CN104831021A - Process method for crystalline grain induction quenching and refining - Google Patents
Process method for crystalline grain induction quenching and refining Download PDFInfo
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- CN104831021A CN104831021A CN201510235142.0A CN201510235142A CN104831021A CN 104831021 A CN104831021 A CN 104831021A CN 201510235142 A CN201510235142 A CN 201510235142A CN 104831021 A CN104831021 A CN 104831021A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention provides a process method for crystalline grain induction quenching and refining. The process method comprises the following steps: a clamp and a matched screw cap are processed, wherein the clamp comprises a lathe clamping end, a retracting part, a mandrel and the matched screw cap, the lathe clamping end is a cylinder with the length being 30-70mm and the diameter being 40-50mm, the retracting part is cylinder with the length being 11-14mm and the diameter smaller than the outer diameter D of a threaded tube by 11-13 mm, one end of the mandrel is a cylinder with a smooth surface, and a cylinder with threads on surface is arranged at the other end of the mandrel, the diameter of the mandrel is smaller than the inner diameter d of the threaded tube by 0.02-0.04mm, the length of the cylinder with the smooth surface is the product of the quantity of components needing to be subjected to once clamping and component thickness, and the length of the cylinder with threads on surface is 40-60mm; and the lathe clamping end and the retracting part are processed. According to the process method for crystalline grain induction quenching and refining disclosed by the invention, the processing efficiency is high, material waste is avoided, and the qualified rate is high.
Description
Technical field
The present invention relates to the processing method of a kind of crystal grain induction quenching refinement, belong to field of mechanical technique.
Background technology
In hot-work field, crystal grain thinning is a kind of effective means improving ferrous materials performance.The size of crystal grain and grain fineness number, have a great impact the mechanical property of ferrous materials; No matter for carbon steel or steel alloy, in most cases all wish to obtain close grain, because crystal grain is more tiny under normal temperature, intensity, hardness are higher, and plasticity, impelling strength are better simultaneously, and wear resistance is higher.The siliconized plate being used to manufacture motor and transformer comparatively made an exception, people often wish to obtain thick crystal grain makes that its magnetic hysteresis loss is little, effect is high.The method of common crystal grain thinning has the increase condensate depression of casting field, Metamorphism treatment and mechanical vibration to stir, and also has the deformation process refinement, physical field refinement etc. of many scholars and technician's report.But heat treating method particularly induction heat treatment crystal grain thinning rarely has disclosure.
Summary of the invention
The invention provides the processing method of a kind of crystal grain induction quenching refinement, the above defect can be overcome.
For solving above technical problem, the invention provides following technical scheme: the processing method of a kind of crystal grain induction quenching refinement, comprises the following steps:
1) workpiece preheating in the inductor block of ring-type; Workpiece is herein carbon steel or steel alloy, and preheating temperature is carbon steel 330 ~ 370 DEG C, steel alloy 390 ~ 410 DEG C;
2) carry out induction quenching immediately after preheating, in heating quenching process, heat Liquid injection cooling; The cooling fluid of ejection has certain pressure;
Steel is heated to a certain temperature of AC3 by room temperature, conventional quenching lowest temperature, austenitizing is carried out in short period of time insulation at this temperature, and then quench cooled is to room temperature;
Repeatedly induction quenching is carried out to workpiece, adopts laser heating, and immediately to the position water-spraying control after heating, cooling at once after quenching; Induction quenching terminates to take low-temperaturetempering to workpiece afterwards, and the final hardness that tempering temperature need require according to workpiece be determined, and takes low temperature 180 ~ 210 DEG C of tempering;
Inductor block does moving downward relative to workpiece along axis of workpiece, and inductor block does moving upward relative to workpiece along axis of workpiece; Described inductor block has the heating collar of upper and lower two-layer mutually through hollow structure, described heating collar is connected at least three liquid-inlet pipes, the through heating collar of described liquid-inlet pipe, the heating collar inner edge of described lower floor is axially laid with the spray hole had angle with heating collar axis, when inductor block moves upward, elder generation is by two-layer heating collar to workpiece induction heating, and supply cooling fluid, makes the complete position of heating at once can carry out Liquid injection cooling by spray hole;
The spacing of described adjacent spray hole is 1.5 ~ 2.5 times of spray hole aperture.
The invention has the beneficial effects as follows: steel is heated to conventional quenching lowest temperature by room temperature by the present invention, austenitizing is carried out in short period of time insulation at this temperature, then rapid quenching is cooled to room temperature, because under the effect of recrystallize Austenite Grain Refinement and rapid heating situation, ferrite crystal grain changes as the tendency of multiple austenite crystal, make the remarkable refinement of crystal grain; Rapid heating and cooling are carried out to steel part simultaneously, can nuclei growth be suppressed, thus obtain tiny austenitic grain structure.
Embodiment
A processing method for crystal grain induction quenching refinement, comprises the following steps:
1) workpiece preheating in the inductor block of ring-type; Workpiece is herein carbon steel or steel alloy, and preheating temperature is carbon steel 330 ~ 370 DEG C, steel alloy 390 ~ 410 DEG C;
2) carry out induction quenching immediately after preheating, in heating quenching process, heat Liquid injection cooling; The cooling fluid of ejection has certain pressure;
Steel is heated to a certain temperature of AC3 by room temperature, conventional quenching lowest temperature, austenitizing is carried out in short period of time insulation at this temperature, and then quench cooled is to room temperature;
Repeatedly induction quenching is carried out to workpiece, adopts laser heating, and immediately to the position water-spraying control after heating, cooling at once after quenching; Induction quenching terminates to take low-temperaturetempering to workpiece afterwards, and the final hardness that tempering temperature need require according to workpiece be determined, and takes low temperature 180 ~ 210 DEG C of tempering;
Inductor block does moving downward relative to workpiece along axis of workpiece, and inductor block does moving upward relative to workpiece along axis of workpiece; Described inductor block has the heating collar of upper and lower two-layer mutually through hollow structure, described heating collar is connected at least three liquid-inlet pipes, the through heating collar of described liquid-inlet pipe, the heating collar inner edge of described lower floor is axially laid with the spray hole had angle with heating collar axis, when inductor block moves upward, elder generation is by two-layer heating collar to workpiece induction heating, and supply cooling fluid, makes the complete position of heating at once can carry out Liquid injection cooling by spray hole;
The spacing of described adjacent spray hole is 1.5 ~ 2.5 times of spray hole aperture.
The invention has the beneficial effects as follows: steel is heated to conventional quenching lowest temperature by room temperature by the present invention, austenitizing is carried out in short period of time insulation at this temperature, then rapid quenching is cooled to room temperature, because under the effect of recrystallize Austenite Grain Refinement and rapid heating situation, ferrite crystal grain changes as the tendency of multiple austenite crystal, make the remarkable refinement of crystal grain; Rapid heating and cooling are carried out to steel part simultaneously, can nuclei growth be suppressed, thus obtain tiny austenitic grain structure.
Embodiment of the present invention does not form the restriction to the application's scope; within every spirit in the present invention's design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection scope of the present invention.
Claims (1)
1. a processing method for crystal grain induction quenching refinement, is characterized in that, comprises the following steps:
1) workpiece preheating in the inductor block of ring-type; Workpiece is herein carbon steel or steel alloy, and preheating temperature is carbon steel 330 ~ 370 DEG C, steel alloy 390 ~ 410 DEG C;
2) carry out induction quenching immediately after preheating, in heating quenching process, heat Liquid injection cooling; The cooling fluid of ejection has certain pressure;
Steel is heated to a certain temperature of AC3 by room temperature, conventional quenching lowest temperature, austenitizing is carried out in short period of time insulation at this temperature, and then quench cooled is to room temperature;
Repeatedly induction quenching is carried out to workpiece, adopts laser heating, and immediately to the position water-spraying control after heating, cooling at once after quenching; Induction quenching terminates to take low-temperaturetempering to workpiece afterwards, and the final hardness that tempering temperature need require according to workpiece be determined, and takes low temperature 180 ~ 210 DEG C of tempering;
Inductor block does moving downward relative to workpiece along axis of workpiece, and inductor block does moving upward relative to workpiece along axis of workpiece; Described inductor block has the heating collar of upper and lower two-layer mutually through hollow structure, described heating collar is connected at least three liquid-inlet pipes, the through heating collar of described liquid-inlet pipe, the heating collar inner edge of described lower floor is axially laid with the spray hole had angle with heating collar axis, when inductor block moves upward, elder generation is by two-layer heating collar to workpiece induction heating, and supply cooling fluid, makes the complete position of heating at once can carry out Liquid injection cooling by spray hole;
The spacing of described adjacent spray hole is 1.5 ~ 2.5 times of spray hole aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510235142.0A CN104831021A (en) | 2015-05-11 | 2015-05-11 | Process method for crystalline grain induction quenching and refining |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510235142.0A CN104831021A (en) | 2015-05-11 | 2015-05-11 | Process method for crystalline grain induction quenching and refining |
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| CN104831021A true CN104831021A (en) | 2015-08-12 |
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| CN201510235142.0A Pending CN104831021A (en) | 2015-05-11 | 2015-05-11 | Process method for crystalline grain induction quenching and refining |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19915264C1 (en) * | 1999-04-03 | 2000-06-21 | Daimler Chrysler Ag | Hollow workpiece, especially a vehicle transmission component e.g. a joint housing, is induction surface hardened by lowering an inductor and an overhead quench nozzle relative to the workpiece wall |
| CN201610923U (en) * | 2010-01-08 | 2010-10-20 | 北京中技克美谐波传动有限责任公司 | Double speed ratio harmonic drive reducer |
| CN202576485U (en) * | 2012-05-19 | 2012-12-05 | 西安煤矿机械有限公司 | Rack rail wheel single-tooth quenching inductor |
| CN104357621A (en) * | 2014-10-22 | 2015-02-18 | 广州市机电工业研究所 | Process method for grain refinement by induction quenching |
-
2015
- 2015-05-11 CN CN201510235142.0A patent/CN104831021A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19915264C1 (en) * | 1999-04-03 | 2000-06-21 | Daimler Chrysler Ag | Hollow workpiece, especially a vehicle transmission component e.g. a joint housing, is induction surface hardened by lowering an inductor and an overhead quench nozzle relative to the workpiece wall |
| CN201610923U (en) * | 2010-01-08 | 2010-10-20 | 北京中技克美谐波传动有限责任公司 | Double speed ratio harmonic drive reducer |
| CN202576485U (en) * | 2012-05-19 | 2012-12-05 | 西安煤矿机械有限公司 | Rack rail wheel single-tooth quenching inductor |
| CN104357621A (en) * | 2014-10-22 | 2015-02-18 | 广州市机电工业研究所 | Process method for grain refinement by induction quenching |
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Application publication date: 20150812 |
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| RJ01 | Rejection of invention patent application after publication |