CN108817569A - The Screw thread process method of high-hardness - Google Patents
The Screw thread process method of high-hardness Download PDFInfo
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- CN108817569A CN108817569A CN201810784342.5A CN201810784342A CN108817569A CN 108817569 A CN108817569 A CN 108817569A CN 201810784342 A CN201810784342 A CN 201810784342A CN 108817569 A CN108817569 A CN 108817569A
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- hardness
- screw thread
- thread process
- process method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
-
- 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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- 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)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of Screw thread process methods of high-hardness, include the following steps：Step 1：Intermittent annealing is carried out to the threaded portion to be processed of the high-hardness；Step 2：Screw thread process is carried out by be processed threaded portion of the roller cutter to the high-hardness；Step 3：The threaded portion of the high-hardness is quenched；Step 4：It is cooling.The present invention has at least the following advantages：The hardness of high hardness material can be effectively reduced in processing, and restore the hardness of high hardness material after processing is completed.
Description
Technical field
The present invention relates to technology field more particularly to a kind of Screw thread process methods of high-hardness.
Background technique
Screw thread refers to the spiral yarn shaped continuous protrusion with particular cross section produced on cylinder or element of cone surface
Part.Screw thread is divided into cylindrical thread and tapered tread by its parent shape；It is divided into external screw thread, interior spiral shell in parent present position by it
Line is divided into triangle thread, rectangular thread, trapezoidal thread, saw-tooth thread and other special shape screw threads by its cross sectional shape.
It is 17-4PH H900 for material, during carrying out rolled thread on it, very fast, the original of idler wheel loss
Material hardness because being H900 state is higher, generallys use hardness and carries out adding firmly to it higher than the cutter of the material hardness of H900 state
Work, difficulty of processing is very high, unavoidably will appear cutter idler wheel and fast problem is lost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Screw thread process methods of high-hardness, can process
When the hardness of high hardness material is effectively reduced, and restore the hardness of high hardness material after processing is completed.
In order to solve the above-mentioned technical problems, the present invention provides a kind of Screw thread process method of high-hardness, features
It is, includes the following steps：
Step 1：Intermittent annealing is carried out to the threaded portion to be processed of the high-hardness；
Step 2：Screw thread process is carried out by be processed threaded portion of the roller cutter to the high-hardness；
Step 3：The threaded portion of the high-hardness is quenched；
Step 4：It is cooling.
Further, following steps are specifically included in the step 1：
Step 11：With temperature T1DEG C heating t1Hour, wherein 820≤T1≤ 830,0.5≤t1≤1；
Step 12：Pause t2Minute, wherein 1≤t2≤5；
Step 13：With temperature T2DEG C heating t3Hour, wherein 830≤T2≤ 840,0.5≤t3≤1；
Step 14：Pause t4Minute, wherein 5≤t4≤15；
Step 15：With temperature T3DEG C heating t5Hour, wherein 720≤T3≤ 740,0.5≤t3≤0.8。
Further, the cooling step in the step 4 includes that furnace is cold or air-cooled.
Further, the cooling step in the step 4 includes heat preservation Slow cooling.
Further, the high-hardness includes 0Cr17Ni4Cu4Nb.
Further, the step 11 and step 13 are all made of vacuum drying oven and heat to the high-hardness.
It further, further include being processed by shot blasting to the high-hardness between step 3 and step 4.
It further, further include that ageing treatment is carried out to the high-hardness after step 4.
Further, the ageing treatment includes：With temperature T4DEG C heating t6Hour, wherein 470≤T4≤ 490,3.5≤
t6≤4.5。
By above-mentioned technical solution, the present invention has at least the following advantages：
1, by first taking annealing process, it can preferably soften the tissue of high hard material, reduce its hardness, Jin Erbao
Card preferably can process required screw thread in high hard material using cutter, after take quenching technical again, can effectively increase
Strong high hard material hardness, process optimization；
2, it by intermittent heating, allows the outside heat of high hard material to be gradually introduced the inside of high hard material, avoids
Microgroove caused by excessive temperature differentials, the heating method being gradually incremented by by temperature allow the high hard material to be gradually warmed up, and are heated equal
It is even.
Detailed description of the invention
Fig. 1 is overall structure flow chart of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in connection with fig. 1, the invention discloses a kind of Screw thread process method of high-hardness, include the following steps：Step
Rapid 1：Intermittent annealing is carried out to the threaded portion to be processed of the high-hardness；By roller cutter to the high rigidity
The threaded portion to be processed of material carries out screw thread process；The threaded portion of the high-hardness is quenched；It is cooling.
Embodiment one,
The high-hardness chooses 0Cr17Ni4Cu4Nb, includes the following steps：
Step 1：Including：Step 11, with temperature T1DEG C heating t1Hour, wherein 820≤T1≤ 830,0.5≤t1≤1；This
In embodiment, T is chosen1It is 825 DEG C, chooses t1It is 0.7 hour；
Step 12：Pause t2Minute, wherein 1≤t2≤5；In the present embodiment, t is chosen2It is 3 minutes；
Step 13：With temperature T2DEG C heating t3Hour, wherein 830≤T2≤ 840,0.5≤t3≤1；In the present embodiment, choosing
Take T2It is 835 DEG C, chooses t3It is 0.8 hour；At this point, the hardness requirement of the 0Cr17Ni4Cu4Nb is 28-29HRC；
Step 14：Pause t4Minute, wherein 5≤t4≤15；In the present embodiment, t is chosen4It is 10 minutes；
Step 15：With temperature T3DEG C heating t5Hour, wherein 720≤T3≤ 740,0.5≤t3≤0.8；In the present embodiment,
Choose T3It is 730 DEG C, chooses t5It is 0.65 hour, at this point, the hardness requirement of the 0Cr17Ni4Cu4Nb is 28-31HRC.
Step 2：Screw thread process is carried out by be processed threaded portion of the roller cutter to the high-hardness.
Step 3：The threaded portion of the high-hardness is quenched.
Step 4：It is cooling, in the present embodiment, take furnace cold or air-cooled.
Ageing treatment is carried out to the 0Cr17Ni4Cu4Nb after cooling, including with temperature T4DEG C heating t6Hour, wherein
470≤T4≤ 490,3.5≤t6≤4.5；In the present embodiment, T is chosen4It is 480 DEG C, chooses t5It is 4 hours；At this point, described
The hardness requirement of 0Cr17Ni4Cu4Nb is 40-41HRC.
By above-mentioned set-up mode, have the following advantages that：First point：It, can be preferably by first taking annealing process
The tissue for softening high hard material reduces its hardness, and then guarantees preferably process in high hard material using cutter
Required screw thread, after take quenching technical again, can effectively enhance high hard material hardness, process optimization；Second point：By
The heating of having a rest property, allows the outside heat of high hard material to be gradually introduced the inside of high hard material, avoids excessive temperature differentials and cause
Microgroove, the heating method being gradually incremented by by temperature allows high hard material to be gradually warmed up, is heated evenly.
Embodiment two
The high-hardness chooses 0Cr17Ni4Cu4Nb, includes the following steps：
Step 1：Including：Step 11, with temperature T1DEG C heating t1Hour, wherein 820≤T1≤ 830,0.5≤t1≤1；This
In embodiment, T is chosen1It is 825 DEG C, chooses t1It is 0.8 hour；
Step 12：Pause t2Minute, wherein 1≤t2≤5；In the present embodiment, t is chosen2It is 4 minutes；
Step 13：With temperature T2DEG C heating t3Hour, wherein 830≤T2≤ 840,0.5≤t3≤1；In the present embodiment, choosing
Take T2It is 838 DEG C, chooses t3It is 0.9 hour；At this point, the hardness requirement of the 0Cr17Ni4Cu4Nb is 29-30HRC；
Step 14：Pause t4Minute, wherein 5≤t4≤15；In the present embodiment, t is chosen4It is 12 minutes；
Step 15：With temperature T3DEG C heating t5Hour, wherein 720≤T3≤ 740,0.5≤t3≤0.8；In the present embodiment,
Choose T3It is 733 DEG C, chooses t5It is 0.7 hour, at this point, the hardness requirement of the 0Cr17Ni4Cu4Nb is 28-30HRC.
Step 2：Screw thread process is carried out by be processed threaded portion of the roller cutter to the high-hardness.
Step 3：The threaded portion of the high-hardness is quenched.
Step 4：It is cooling, in the present embodiment, keep the temperature Slow cooling.
Ageing treatment is carried out to the 0Cr17Ni4Cu4Nb after cooling, including with temperature T4DEG C heating t6Hour, wherein
470≤T4≤ 490,3.5≤t6≤4.5；In the present embodiment, T is chosen4It is 485 DEG C, chooses t5It is 4.2 hours；At this point, described
The hardness requirement of 0Cr17Ni4Cu4Nb is 39-40HRC.
By above-mentioned set-up mode, still just have the following advantages that：First point：It, can be compared with by first taking annealing process
The tissue for softening high hard material well reduces its hardness, and then guarantees preferably add in high hard material using cutter
Work go out needed for screw thread, after take quenching technical again, can effectively enhance high hard material hardness, process optimization；Second point：It is logical
Cross intermittent heating, the outside heat of high hard material allowed to be gradually introduced the inside of high hard material, avoid excessive temperature differentials and
Caused microgroove, the heating method being gradually incremented by by temperature allow high hard material to be gradually warmed up, are heated evenly.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (9)
1. a kind of Screw thread process method of high-hardness, which is characterized in that include the following steps：
Step 1：Intermittent annealing is carried out to the threaded portion to be processed of the high-hardness；
Step 2：Screw thread process is carried out by be processed threaded portion of the roller cutter to the high-hardness；
Step 3：The threaded portion of the high-hardness is quenched；
Step 4：It is cooling.
2. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that specifically wrapped in the step 1
Include following steps：
Step 11：With temperature T1DEG C heating t1Hour, wherein 820≤T1≤ 830,0.5≤t1≤1；
Step 12：Pause t2Minute, wherein 1≤t2≤5；
Step 13：With temperature T2DEG C heating t3Hour, wherein 830≤T2≤ 840,0.5≤t3≤1；
Step 14：Pause t4Minute, wherein 5≤t4≤15；
Step 15：With temperature T3DEG C heating t5Hour, wherein 720≤T3≤ 740,0.5≤t3≤0.8。
3. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that the cooling in the step 4
Step includes that furnace is cold or air-cooled.
4. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that the cooling in the step 4
Step includes heat preservation Slow cooling.
5. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that the high-hardness includes
0Cr17Ni4Cu4Nb。
6. the Screw thread process method of high-hardness as claimed in claim 2, which is characterized in that the step 11 and step 13
Vacuum drying oven is all made of to heat the high-hardness.
7. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that step 3 and step 4 it
Between, it further include being processed by shot blasting to the high-hardness.
8. the Screw thread process method of high-hardness as described in claim 1, which is characterized in that after step 4 further include pair
The high-hardness carries out ageing treatment.
9. the Screw thread process method of high-hardness as claimed in claim 8, which is characterized in that the ageing treatment includes：
With temperature T4DEG C heating t6Hour, wherein 470≤T4≤ 490,3.5≤t6≤4.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810784342.5A CN108817569A (en) | 2018-07-17 | 2018-07-17 | The Screw thread process method of high-hardness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810784342.5A CN108817569A (en) | 2018-07-17 | 2018-07-17 | The Screw thread process method of high-hardness |
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| Publication Number | Publication Date |
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| CN108817569A true CN108817569A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810784342.5A Pending CN108817569A (en) | 2018-07-17 | 2018-07-17 | The Screw thread process method of high-hardness |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109676331A (en) * | 2019-01-31 | 2019-04-26 | 安顺虹特滚珠丝杠有限责任公司 | A kind of processing method of the ball-screw with Multi-contact |
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| JPH10225741A (en) * | 1997-02-18 | 1998-08-25 | O S G Kk | Thread rolling cylindrical die and its manufacture |
| CN101428387A (en) * | 2008-12-10 | 2009-05-13 | 株洲齿轮有限责任公司 | Helix bevel gear active tooth threading machining process |
| CN104400344A (en) * | 2014-10-30 | 2015-03-11 | 无锡市威海达机械制造有限公司 | Bolt manufacturing technology |
| CN107538185A (en) * | 2017-09-22 | 2018-01-05 | 江苏赫夫特齿轮制造有限公司 | Roll spindle nose external screw thread processing method |
| CN108160738A (en) * | 2017-12-22 | 2018-06-15 | 江苏鼎胜新能源材料股份有限公司 | A kind of preparation method of high-elongation medicinal aluminum foil |
-
2018
- 2018-07-17 CN CN201810784342.5A patent/CN108817569A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10225741A (en) * | 1997-02-18 | 1998-08-25 | O S G Kk | Thread rolling cylindrical die and its manufacture |
| CN101428387A (en) * | 2008-12-10 | 2009-05-13 | 株洲齿轮有限责任公司 | Helix bevel gear active tooth threading machining process |
| CN104400344A (en) * | 2014-10-30 | 2015-03-11 | 无锡市威海达机械制造有限公司 | Bolt manufacturing technology |
| CN107538185A (en) * | 2017-09-22 | 2018-01-05 | 江苏赫夫特齿轮制造有限公司 | Roll spindle nose external screw thread processing method |
| CN108160738A (en) * | 2017-12-22 | 2018-06-15 | 江苏鼎胜新能源材料股份有限公司 | A kind of preparation method of high-elongation medicinal aluminum foil |
Non-Patent Citations (1)
| Title |
|---|
| 张建军 等: "《机械工程材料》", 31 March 2015 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109676331A (en) * | 2019-01-31 | 2019-04-26 | 安顺虹特滚珠丝杠有限责任公司 | A kind of processing method of the ball-screw with Multi-contact |
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Application publication date: 20181116 |
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