CN104264199A - A nut thermal treatment process - Google Patents
A nut thermal treatment process Download PDFInfo
- Publication number
- CN104264199A CN104264199A CN201410416828.5A CN201410416828A CN104264199A CN 104264199 A CN104264199 A CN 104264199A CN 201410416828 A CN201410416828 A CN 201410416828A CN 104264199 A CN104264199 A CN 104264199A
- Authority
- CN
- China
- Prior art keywords
- nut
- carry out
- temperature
- thermal treatment
- treatment process
- 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.)
- Pending
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
- 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
- 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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
Abstract
A nut thermal treatment process is disclosed. The process includes following steps of: 1) subjecting a nut to primary hardening and tempering treatment in a heating furnace to make hardness of the nut reaching HRC25-40; 2) putting the nut into a preheating furnace, controlling the charging temperature to be lower than 300 DEG C, raising the temperature to 500 DEG C at a heating rate of 50-100 DEG C per hour, and maintaining the temperature for 2-3 h; 3) maintaining the temperature in a salt bath furnace having a temperature of 600-620 DEG C for 5-6 h, and quenching; 4) performing ultrasonic cleaning by adoption of an ultrasonic device, taking the nut out, putting the nut into a water pool, and performing high-pressure washing by a high-pressure water gun; and 5) sintering with tap water, drying by blowing by an air inducing device, performing chromium electroplating on the surface of the nut after the nut is dried, and cleaning and drying after electroplating. By the manner, the treated nut is small in percentage reduction of area, high in match rate, and low in rejection rate, and avoids using of cyanide type impregnation agents harmful to human bodies and the environment.
Description
Technical field
The present invention relates to standardized component field, particularly relate to a kind of nut thermal treatment process.
Background technology
The thermal treatment process of the nut that requirement of strength is high usually adopts carburizing or cyaniding to add the techniques such as Q-tempering and processes, and annealing adopts 850-900 DEG C and is incubated 10 hours, but nut relative reduction in area when quenching becomes large, fit rate step-down, and scrap rate becomes large.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of nut thermal 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 nut thermal treatment process, comprise the steps:
1) by nut first modifier treatment in process furnace, nut hardness is made to reach HRC25-40;
2) put in preheating oven by nut, charging temperature controls below 300 DEG C, then with the ramp to 500 degree Celsius of intensification 50-100 per hour DEG C, and keeps 2-3 hour;
3) in the salt bath furnace of 600-620 DEG C, be incubated 5-6 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 500-510 DEG C with 50-55 DEG C/min, and described nitrate quenching agent is the quenching medium that saltpetre and SODIUMNITRATE mix by the mass ratio of 2:1;
4) 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; When high pressure water spray gun carries out high pressure washing, first rinse 20-30 minute with 0.35-0.5MPa low speed flow 2-8m3/h, then be that 12-20m3/h rinses 35-45 minute with high speed flow;
5) use tap water to carry out rinsing, then use air inducing equipment to dry up, dry up rear effects on surface and carry out electrodeposited chromium; Plating afterwash is dried.
In a preferred embodiment of the present invention, the optimum temps of described preheating oven is 300 degrees Celsius, and best soaking time is 2 hours.
In a preferred embodiment of the present invention, in described step 4), the low speed flow optimal clean time is 20 minutes, and the high speed flow optimal clean time is 40 minutes.
The invention has the beneficial effects as follows: the nut relative reduction in area of process of the present invention is little, and fit rate is high, scrap rate reduces, and avoids using the Cyanides penetration enhancer to human body and bad environmental.
Embodiment
A kind of nut thermal treatment process, comprises the steps:
1) by nut first modifier treatment in process furnace, nut hardness is made to reach HRC25-40;
2) put in preheating oven by nut, charging temperature controls below 300 DEG C, then with the ramp to 500 degree Celsius of intensification 50-100 per hour DEG C, and keeps 2-3 hour;
3) in the salt bath furnace of 600-620 DEG C, be incubated 5-6 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 500-510 DEG C with 50-55 DEG C/min, and described nitrate quenching agent is the quenching medium that saltpetre and SODIUMNITRATE mix by the mass ratio of 2:1;
4) 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; When high pressure water spray gun carries out high pressure washing, first rinse 20-30 minute with 0.35-0.5MPa low speed flow 2-8m3/h, then be that 12-20m3/h rinses 35-45 minute with high speed flow;
5) use tap water to carry out rinsing, then use air inducing equipment to dry up, dry up rear effects on surface and carry out electrodeposited chromium; Plating afterwash is dried.
The optimum temps of described preheating oven is 300 degrees Celsius, and best soaking time is 2 hours.
In described step 4), the low speed flow optimal clean time is 20 minutes, and the high speed flow optimal clean time is 40 minutes.
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. nut thermal treatment process, is characterized in that, comprises the steps:
1) by nut first modifier treatment in process furnace, nut hardness is made to reach HRC25-40;
2) put in preheating oven by nut, charging temperature controls below 300 DEG C, then with the ramp to 500 degree Celsius of intensification 50-100 per hour DEG C, and keeps 2-3 hour;
3) in the salt bath furnace of 600-620 DEG C, be incubated 5-6 hour again to quench; Described quenching adopts nitrate quenching agent to be at the uniform velocity quenched to 500-510 DEG C with 50-55 DEG C/min, and described nitrate quenching agent is the quenching medium that saltpetre and SODIUMNITRATE mix by the mass ratio of 2:1;
4) 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; When high pressure water spray gun carries out high pressure washing, first rinse 20-30 minute with 0.35-0.5MPa low speed flow 2-8m3/h, then be that 12-20m3/h rinses 35-45 minute with high speed flow;
5) use tap water to carry out rinsing, then use air inducing equipment to dry up, dry up rear effects on surface and carry out electrodeposited chromium; Plating afterwash is dried.
2. nut thermal treatment process according to claim 1, is characterized in that, the optimum temps of described preheating oven is 300 degrees Celsius, and best soaking time is 2 hours.
3. nut thermal treatment process according to claim 1, is characterized in that, in described step 4), the low speed flow optimal clean time is 20 minutes, and the high speed flow optimal clean time is 40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416828.5A CN104264199A (en) | 2014-08-22 | 2014-08-22 | A nut thermal treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416828.5A CN104264199A (en) | 2014-08-22 | 2014-08-22 | A nut thermal treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104264199A true CN104264199A (en) | 2015-01-07 |
Family
ID=52155767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410416828.5A Pending CN104264199A (en) | 2014-08-22 | 2014-08-22 | A nut thermal treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104264199A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149023A (en) * | 2015-04-23 | 2016-11-23 | 思维福特南通精密机械有限公司 | Bearing block processing technique |
-
2014
- 2014-08-22 CN CN201410416828.5A patent/CN104264199A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149023A (en) * | 2015-04-23 | 2016-11-23 | 思维福特南通精密机械有限公司 | Bearing block processing technique |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102747316B (en) | Salt bath nitriding pre-treatment and gas nitriding complex heat treatment process of anti-corrosion stainless steel parts | |
| CN105349749A (en) | Bolt heat treatment technology | |
| CN100510118C (en) | Double quenching technique for 9Cr2Mo leveler roll | |
| CN101580926A (en) | Salt-bath heat treatment technology of piston rod | |
| CN102995029A (en) | Heat treatment process of bolt processing | |
| CN107653433B (en) | A kind of heat treatment process of automobile gimbal cross axle | |
| RU2015141563A (en) | HIGH-STRENGTH STEEL WITH GOOD PLASTICITY AND METHOD FOR PRODUCING BY TREATMENT BY HARDENING WITH DISTRIBUTION WITH THE BATH FOR ZINC PLATING | |
| CN103643018A (en) | Thermal processing technology for bolts | |
| CN106119472A (en) | Bolt Technology for Heating Processing | |
| CN102994707A (en) | Heat treatment process in high-strength nut processing | |
| CN109023221A (en) | The heat treatment method of aero-engine blade mounting base | |
| CN104264199A (en) | A nut thermal treatment process | |
| CN105695922A (en) | Surface glow ion nitriding method of 30Cr3SiNiMoVA steel | |
| WO2019223491A1 (en) | Method for manufacturing high-strength crankshaft | |
| CN103757181A (en) | High-strength nut heat treatment technology | |
| CN109957648A (en) | A kind of gear steel heat treatment process | |
| CN110592328A (en) | Surface heat treatment process for metal piece | |
| CN103045816A (en) | Quenching and bluing solution and using method thereof | |
| CN101994121A (en) | Composite heat treatment method | |
| CN109609892A (en) | A kind of heat treatment process of automobile club | |
| CN102041512A (en) | Process method for austenitic nitridation | |
| CN111020459B (en) | Heat treatment method for small conical bearing | |
| CN105624378A (en) | Surface treatment process for spring | |
| CN107937862A (en) | A kind of carburization process for chain production | |
| CN105483609A (en) | Circulating QPQ treatment technology of high-speed steel tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |
|
| WD01 | Invention patent application deemed withdrawn after publication |