leading screw after normalizing；S3, spheroidizing, by the leading screw spheroidizing after high tempering to eliminate cementite；S4, harden；S5, lonneal carry out lonneal so that cementite is precipitated to leading screw.Normalized treatment can improve steel tissue, improve the comprehensive mechanical performance of leading screw；High tempering can improve the processing performance of leading screw；Spheroidizing eliminates the cementite of net distribution after normalizing；The intensity and hardness of leading screw can be increased substantially by hardening；Lonneal cementite is in granular form precipitation, and leading screw is made to have excellent abrasive resistance and toughness.
Description
Technical field
The present invention relates to lead screw machining technical field more particularly to a kind of leading screw heat treatment process.
Background technology
Leading screw is that rotary motion is converted into the preferable production to move along a straight line or by transform linear motion for rotary motion
Product.Leading screw is actuated element most-often used on machine tool and precision optical machinery, and major function is to convert rotational motion to
Torque is converted into axial repeated action power by linear movement, while has both high-precision, invertibity and efficient feature.By
In the frictional resistance with very little, leading screw is widely used in various industrial equipments and precision instrument.
Leading screw needs to bear high torque using process, and can generate friction with ball or nut, therefore to leading screw
Tensile strength, compression strength, torsional strength and hardness etc. have higher requirement.Although it is selected as far as possible with following in selection
Feature：With excellent processing performance, when grinding, is not likely to produce crackle, can obtain good surface smoothness and smaller remnants
Internal stress, Cutter wear effect are smaller；Ultimate tensile intensity is generally not less than 588MPa；Material hardness is uniform, metallographic structure
It complies with standard.
But the leading screw processed is in use, the contact surface and tooth of leading screw and nut are prone to wear out, serious shadow
Ring the service life of leading screw；Tooth is easily broken off when furthermore leading screw encounters larger resistance.
The content of the invention
It is an object of the invention to propose a kind of leading screw heat treatment process, it can make leading screw that there is higher intensity and hard
Degree, to improve the service life of leading screw.
For this purpose, the present invention uses following technical scheme：
A kind of leading screw heat treatment process, includes the following steps：
Leading screw is vertically placed in stove simultaneously normalizing by S1, normalizing；
S2, high tempering carry out high tempering to the leading screw after normalizing；
S3, spheroidizing, by the leading screw spheroidizing after high tempering to eliminate cementite；
S4, harden；
S5, lonneal carry out lonneal so that cementite is precipitated to leading screw.
Normalized treatment can improve steel tissue, improve the comprehensive mechanical performance of leading screw；High tempering can improve leading screw
Processing performance；Spheroidizing eliminates the cementite of net distribution after normalizing；Harden can increase substantially leading screw intensity and
Hardness；Lonneal cementite is in granular form precipitation, and leading screw is made to have excellent abrasive resistance and toughness.
Preferably, the normalizing procedure is：Leading screw is heated to Ac in stove3+ 60~80 DEG C, and 3~6h is kept the temperature, then
It is quick air-cooled.Heating temperature is chosen as any number in Ac3+60 DEG C, Ac3+65 DEG C, Ac3+70 DEG C, Ac3+75 DEG C, Ac3+80 DEG C
Value, heat preservation duration are chosen as 3h, 4h, 5h, any value in 6h.
Preferably, the high tempering process is：Leading screw after normalizing is kept the temperature 2.5 at 600~660 DEG C of in-furnace temperature
~4.5h.In-furnace temperature is chosen as in 600 DEG C, 610 DEG C, 620 DEG C, 625 DEG C, 630 DEG C, 640 DEG C, 648 DEG C, 652 DEG C, 660 DEG C
Any value, heat preservation duration are chosen as 2.5h, 3h, 3.2h, 3.8h, 4h, any value in 4.3h, 4.5h.
Preferably, the spheroidizing is isothermal spheroidizing or low temperature spheroidizing；
The isothermal spheroidizing process is：By the leading screw after high tempering 830~850 DEG C in stove (such as 830 DEG C,
835 DEG C, 838 DEG C, 840 DEG C, 843 DEG C, 845 DEG C, 850 DEG C etc.) under keep the temperature 2.5~5h (such as 2.5h, 3h, 3.2h, 3.8h, 4h,
4.3h, 4.5h, 5h etc.), be furnace-cooled to 690~715 DEG C (such as 690 DEG C, 695 DEG C, 698 DEG C, 700 DEG C, 705 DEG C, 740 DEG C, 715
DEG C etc.), 5~9h of heat preservation (such as 5h, 5.3h, 5.8h, 6h, 6.5h, 7h, 7.5h, 8h, 8.5h, 9h etc.), then furnace cooling is extremely
500 DEG C (such as 495 DEG C, 490 DEG C, 480 DEG C, 470 DEG C etc.) carry out air-cooled below；
The low temperature spheroidizing process is：By the leading screw after high tempering 685~720 DEG C in stove (such as 685 DEG C,
690 DEG C, 695 DEG C, 698 DEG C, 700 DEG C, 705 DEG C, 740 DEG C, 715 DEG C, 720 DEG C etc.) under keep the temperature 6~10h (such as 6h, 6.5h,
7h, 7.5h, 8h, 8.5h, 9h, 9.5h, 9.8h, 10h etc.), rear furnace cooling to 500 DEG C (such as 495 DEG C, 490 DEG C, 480 DEG C,
470 DEG C etc.) it is air-cooled below.
Preferably, the process of hardening is：Leading screw after spheroidizing is subjected to 5~6h of carburizing at 920~950 DEG C,
Then it is cooled to 800~815 DEG C of progress oil quenchings in advance.Carburizing temperature be 920 DEG C, 925 DEG C, 928 DEG C, 932 DEG C, 935 DEG C, 940 DEG C,
Any value in 950 DEG C；A length of 5h during carburizing, 5.2h, 5.5h, any value in 5.8h, 6h；Precooling temperature be 800 DEG C, 806
DEG C, any value in 810 DEG C, 813 DEG C, 815 DEG C.
Preferably, the lonneal process is：Leading screw after hardening keeps 2~4h in in-furnace temperature for 200 ± 10 DEG C.
A length of 2h during heat preservation, 2.5h, 3h, 3.3h, 3.8h, any value in 4h.
Preferably, cold treatment is further included, leading screw keeps more than 3h after hardening at -60 DEG C.It is a length of during holding
Any value in 3.5h, 4h, 4.8h, 5.5h, 6h.
Preferably, high tempering in-furnace temperature is 650 DEG C.
Preferably, a length of 5.5h during the carburizing.
Preferably, a length of 6h during the cold treatment.
Beneficial effects of the present invention are：Normalized treatment can improve steel tissue, improve the comprehensive mechanical performance of leading screw；It is high
Temperature tempering can improve the processing performance of leading screw；Spheroidizing eliminates the cementite of net distribution after normalizing；Hardening can be significantly
Degree improves the intensity and hardness of leading screw；Lonneal cementite is in granular form precipitation, and leading screw is made to have excellent abrasive resistance and toughness.
Specific embodiment
The technical solution further illustrated the present invention below by specific embodiment.
Embodiment 1
The invention discloses a kind of leading screw heat treatment process, include the following steps：
Normalizing：Leading screw is heated to Ac being vertically placed in stove3+ 60, and 6h is kept the temperature, it is then quick air-cooled.
High tempering：Leading screw after normalizing is kept the temperature into 4.5h at 650 DEG C of in-furnace temperature.
Spheroidizing, eliminates cementite, and isothermal spheroidizing process is：By the leading screw after high tempering 830 DEG C in stove
Lower heat preservation 5h, is furnace-cooled at 690 DEG C, keep the temperature 9h, then furnace cooling to 495 DEG C (carry out it is air-cooled；
It hardens：Leading screw after spheroidizing at 920 DEG C is subjected to carburizing 5h, is then cooled to 800 DEG C of progress oil quenchings in advance.
Cold treatment：Leading screw keeps 6h after hardening at -60 DEG C.
Lonneal：Leading screw is 200 ± 10 DEG C of holding 2h in in-furnace temperature, and cementite is precipitated.
Normalized treatment can improve steel tissue, improve the comprehensive mechanical performance of leading screw；High tempering can improve leading screw
Processing performance；Spheroidizing eliminates the cementite of net distribution after normalizing；Harden can increase substantially leading screw intensity and
Hardness；Lonneal cementite is in granular form precipitation, and leading screw is made to have excellent abrasive resistance and toughness.
Embodiment 2
The invention discloses a kind of leading screw heat treatment process, include the following steps：
Normalizing：Leading screw is heated to Ac being vertically placed in stove3+ 60, and 6h is kept the temperature, it is then quick air-cooled.
High tempering：Leading screw after normalizing is kept the temperature into 4.5h at 650 DEG C of in-furnace temperature.
Spheroidizing, eliminates cementite, and isothermal spheroidizing process is：By the leading screw after high tempering 700 DEG C in stove
Lower heat preservation 10h, then furnace cooling to 500 DEG C (carry out it is air-cooled；
It hardens：Leading screw after spheroidizing at 920 DEG C is subjected to carburizing 5h, is then cooled to 800 DEG C of progress oil quenchings in advance.
Cold treatment：Leading screw keeps 6h after hardening at -60 DEG C.
Lonneal：Leading screw is 200 ± 10 DEG C of holding 2h in in-furnace temperature, and cementite is precipitated.
Applicant states that the present invention has carried out illustrative description by above-described embodiment, it is clear that present invention specific implementation
It is not subject to the restrictions described above, as long as employing changing for the various unsubstantialities of design and the technical solution progress of the present invention
Into or it is not improved the design of the present invention and technical solution are directly applied into other occasions, the equal protection models in the present invention
Within enclosing.
Claims (10)
1. a kind of leading screw heat treatment process, which is characterized in that include the following steps：
Leading screw is vertically placed in stove simultaneously normalizing by S1, normalizing；
S2, high tempering carry out high tempering to the leading screw after normalizing；
S3, spheroidizing, by the leading screw spheroidizing after high tempering to eliminate cementite；
S4, harden；
S5, lonneal carry out lonneal so that cementite is precipitated to leading screw.
2. leading screw heat treatment process according to claim 1, which is characterized in that the normalizing procedure is：By leading screw in stove
Inside it is heated to Ac3+ 60~80 DEG C, and 3~6h is kept the temperature, it is then quick air-cooled.
3. leading screw heat treatment process according to claim 1, which is characterized in that the high tempering process is：By normalizing
Leading screw afterwards keeps the temperature 2.5~4.5h at 600~660 DEG C of in-furnace temperature.
4. leading screw heat treatment process according to claim 1, which is characterized in that the spheroidizing is isothermal spheroidizing
Or low temperature spheroidizing；
The isothermal spheroidizing process is：Leading screw after high tempering is kept the temperature to 2.5~5h, stove in stove at 830~850 DEG C
Be cooled to 690~715 DEG C, keep the temperature 5~9h, then furnace cooling carried out to less than 500 DEG C it is air-cooled；
The low temperature spheroidizing process is：Leading screw after high tempering is kept the temperature to 6~10h in stove at 685~720 DEG C, after
Furnace cooling to less than 500 DEG C it is air-cooled.
5. leading screw heat treatment process according to claim 1, which is characterized in that the process of hardening is：By spheroidizing
Leading screw afterwards carries out 5~6h of carburizing at 920~950 DEG C, is then cooled to 800~815 DEG C of progress oil quenchings in advance.
6. leading screw heat treatment process according to claim 1, which is characterized in that the lonneal process is：After hardening
Leading screw in-furnace temperature for 200 ± 10 DEG C holding 2~4h.
7. leading screw heat treatment process according to claim 1, which is characterized in that further include cold treatment, leading screw is hardening it
Afterwards, more than 3h is kept at -60 DEG C.
8. leading screw heat treatment process according to claim 3, which is characterized in that high tempering in-furnace temperature is 650 DEG C.
9. leading screw heat treatment process according to claim 5, which is characterized in that a length of 5.5h during the carburizing.
10. leading screw heat treatment process according to claim 7, which is characterized in that a length of 6h during the cold treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480750.3A CN108103292A (en) | 2017-12-29 | 2017-12-29 | A kind of leading screw heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480750.3A CN108103292A (en) | 2017-12-29 | 2017-12-29 | A kind of leading screw heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108103292A true CN108103292A (en) | 2018-06-01 |
Family
ID=62215010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711480750.3A Withdrawn CN108103292A (en) | 2017-12-29 | 2017-12-29 | A kind of leading screw heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108103292A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724786A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Bearing steel and technology for heating processing |
| CN104057267A (en) * | 2014-06-26 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Manufacturing process of CrWMn steel gear milling lathe lead screw |
| CN104372148A (en) * | 2014-11-06 | 2015-02-25 | 无锡市百顺机械厂 | Heat treatment process of bearing steel |
| CN104959791A (en) * | 2015-07-07 | 2015-10-07 | 成都亨通兆业精密机械有限公司 | Precise lead screw machining technology |
| CN105583588A (en) * | 2016-03-24 | 2016-05-18 | 哈尔滨汽车轴承有限公司 | Machining method for inner ring and outer ring of conical roller bearing |
-
2017
- 2017-12-29 CN CN201711480750.3A patent/CN108103292A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724786A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Bearing steel and technology for heating processing |
| CN104057267A (en) * | 2014-06-26 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Manufacturing process of CrWMn steel gear milling lathe lead screw |
| CN104372148A (en) * | 2014-11-06 | 2015-02-25 | 无锡市百顺机械厂 | Heat treatment process of bearing steel |
| CN104959791A (en) * | 2015-07-07 | 2015-10-07 | 成都亨通兆业精密机械有限公司 | Precise lead screw machining technology |
| CN105583588A (en) * | 2016-03-24 | 2016-05-18 | 哈尔滨汽车轴承有限公司 | Machining method for inner ring and outer ring of conical roller bearing |
Non-Patent Citations (1)
| Title |
|---|
| 焦玉: "浅谈减少 CrWMn 芯轴热处理畸变的工艺措施", 《企业导报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104439994B (en) | Manufacturing method for automobile transmission gear | |
| CN105643218A (en) | Machining method of gear parts of gearbox | |
| CN103602797B (en) | High rigidity steel wire cut pill thermal treatment process | |
| CN102803522A (en) | Method for producing harmonic drive gear base material | |
| CN102618817A (en) | Process for machining parts of automobile gear box by using 20CrMnTi steel | |
| CN102859023A (en) | Steel for high frequency hardening, roughly molded material for high frequency hardening and process for production thereof, and high-frequency-hardened steel member | |
| WO2022121565A1 (en) | High-frequency induction-based local tempering heat treatment method for high-nitrogen stainless bearing steel | |
| CN103132086A (en) | Novel carburizing-constant temperature-quenching process for heavy-duty gears | |
| CN102494106A (en) | Process for manufacturing 20 CrMo carburizing steel gear | |
| CN106312479A (en) | Internal spline sleeve machining technology | |
| CN105689969A (en) | Guide post processing technology | |
| CN102676942A (en) | Thermal processing technology for petroleum drilling tool material | |
| CN108220575B (en) | Laser strengthening process for shaft workpiece | |
| CN103590050A (en) | Carburizing and quenching method for worm part | |
| CN108103292A (en) | A kind of leading screw heat treatment process | |
| CN109628726A (en) | A kind of heat treatment process of gear | |
| CN108220759A (en) | A kind of high nickel cast iron alloy backplate | |
| CN103215427A (en) | Heat treatment process of gauge block made of bearing steel | |
| CN104328250A (en) | Heat treatment process of bearing steel | |
| CN102329940A (en) | Thermal treatment process for plunger of axial plunger pump | |
| CN104831023A (en) | Thermal treatment technology for ball screws of machine tool | |
| CN109402350A (en) | A kind of heat treatment process of steel | |
| CN105695701A (en) | 40Cr quenching and tempering technology | |
| CN103343213A (en) | Heat treatment method for thin-walled gear ring | |
| CN207642960U (en) | A kind of hand-operated tools |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180601 |
|
| WW01 | Invention patent application withdrawn after publication |