CN103498025A - Quenching process of 50# steel workpiece - Google Patents
Quenching process of 50# steel workpiece Download PDFInfo
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- CN103498025A CN103498025A CN201310442982.5A CN201310442982A CN103498025A CN 103498025 A CN103498025 A CN 103498025A CN 201310442982 A CN201310442982 A CN 201310442982A CN 103498025 A CN103498025 A CN 103498025A
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Abstract
The invention provides a quenching process of a 50# steel workpiece. The quenching process comprises the steps as follows: (1), heating up the workpiece to 850 DEG C-890 DEG C and preserving the heat for 2-3 hours; (2), quenching the workpiece in a quenching bath, wherein temperature of a quenching agent is 150 DEG C-180 DEG C and the quenching agent consists of the following components in percentage by mass: 3%-5% of sodium chloride, 1%-2% of potassium chloride and the balance of water; and (3), heating up the workpiece to 500 DEG C-550 DEG C, preserving the heat for 1 hour-2 hours, and carrying out air-cooling. The workpiece completed by applying the quenching process disclosed by the invention cannot be fractured during reforming, so that toughness of the workpiece is greatly improved and fatigue life of the workpiece is greatly prolonged.
Description
Technical field
The invention belongs to the heat treatment technics field, be specifically related to a kind of quenching technology of 50# steel workpiece.
Background technology
In existing 50# steel workpiece production process, adopt austenitizing temperature heating low temperature quenching, 880 ℃ heating and continuous about 60 minutes, at 100 ℃ of oil quenchings, keep coming out of the stove in about 20 minutes, the quenching metallographic is martensitic stucture, strong hardness is high, 300 ℃ of continuous holding about 100 minutes of tempering, and the larger part of indivedual distortion is difficult for shaping, fracture while forcing shaping, folding test<30 °, without resilience, easy fracture.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of quenching technology 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.
The invention provides a kind of quenching technology of 50# steel workpiece, step is as follows:
(1), workpiece is heated to 850-890 ℃, insulation 2-3 hour;
(2), put into quenching tank and quench, the temperature of quenching medium is 50-80 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 3-5%, and Repone K 1-2%, all the other are water;
(3), workpiece is heated to 500-550 ℃, insulation 1-2 hour; Then air-cooled.
Preferably, in step (1), workpiece is heated to 870 ℃, is incubated 2.5 hours.
Preferably, in step (2), the temperature of quenching medium is 60 ℃.
Preferably, in step (2), quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, and Repone K 1%, all the other are water.
Preferably, in step (2), workpiece is heated to 530 ℃, is incubated 1.5 hours.
Apply workpiece that quenching technology of the present invention machines when shaping not fracture manifest, greatly improved obdurability and fatigue lifetime.
Embodiment
embodiment 1
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 870 ℃, be incubated 2.5 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 60 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, and Repone K 1%, all the other are water;
(3), workpiece is heated to 530 ℃, be incubated 1.5 hours; Then air-cooled.
embodiment 2
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 850 ℃, be incubated 2.5 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 70 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, and Repone K 1%, all the other are water;
(3), workpiece is heated to 500 ℃, be incubated 1.5 hours; Then air-cooled.
embodiment 3
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 890 ℃, be incubated 2.5 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 70 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, and Repone K 2%, all the other are water;
(3), workpiece is heated to 500 ℃, be incubated 2 hours; Then air-cooled.
embodiment 4
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 860 ℃, be incubated 3 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 50 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, and Repone K 2%, all the other are water;
(3), workpiece is heated to 500 ℃, be incubated 1 hour; Then air-cooled.
embodiment 5
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 885 ℃, be incubated 2 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 80 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 5%, and Repone K 2%, all the other are water;
(3), workpiece is heated to 550 ℃, be incubated 2 hours; Then air-cooled.
embodiment 6
The quenching technology of 50# steel workpiece of the present invention, step is as follows:
(1), workpiece is heated to 890 ℃, be incubated 3 hours;
(2), put into quenching tank and quench, the temperature of quenching medium is 55 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 3%, and Repone K 2%, all the other are water;
(3), workpiece is heated to 550 ℃, be incubated 2 hours; Then air-cooled.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment, the present invention is had been described in detail, for a person skilled in the art, its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the quenching technology of a 50# steel workpiece, step is as follows:
(1), workpiece is heated to 850-890 ℃, insulation 2-3 hour;
(2), put into quenching tank and quench, the temperature of quenching medium is 50-80 ℃; Wherein, quenching medium is comprised of each component of following mass percent: sodium-chlor 3-5%, and Repone K 1-2%, all the other are water;
(3), workpiece is heated to 500-550 ℃, insulation 1-2 hour; Then air-cooled.
2. quenching technology according to claim 1, is characterized in that: in step (1), workpiece is heated to 870 ℃, is incubated 2.5 hours.
3. quenching technology according to claim 1, it is characterized in that: in step (2), the temperature of quenching medium is 60 ℃.
4. quenching technology according to claim 1, it is characterized in that: in step (2), quenching medium is comprised of each component of following mass percent: sodium-chlor 4%, Repone K 1%, all the other are water.
5. quenching technology according to claim 1, is characterized in that: in step (2), workpiece is heated to 530 ℃, is incubated 1.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442982.5A CN103498025A (en) | 2013-09-26 | 2013-09-26 | Quenching process of 50# steel workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442982.5A CN103498025A (en) | 2013-09-26 | 2013-09-26 | Quenching process of 50# steel workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103498025A true CN103498025A (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310442982.5A Pending CN103498025A (en) | 2013-09-26 | 2013-09-26 | Quenching process of 50# steel workpiece |
Country Status (1)
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| CN (1) | CN103498025A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747199A (en) * | 2012-07-16 | 2012-10-24 | 鑫光热处理工业(昆山)有限公司 | Continuous isothermal quenching method for C50E4 steel workpieces |
-
2013
- 2013-09-26 CN CN201310442982.5A patent/CN103498025A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747199A (en) * | 2012-07-16 | 2012-10-24 | 鑫光热处理工业(昆山)有限公司 | Continuous isothermal quenching method for C50E4 steel workpieces |
Non-Patent Citations (1)
| Title |
|---|
| 刘庚武等: ""50钢车轴的锻造与热处理工艺探讨"", 《机车车辆工艺》 * |
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Application publication date: 20140108 |