CN105349749A - Bolt heat treatment technology - Google Patents
Bolt heat treatment technology Download PDFInfo
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- CN105349749A CN105349749A CN201410416840.6A CN201410416840A CN105349749A CN 105349749 A CN105349749 A CN 105349749A CN 201410416840 A CN201410416840 A CN 201410416840A CN 105349749 A CN105349749 A CN 105349749A
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- bolt
- temperature
- heat treatment
- quenching
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Abstract
The invention discloses a bolt heat treatment technology which comprises the following steps: 1) ultrasonic cleaning is carried out by ultrasonic equipment; a bolt is taken out of the ultrasonic equipment and then put into a water tank to undergo high-pressure washing by the use of a high-pressure water pistol; and then the bolt is naturally aired for 20-30 min; 2) the bolt is preheated for 2-3 h while the preheating furnace temperature is 440-460 DEG C; (3) the bolt undergoes thermal insulation in a salt-bath furnace of 600-620 DEG C for 2-3 h and then undergoes quenching; 4) after quenching, the bolt undergoes tempering at the temperature of 180-200 DEG C, and thermal insulation is then carried out for 20-30 min to stabilize the structure; and after thermal insulation is then carried out in a tempering furnace of 300-305 DEG C for 8-10 h, the bolt is air-cooled to normal temperature; 5) the bolt is successively immersed into a phosphorization tank and a saponification tank; and 6) the bolt is finally washed and aired to obtain a finished product. Through the above mode, the prepared bolt has low shrinkage on cross section, match rate is raised, rejection rate is reduced, and use of cyanide permeating agents which are harmful to human body and the environment is avoided.
Description
Technical field
The present invention relates to standardized component field, particularly relate to a kind of bolt heat treatment process.
Background technology
The treatment process of the bolt that intensity is high adopts carburizing or cyaniding to add the techniques such as Q-tempering to process, and adopt the 850-900 DEG C of Full Annealing technique being incubated 10 hours, but utilize the bolt of this explained hereafter relative reduction in area when quenching larger, deformation rate is large, low with the fit rate of nut, scrap rate is too high.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of bolt heat treatment process, can solve the problem.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of bolt heat treatment process, comprise the steps:
1) ultrasonic equipment is adopted to carry out ultrasonic cleaning; Carry out after taking-up putting into pond, carry out high pressure washing with high pressure water spray gun; Then naturally 20-30 minute is dried;
2) by bolt preheating 2-3 hour, preheating oven furnace temperature 440-460 DEG C;
3) in the salt bath furnace of 600-620 DEG C, be incubated 2-3 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 550-600 DEG C with 50-55 DEG C/min;
4), after bolt quenching, be tempering under the condition of 180-200 DEG C in temperature, be then incubated 20-30 minute, with stabilizing tissue; Again the tempering stove inside holding of 300-305 DEG C after 8-10 hour air cooling to normal temperature;
5) bolt is immersed successively in phosphating pond and saponification pond; For volumetric concentration is the zinc calcium phosphorization liquid of 10-11% in described phosphating pond, the temperature of Phosphating Solution is 65-75 DEG C, and steel pipe dipping time is 25-30 minute.
6) finally clean for bolt drying is obtained finished product.
In a preferred embodiment of the present invention, step 2) best furnace temperature be 450 degrees Celsius, preheating Best Times is 2 hours.
In a preferred embodiment of the present invention, the best soaking time of the salt bath furnace of step 4) is 2 hours.
The invention has the beneficial effects as follows: the bolt relative reduction in area that the present invention obtains is little, fit rate improves, and scrap rate reduces, and avoids using the Cyanides penetration enhancer to human body and bad environmental.
Embodiment
A kind of bolt heat treatment process, comprises the steps:
1) ultrasonic equipment is adopted to carry out ultrasonic cleaning; Carry out after taking-up putting into pond, carry out high pressure washing with high pressure water spray gun; Then naturally 20-30 minute is dried;
2) by bolt preheating 2-3 hour, preheating oven furnace temperature 440-460 DEG C;
3) in the salt bath furnace of 600-620 DEG C, be incubated 2-3 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 550-600 DEG C with 50-55 DEG C/min;
4), after bolt quenching, be tempering under the condition of 180-200 DEG C in temperature, be then incubated 20-30 minute, with stabilizing tissue; Again the tempering stove inside holding of 300-305 DEG C after 8-10 hour air cooling to normal temperature;
5) bolt is immersed successively in phosphating pond and saponification pond; For volumetric concentration is the zinc calcium phosphorization liquid of 10-11% in described phosphating pond, the temperature of Phosphating Solution is 65-75 DEG C, and steel pipe dipping time is 25-30 minute;
6) finally clean for bolt drying is obtained finished product.
Described step 2) best furnace temperature be 450 degrees Celsius, preheating Best Times is 2 hours.
The best soaking time of the salt bath furnace of described step 4) is 2 hours.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. bolt heat treatment process, is characterized in that, comprises the steps:
1) ultrasonic equipment is adopted to carry out ultrasonic cleaning; Carry out after taking-up putting into pond, carry out high pressure washing with high pressure water spray gun; Then naturally 20-30 minute is dried;
2) by bolt preheating 2-3 hour, preheating oven furnace temperature 440-460 DEG C;
3) in the salt bath furnace of 600-620 DEG C, be incubated 2-3 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 550-600 DEG C with 50-55 DEG C/min;
4), after bolt quenching, be tempering under the condition of 180-200 DEG C in temperature, be then incubated 20-30 minute, with stabilizing tissue; Again the tempering stove inside holding of 300-305 DEG C after 8-10 hour air cooling to normal temperature;
5) bolt is immersed successively in phosphating pond and saponification pond; For volumetric concentration is the zinc calcium phosphorization liquid of 10-11% in described phosphating pond, the temperature of Phosphating Solution is 65-75 DEG C, and steel pipe dipping time is 25-30 minute;
6) finally clean for bolt drying is obtained finished product.
2. bolt heat treatment process according to claim 1, is characterized in that, described step 2) best furnace temperature be 450 degrees Celsius, preheating Best Times is 2 hours.
3. bolt heat treatment process according to claim 1, is characterized in that, the best soaking time of the salt bath furnace of described step 4) is 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416840.6A CN105349749A (en) | 2014-08-22 | 2014-08-22 | Bolt heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416840.6A CN105349749A (en) | 2014-08-22 | 2014-08-22 | Bolt heat treatment technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105349749A true CN105349749A (en) | 2016-02-24 |
Family
ID=55325808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410416840.6A Pending CN105349749A (en) | 2014-08-22 | 2014-08-22 | Bolt heat treatment technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105349749A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908087A (en) * | 2016-07-05 | 2016-08-31 | 安庆市灵宝机械有限责任公司 | High-temperature-resistant and abrasion-resistant alloy steel for bucket teeth of coal cutter and preparation method of high-temperature-resistant and abrasion-resistant alloy steel for bucket teeth of coal cutter |
| CN107435088A (en) * | 2017-07-06 | 2017-12-05 | 江苏永昊高强度螺栓有限公司 | The Technology for Heating Processing of bolt |
| CN108570545A (en) * | 2018-04-04 | 2018-09-25 | 海宁市丁桥镇永畅知识产权服务部 | The heat treatment process of automobile bolt |
| CN109097538A (en) * | 2018-09-27 | 2018-12-28 | 深圳市和胜金属技术有限公司 | A kind of metal surface treating device |
| CN109628718A (en) * | 2017-10-09 | 2019-04-16 | 徐州东鹏工具制造有限公司 | A kind of heat treatment process of bolt |
| CN113088642A (en) * | 2021-03-31 | 2021-07-09 | 南京鼎胜冶金机械有限公司 | Salt bath quenching heat treatment equipment for high-wear-resistance shear blades |
-
2014
- 2014-08-22 CN CN201410416840.6A patent/CN105349749A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908087A (en) * | 2016-07-05 | 2016-08-31 | 安庆市灵宝机械有限责任公司 | High-temperature-resistant and abrasion-resistant alloy steel for bucket teeth of coal cutter and preparation method of high-temperature-resistant and abrasion-resistant alloy steel for bucket teeth of coal cutter |
| CN107435088A (en) * | 2017-07-06 | 2017-12-05 | 江苏永昊高强度螺栓有限公司 | The Technology for Heating Processing of bolt |
| CN109628718A (en) * | 2017-10-09 | 2019-04-16 | 徐州东鹏工具制造有限公司 | A kind of heat treatment process of bolt |
| CN108570545A (en) * | 2018-04-04 | 2018-09-25 | 海宁市丁桥镇永畅知识产权服务部 | The heat treatment process of automobile bolt |
| CN109097538A (en) * | 2018-09-27 | 2018-12-28 | 深圳市和胜金属技术有限公司 | A kind of metal surface treating device |
| CN109097538B (en) * | 2018-09-27 | 2023-05-09 | 深圳市和胜金属技术有限公司 | Metal surface treatment equipment |
| CN113088642A (en) * | 2021-03-31 | 2021-07-09 | 南京鼎胜冶金机械有限公司 | Salt bath quenching heat treatment equipment for high-wear-resistance shear blades |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160224 |