CN108531691A - A kind of carbon steel quenching technical - Google Patents
A kind of carbon steel quenching technical Download PDFInfo
- Publication number
- CN108531691A CN108531691A CN201810311881.7A CN201810311881A CN108531691A CN 108531691 A CN108531691 A CN 108531691A CN 201810311881 A CN201810311881 A CN 201810311881A CN 108531691 A CN108531691 A CN 108531691A
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- CN
- China
- Prior art keywords
- workpiece
- quenching
- carbon steel
- temperature
- isothermal
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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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
Abstract
The present invention relates to technical field of metal heat treatment, disclose a kind of carbon steel quenching technical, include the following steps：S1, workpiece is subjected to hot pressing stretching, the workpiece after hot pressing stretches enters insulation in holding furnace；S2, will through step S1, treated that workpiece is put into hierarchical quenching oil, carry out first order isothermal hardening；S3, workpiece after step S2 processing is taken out from hierarchical quenching oil, is put into holding furnace and is kept the temperature, and straightening pull is carried out to workpiece simultaneously；S4, second level isothermal hardening will be carried out through step S3 treated workpiece, and keeps the temperature the regular hour；S5, the workpiece through the second level step S4 means of isothermal quenching is put into spray hardening slot, spray quenching is carried out but to workpiece, that is, completes the quenching technical.Carbon steel quenching technical of the present invention, the carbon steel that processing high-hardness, wear resistant corrosion resistant, thickness are thin and toughness is strong.
Description
Technical field
The present invention relates to technical field of metal heat treatment more particularly to a kind of carbon steel quenching technicals.
Background technology
In the prior art, the parts and components of many fluid machineries have special requirement, such as the impeller of transh pump, pump case
Flow passage components are to need machined and require the structural member that high-precision, high rigidity, high intensity, thickness are thin and toughness is big, this
It is because this kind of structural member is typically to be operated in the operating mode containing the similar hard particles such as quartz sand and corrosive medium
Work so that this kind of structural member usually causes to scrap because wearing or corroding.Such as select stainless steel, the manufacture of nickelic Elverite
This kind of structural member, although can meet corrosion resistant requirement, material hardness, the intensity of these materials are relatively low and not wear-resisting；And
High chromium Elverite is selected to manufacture this kind of structural member, although anti-erosion performance is excellent, there are brittleness for the material of this material
Greatly, the low problem of intensity.Moreover, above-mentioned material is high in the prevalence of price, machinability is poor, high processing costs, processing
Precision it is difficult to ensure that the problems such as.
Therefore, in the prior art there are problem, it is urgent to provide a kind of high rigidity, wear resistant corrosion resistant, thickness it is thin and
The strong carbon steel quenching technology of toughness.
Invention content
The purpose of the present invention is to provide a kind of carbon steel quenching technical, processing high-hardness, wear resistant corrosion resistant, thickness are thin and tough
The strong carbon steel of property.
For this purpose, the present invention uses following technical scheme：
A kind of carbon steel quenching technical, includes the following steps：
S1, workpiece is subjected to hot pressing stretching, the workpiece after hot pressing stretches enters insulation in holding furnace；
S2, will through step S1, treated that workpiece is put into hierarchical quenching oil, carry out first order isothermal hardening；
S3, workpiece after step S2 processing is taken out from hierarchical quenching oil, is put into holding furnace and is kept the temperature, and is same
When to workpiece carry out straightening pull；
S4, second level isothermal hardening will be carried out through step S3 treated workpiece, and keeps the temperature the regular hour；
S5, the workpiece through the second level step S4 means of isothermal quenching is put into spray hardening slot, spray quenching is carried out to workpiece
But, that is, the quenching technical is completed.
As optimal technical scheme, in step sl, the temperature in holding furnace is 780 DEG C -890 DEG C, and soaking time is
1.5h-4.5h。
As optimal technical scheme, in step s 2, the weight of the hierarchical quenching oil is 7 times -11 times of workpiece weight.
As optimal technical scheme, in step s 2, first order isothermal hardening makes the temperature of workpiece be down to 150 DEG C -210
DEG C, the time of first order isothermal hardening is 8min-10min.
As optimal technical scheme, in step s3, the holding temperature of holding furnace is 300 DEG C -420 DEG C, and soaking time is
15min-20min。
As optimal technical scheme, in step s 4, workpiece through second level isothermal hardening make workpiece temperature be down to 220 DEG C-
280℃。
As optimal technical scheme, in step s 5, the spray quenches cooling time for 10min-15min.
As optimal technical scheme, in step sl, hot extrusion is carried out to workpiece using extruder, will be squeezed using dragger
Workpiece after pressure is drawn to holding furnace.
Beneficial effects of the present invention：In the present invention, keep workpiece surface hardness uniformity good by quenching twice, quench-hardened case
It disclosure satisfy that requirement, reduce brittleness and further improve abrasion and corrosion resistance, and graduate quenching technical is not
The harmful substances such as a large amount of nitrite are will produce, low stain is safe and at low cost, and production efficiency is high；Workpiece is carried out twice
Drawing by high temperature makes workpiece make the thickness of workpiece thinning as possible under the premise of guarantee has high-tenacity, meets requirement, make
With the equipment lightweight of the carbon steel.
Description of the drawings
Fig. 1 is the carbon steel quenching technical flow chart described in the embodiment of the present invention.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of carbon steel quenching technical of the present invention, includes the following steps：
S1, workpiece is subjected to hot pressing stretching, the workpiece after hot pressing stretches enters insulation in holding furnace.
Specifically, hot extrusion is carried out to workpiece using extruder, after workpiece extruding is thinned to certain thickness, uses traction
Workpiece after extruding is stretched in holding furnace by machine, is kept the temperature or is heated and is kept the temperature, in holding furnace, by hot extrusion
Workpiece heat heat preservation afterwards is to 780 DEG C -890 DEG C, the when a length of 1.5h-4.5h of heat preservation.
Preferably, by the workpiece heat heat preservation after hot extrusion to 810 DEG C, when heat preservation a length of 2.3h, make workpiece austenite carbon
Saturation, during heat treatment, after chemical element component determination, austenitizing temperature is to influence workpiece elementary organization with the time
The principal element of performance, therefore, it is necessary to learn, suitable temperature and time ensures the good performance of workpiece.
S2, will through step S1, treated that workpiece is put into hierarchical quenching oil, carry out first order isothermal hardening.
Specifically, by step S1, treated that workpiece is put into hierarchical quenching oil, and the weight of hierarchical quenching oil is workpiece weight
7 times -11 times of amount, first order isothermal hardening make the temperature of workpiece be down to 150 DEG C -210 DEG C, and the time of first order quenching is
8min-10min。
Preferably, the weight of hierarchical quenching oil is 9 times of workpiece weight, and first order isothermal hardening makes the temperature of workpiece be down to
210 DEG C, the time of first order quenching is 8min.
After first order isothermal hardening, so that workpiece is stretched for next step and provide certain hardness and toughness, in this step
In rapid, choose temperature and time appropriate and have a great impact to the performance of carbon steel, workpiece is made to have certain processing performance.
S3, workpiece after step S2 processing is taken out from hierarchical quenching oil, is put into holding furnace and is kept the temperature, and is same
When to workpiece carry out straightening pull.
Specifically, after first order isothermal hardening, workpiece is taken out from quenching oil, be then placed in holding furnace into
Row heat preservation, or heating and thermal insulation is carried out, the holding temperature of holding furnace is 300 DEG C -420 DEG C, soaking time 15min-20min.
Preferably, the holding temperature of holding furnace is 340 DEG C, soaking time 18min, after keeping the temperature the regular hour, is made
Straightening pull is carried out to workpiece with stretching-machine, it is further that the thickness of workpiece is thinning, and when rational heating temperature and heat preservation
Between so that the toughness of workpiece is further improved.
S4, second level isothermal hardening will be carried out through step S3 treated workpiece, and keeps the temperature the regular hour.
Specifically, the workpiece after straightening pull is subjected to second level isothermal hardening, the temperature of workpiece is made to be down to 220 DEG C -280
DEG C, and keep the temperature 15min-20min.
Preferably, so that workpiece is down to 240 DEG C, and keep the temperature 20min, second level isothermal hardening makes workpiece surface form one layer
There is protective layer good antiseptic property, the setting of rational temperature to further improve the intensity and toughness of workpiece.
S5, the workpiece through the second level step S4 means of isothermal quenching is put into spray hardening slot, spray quenching is carried out to workpiece
But, that is, the quenching technical is completed.
Specifically, the workpiece after the isothermal hardening of the second level is put into spray hardening slot, workpiece is made to be quickly cooled down, sprayed
The time of quenching but is 10min-15min.
Preferably, spray quenches cooling time for 13min, after having cooled down, that is, completes the quenching technical, is quenched using this carbon steel
Technique keeps the case hardness uniformity of carbon steel good, and quench-hardened case disclosure satisfy that requirement, has certain hardness, toughness and resistance to
Corrosion resistance is ground, and hardness downward trend is gentle.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and it is pair to be not
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (8)
1. a kind of carbon steel quenching technical, which is characterized in that include the following steps：
S1, workpiece is subjected to hot pressing stretching, the workpiece after hot pressing stretches enters insulation in holding furnace；
S2, will through step S1, treated that workpiece is put into hierarchical quenching oil, carry out first order isothermal hardening；
S3, workpiece after step S2 processing is taken out from hierarchical quenching oil, is put into holding furnace and is kept the temperature, and is right simultaneously
Workpiece carries out straightening pull；
S4, second level isothermal hardening will be carried out through step S3 treated workpiece, and keeps the temperature the regular hour；
S5, the workpiece through the second level step S4 means of isothermal quenching is put into spray hardening slot, spray quenching is carried out but to workpiece, i.e.,
Complete the quenching technical.
2. carbon steel quenching technical according to claim 1, which is characterized in that in step sl, the temperature in holding furnace is
780 DEG C -890 DEG C, soaking time 1.5h-4.5h.
3. carbon steel quenching technical according to claim 1, which is characterized in that in step s 2, the hierarchical quenching oil
Weight is 7 times -11 times of workpiece weight.
4. carbon steel quenching technical according to claim 1, which is characterized in that in step s 2, first order isothermal hardening makes
The temperature of workpiece is down to 150 DEG C -210 DEG C, and the time of first order isothermal hardening is 8min-10min.
5. carbon steel quenching technical according to claim 1, which is characterized in that in step s3, the holding temperature of holding furnace
It is 300 DEG C -420 DEG C, soaking time 15min-20min.
6. carbon steel quenching technical according to claim 1, which is characterized in that in step s 4, workpiece is through second level isothermal
Quenching makes workpiece temperature be down to 220 DEG C -280 DEG C.
7. carbon steel quenching technical according to claim 1, which is characterized in that in step s 5, the spray is quenched cooling time
For 10min-15min.
8. carbon steel quenching technical according to claim 1, which is characterized in that in step sl, using extruder to workpiece
Hot extrusion is carried out, is drawn the workpiece after extruding to holding furnace using dragger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311881.7A CN108531691A (en) | 2018-04-09 | 2018-04-09 | A kind of carbon steel quenching technical |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810311881.7A CN108531691A (en) | 2018-04-09 | 2018-04-09 | A kind of carbon steel quenching technical |
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| Publication Number | Publication Date |
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| CN108531691A true CN108531691A (en) | 2018-09-14 |
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| CN201810311881.7A Withdrawn CN108531691A (en) | 2018-04-09 | 2018-04-09 | A kind of carbon steel quenching technical |
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| CN (1) | CN108531691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690868A (en) * | 2020-05-19 | 2020-09-22 | 赵纪明 | Isothermal quenching vermicular graphite cast iron and preparation method thereof |
-
2018
- 2018-04-09 CN CN201810311881.7A patent/CN108531691A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690868A (en) * | 2020-05-19 | 2020-09-22 | 赵纪明 | Isothermal quenching vermicular graphite cast iron and preparation method thereof |
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Application publication date: 20180914 |