CN102747199A - Continuous isothermal quenching method for C50E4 steel workpieces - Google Patents
Continuous isothermal quenching method for C50E4 steel workpieces Download PDFInfo
- Publication number
- CN102747199A CN102747199A CN2012102451355A CN201210245135A CN102747199A CN 102747199 A CN102747199 A CN 102747199A CN 2012102451355 A CN2012102451355 A CN 2012102451355A CN 201210245135 A CN201210245135 A CN 201210245135A CN 102747199 A CN102747199 A CN 102747199A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- continuous
- quenching
- salt bath
- minutes
- 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
- 238000010791 quenching Methods 0.000 title claims abstract description 38
- 230000000171 quenching effect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 5
- 229910001563 bainite Inorganic materials 0.000 abstract description 4
- 238000005496 tempering Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a continuous isothermal quenching method for C50E4 steel workpieces. The continuous isothermal quenching method for the C50E4 steel workpieces includes the steps of firstly, continuously heating a workpiece at the temperature of 830 DEG C to 900 DEG C for 20-50 minutes; secondly, performing salt bath quenching, namely isothermally quenching the heated workpiece in a salt bath at the temperature of 200 DEG C to 360 DEG C for 20-40 minutes; thirdly, using clean water to wash the workpiece subjected to salt bath quenching. The continuous isothermal quenching method solves the problem that workpieces in the prior art are poor in toughness and fatigue strength and difficult to shape. The workpiece is subjected to continuous heating prior to isothermal quenching in salt bath so as to form bainite structure, a tempering procedure is omitted, and accordingly the processed workpiece never fractures in shaping, toughness is improved greatly, fatigue life is prolonged greatly, bending test at the angle of larger than 100 DEG shows no fracture, rebound is about 40 DEG C, and fracture reject rate is zero.
Description
Technical field
The present invention relates to a kind of continuous isothermal quench method of 50# steel workpiece, belonged to the heat treatment technics field.
Background technology
In existing 50# steel workpiece production process, adopt austenitizing temperature heating low temperature quenching, heating and continuous about 60 minutes at 880 ℃; Came out of the stove in about 20 minutes 100 ℃ of oil quenchings maintenances, the quenching metallographic is a martensitic stucture, and strong hardness is high; 300 ℃ of continuous holding about 100 minutes of tempering, the bigger part of indivedual distortion is difficult for shaping, ruptures when forcing shaping; Folding test＜30 °, no resilience, the easy fracture.
Summary of the invention
Technical problem to be solved by this invention provides a kind of continuous isothermal quench method of 50# steel workpiece, can effectively strengthen the toughness of workpiece, makes the distortion of workpiece little, and well improved fatigue lifetime, and the fracture defective products is zero.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopted is:
A kind of continuous isothermal quench method of 50# steel workpiece comprises the steps:
(1) heating was continuously heated 20-50 minutes in 830 ° of-900 ° of TRs workpiece continuously;
(2) salt bath quenching, the workpiece that heating is accomplished are placed in 200 ° of salt baths in-360 ° of TRs isothermal quenching 20-40 minute;
(3) clean, clean the workpiece that salt bath quenching is accomplished through clear water.
The continuous isothermal quench method of aforesaid 50# steel workpiece is characterized in that: continuous Heating temperature is preferably 880 ° in the said step (1).
The continuous isothermal quench method of aforesaid 50# steel workpiece is characterized in that: be preferably 30 minutes heat-up time continuously in the said step (1).
The continuous isothermal quench method of aforesaid 50# steel workpiece is characterized in that: the interior temperature of salt bath is preferably 230 ° in the said step (2).
The continuous isothermal quench method of aforesaid 50# steel workpiece is characterized in that: the isothermal cool time is preferably 30 minutes in the said step (2).
The invention has the beneficial effects as follows: through workpiece being continued heating back isothermal quenching in salt bath; Form bainite structure, cancelled tempering process, fracture does not take place when making the workpiece shaping that machines manifest; Improve obdurability and fatigue lifetime greatly; Folding test＞100 ° not fracture, about 40 °, the fracture fraction defective is zero after the resilience.
Embodiment
To do further explain to the present invention below.
The continuous isothermal quench method of 50# steel workpiece of the present invention, with not tempering after the product isothermal quenching after heating continuously, the group of products of formation is woven to bainite structure, specifically, comprises the steps:
(1) continuously heating was heated 20-50 minutes in 830 ° of-900 ° of TRs workpiece continuously, realized the austenite heating, and through comparing repeatedly, Heating temperature is 880 °, and be that the toughness of workpiece is stronger under 30 minutes conditions heat-up time;
(2) salt bath quenching, the workpiece that heating is accomplished are placed in 200 ° of salt baths in-360 ° of TRs isothermal quenching 20-40 minute; Make the workpiece that machines be organized as bainite structure, through experimental comparison, the salt bath temperature is 230 °, and the isothermal quenching time, the distortion of workpiece was little when being 30 minutes, obtains fatigue lifetime the most effectively improving, and the fracture fraction defective reduces;
(3) clean, clean the workpiece that salt bath quenching is accomplished through clear water.
The workpiece that machines is carried out HRC hardness to be detected; The result who detects is about 51, ruptures during the bigger part shaping of indivedual deflections, improves obdurability and fatigue lifetime greatly; Do not rupture during folding test＞100 °, resilience palintrope curvature is about 40 °.
The invention provides a kind of continuous isothermal quench method of 50# steel workpiece, can effectively strengthen the toughness of workpiece, make the distortion of workpiece little, well improved fatigue lifetime, and the fracture defective products is zero.
More than show and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain by appending claims and equivalent circle thereof.
Claims (5)
1. the continuous isothermal quench method of a 50# steel workpiece is characterized in that: comprise the steps:
(1) heating was continuously heated 20-50 minutes in 830 ° of-900 ° of TRs workpiece continuously;
(2) salt bath quenching, the workpiece that heating is accomplished are placed in 200 ° of salt baths in-360 ° of TRs isothermal quenching 20-40 minute;
(3) clean, clean the workpiece that salt bath quenching is accomplished through clear water.
2. the continuous isothermal quench method of 50# steel workpiece according to claim 1 is characterized in that: continuous Heating temperature is preferably 880 ° in the said step (1).
3. the continuous isothermal quench method of 50# steel workpiece according to claim 1 and 2 is characterized in that: be preferably 30 minutes heat-up time continuously in the said step (1).
4. with the continuous isothermal quench method of the described 50# steel workpiece of claim 3, it is characterized in that: the interior temperature of salt bath is preferably 230 ° in the said step (2).
5. the continuous isothermal quench method of 50# steel workpiece according to claim 4 is characterized in that: the isothermal cool time is preferably 30 minutes in the said step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102451355A CN102747199A (en) | 2012-07-16 | 2012-07-16 | Continuous isothermal quenching method for C50E4 steel workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102451355A CN102747199A (en) | 2012-07-16 | 2012-07-16 | Continuous isothermal quenching method for C50E4 steel workpieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102747199A true CN102747199A (en) | 2012-10-24 |
Family
ID=47027686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102451355A Pending CN102747199A (en) | 2012-07-16 | 2012-07-16 | Continuous isothermal quenching method for C50E4 steel workpieces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102747199A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484613A (en) * | 2013-09-26 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for steel NO. 50 |
| CN103484615A (en) * | 2013-09-26 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for steel NO. 50 |
| CN103484622A (en) * | 2013-09-23 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for workpiece made of steel No.50 |
| CN103498025A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching process of 50# steel workpiece |
| CN103498024A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching treatment method of 50# steel |
| CN105886714A (en) * | 2014-10-20 | 2016-08-24 | 重庆长安工业(集团)有限责任公司 | 50 steel ultrafine martensite isothermal quenching thermal treatment hardening process |
| CN113667811A (en) * | 2021-08-24 | 2021-11-19 | 河北科技师范学院 | Isothermal heat treatment method of steel shovel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452218A (en) * | 1990-06-21 | 1992-02-20 | Toyota Motor Corp | Manufacture of high toughness cast steel |
| CN1766134A (en) * | 2005-11-01 | 2006-05-03 | 广东工业大学 | 50 steel computer CPU buckle heat treatment process |
| WO2007054063A2 (en) * | 2005-11-10 | 2007-05-18 | C.D. Wälzholz Kg. | Method and device for the continuous creation of a bainite structure in a carbon steel, especially a strip steel |
| CN102108433A (en) * | 2011-04-01 | 2011-06-29 | 瓦房店轴承集团有限责任公司 | Method for quenching bearing steel |
| CN102505067A (en) * | 2011-12-29 | 2012-06-20 | 瓦房店轴承集团有限责任公司 | Bainite quenching method at variable temperatures of high-carbon-chromium bearing steel |
-
2012
- 2012-07-16 CN CN2012102451355A patent/CN102747199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452218A (en) * | 1990-06-21 | 1992-02-20 | Toyota Motor Corp | Manufacture of high toughness cast steel |
| CN1766134A (en) * | 2005-11-01 | 2006-05-03 | 广东工业大学 | 50 steel computer CPU buckle heat treatment process |
| WO2007054063A2 (en) * | 2005-11-10 | 2007-05-18 | C.D. Wälzholz Kg. | Method and device for the continuous creation of a bainite structure in a carbon steel, especially a strip steel |
| CN102108433A (en) * | 2011-04-01 | 2011-06-29 | 瓦房店轴承集团有限责任公司 | Method for quenching bearing steel |
| CN102505067A (en) * | 2011-12-29 | 2012-06-20 | 瓦房店轴承集团有限责任公司 | Bainite quenching method at variable temperatures of high-carbon-chromium bearing steel |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484622A (en) * | 2013-09-23 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for workpiece made of steel No.50 |
| CN103484613A (en) * | 2013-09-26 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for steel NO. 50 |
| CN103484615A (en) * | 2013-09-26 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for steel NO. 50 |
| CN103498025A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching process of 50# steel workpiece |
| CN103498024A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching treatment method of 50# steel |
| CN103498024B (en) * | 2013-09-26 | 2015-09-02 | 无锡阳工机械制造有限公司 | A kind of quenching process of No. 50 steel |
| CN103484615B (en) * | 2013-09-26 | 2015-09-30 | 无锡阳工机械制造有限公司 | A kind of quenching method of No. 50 steel |
| CN105886714A (en) * | 2014-10-20 | 2016-08-24 | 重庆长安工业(集团)有限责任公司 | 50 steel ultrafine martensite isothermal quenching thermal treatment hardening process |
| CN113667811A (en) * | 2021-08-24 | 2021-11-19 | 河北科技师范学院 | Isothermal heat treatment method of steel shovel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102747199A (en) | Continuous isothermal quenching method for C50E4 steel workpieces | |
| CN104032117B (en) | A kind of heat treatment method of ultrahigh hardness non-ferrous metal cold roll | |
| CN106544494B (en) | A kind of online soft annealing method suitable for 1Cr17Ni2 stainless steel cold pull wires | |
| CN108728610A (en) | A kind of spring steel wire processing technology improving high strength spring steel wire fatigue behaviour | |
| CN103394573A (en) | Hot stamping forming process based on Q&P one-step method | |
| CN101974676B (en) | Breaking-preventing knuckle spindle and thermal treatment method thereof | |
| CN104195450A (en) | Heat treatment method of cold-rolled working roll with high wear resistance and roll mark resistance | |
| CN104357643B (en) | Net carbide Technology for Heating Processing is eliminated after a kind of roll forging | |
| CN103639231B (en) | A kind of manufacture method of chrome molybdenum low-alloy galvanized strand wires | |
| CN101598172A (en) | A kind of eccentric shaft and manufacture method thereof | |
| CN107378392A (en) | A kind of high-strength bolt processing technology | |
| CN106119474A (en) | A kind of high-speed steel milling cutter Technology for Heating Processing | |
| CN105666074A (en) | Production process for oil pump nozzle | |
| CN105648446A (en) | Heat treatment process for 20CrMnTi gear steel | |
| CN104404220A (en) | 60Si2Mn steel spring heat treatment method | |
| CN106755855A (en) | A kind of high strength Cr 12MoV/Cr12 clad steels high temperature quenching technical | |
| CN103737020B (en) | The method for turning of the steam turbine main steam control valve bar cylindrical of high temperature alloy GH901 material | |
| CN105755251A (en) | Post-treatment process for spring reinforcement | |
| CN116555533A (en) | 1.4923 forging heat treatment process | |
| CN102703672B (en) | Large-caliber thick-wall steel pipe and normalizing method thereof | |
| CN103572022B (en) | Heat-treatment method for H13 section steel | |
| CN103725831A (en) | Hardening and tempering process of alloy-steel pipe | |
| CN107457343A (en) | Closed forging technology is carried out to hollow stabilizing rod termination | |
| CN104894573A (en) | Method for carburizing and quenching of cylindrical gear | |
| CN104294164B (en) | A kind of high-carbon chromium steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121024 |