CN105112848A - Technological method for salt-melting and metal-penetrating technology - Google Patents
Technological method for salt-melting and metal-penetrating technology Download PDFInfo
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- CN105112848A CN105112848A CN201510510352.6A CN201510510352A CN105112848A CN 105112848 A CN105112848 A CN 105112848A CN 201510510352 A CN201510510352 A CN 201510510352A CN 105112848 A CN105112848 A CN 105112848A
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Abstract
The invention provides a technological method for a salt-melting and metal-penetrating technology. The technological method comprises 15 steps; a specific application process for the salt-melting and metal-penetrating technology in a production process is divided into early-stage treatment, chemical reduction and after-treatment. According to the technical scheme adopted by the invention, the application effect of the salt-melting and metal-penetrating technology is maximized; moreover, a product subjected to salt-melting and metal-penetrating treatment can be consistent with a standard workpiece in dimension, so that the product can be perfectly applied to the original environment while other matching products are not required to modify.
Description
[
technical field]
The present invention relates to heat-treatment technology method, particularly relate to a kind of processing method of molten salt diffusion metallizing technology.
[
background technology]
In order to improve smooth finish and hardness, or even the wearing and tearing of repair products, usually use heat treatment technics, common heat treatment technics has PVD, CVD, PCVD, TD method, wherein TD method is also molten salt diffusion metallizing technology, it is domestic newer technology, effect after its process is also best, due to the technology that it is newer, a lot of research also rests on its core technology-chemical reduction procedure, lack reasonably in actual applications, comprehensive processing method, and the disappearance for the treatment of process before chemical reduction procedure will reduce the effect of molten salt diffusion metallizing technology, the disappearance of the treatment process after chemical reduction procedure singly can not reduce the effect of molten salt diffusion metallizing technology, also can affect the use of specific product.
[
summary of the invention]
The invention provides the processing method of the strong comprehensive molten salt diffusion metallizing technology of a kind of logicality, be intended to solve molten salt diffusion metallizing technique effect can not maximize, process after product generation different from original product index problem.
The technical solution used in the present invention is: a kind of processing method of molten salt diffusion metallizing technology, comprises step:
A. workpiece income checks: check after taking in pending workpiece, check comprise visual inspection, material status detects, hardness determination before thermal treatment, carries out record of search table;
B. polishing: according to record of search table determination polishing work amount, adopt 80#, 180#, 240#, 320#, 420#, 600# sand paper to carry out polishing successively, remove the scum silica frost of workpiece surface, make face surface bright and clean, surfaceness is lower than 0.8 μm;
C. dress hangs: the workpiece after polishing is carried out dress and hangs, be convenient to subsequent operations;
D. preheating: the workpiece that dress hangs is lifted up in preheating oven and carries out preheating;
E. chemical reduction: add and change material, lower than change material fusing point temperature under carry out chemical reduction reaction, obtain the workpiece after molten salt diffusion metallizing;
F. quench: the workpiece after molten salt diffusion metallizing is carried out quench treatment;
G. clean: the residual salt of cleaning matrix surface;
H. tempering: carry out temper;
I. clean: workpiece is put into boiling water, remove the residual salt of surface residual;
J. polishing: first carry out surface finish with sand paper, workpiece surface residue is cleared up, then carry out polished finish with wool wheel and lapping paste;
K. detect: hardness is carried out to the workpiece after process, leather film thickness, size detect, carry out detection record;
L. tolerance adjustment: according to detection record and standard workpiece contrast, if find size deviation, distortion, use correction station is corrected;
M. provide examining report: the workpiece after adjusting tolerance detects and provides examining report, this report content comprises workpiece effect before and after treatment, and effect comprises the thickness of the size report of workpiece, Vickers' hardness, plated film;
N. pack: employing structure is fixed, pad the mode of putting snubber block packs;
O. pay: the outbound flow process that packaged product specifies according to quality system is completed payment.
The present invention further technical scheme is: visual inspection described in steps A comprises workpiece working face welding, vestige of damaging.
The present invention further technical scheme is: material status described in steps A comprises the material status of workpiece main body, each position, hole.
The invention has the beneficial effects as follows: pass through technique scheme, by reasonably improving the core of molten salt diffusion metallizing technology--the process in early stage of chemical reduction step and post-processed, the effect of molten salt diffusion metallizing technology is made to reach maximization, and the product after molten salt diffusion metallizing process can with standard workpiece consistent size, can perfectly be applied in former environment, without the need to revising other auxiliary products.
[
accompanying drawing explanation]
Fig. 1 is the process flow sheet of molten salt diffusion metallizing technology of the present invention.
[
embodiment]
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
As shown in Figure 1, a kind of processing method of molten salt diffusion metallizing technology, comprises step:
A. workpiece income checks: check after taking in pending workpiece, check comprise visual inspection, material status detects, hardness determination before thermal treatment, carries out record of search table; Described visual inspection comprises workpiece working face welding, vestige of damaging; As found, outward appearance damages serious situation, communicates with client in time.Described material status comprises the material of the positions, hole such as workpiece main body, each screw hole, pilot hole, pin hole, material status monitoring must reach the treatment condition of molten salt diffusion metallizing, if material is not up to standard likely will cause this burn into fusing of position, hole, oxidations etc., if find, situation not up to standard notifies that client processes the hidden danger of rear existence in time; Described hardness determination and HRC detect, guarantee that the requirements processed the early stage that workpiece does chemical reduction process is up to standard, if there is not meeting the requirement of a certain step, should take to skip this step or reduce the measure that this step process requires, and make a record, notify client in time;
B. polishing: according to the check result determination polishing work amount of steps A, adopt 80#, 180#, 240#, 320#, 420#, 600# sand paper to carry out polishing successively, remove the scum silica frost of workpiece surface, make face surface bright and clean, surfaceness is lower than 0.8 μm; Some are unfavorable for the scum silica frost of chemical reduction reaction to remove surface, make the more bright and clean contact being conducive to chemical reduction reaction thing in surface, can make chemical reduction better effects if like this, react more stable.
C. dress hangs: the workpiece after polishing is carried out dress and hangs, be convenient to subsequent operations, because molten salt diffusion metallizing technology is usually used in the process of relatively large workpiece, such as vapour accessory die etc., this class workpiece has the feature that weight and volume is comparatively large, can not damage simultaneously, therefore take to fill the technique of hanging, be not only simple saving artificial, while topmost object or convenient operation, avoid carry damage.
D. preheating, in case chemical reduction procedure workpiece heats up produce distortion too soon; Preheating is lifted up in preheating oven by the workpiece that dress hangs to carry out preheating, and temperature sets according to material size and material, normal preheating temperature 400
oc-500
oc.
E. chemical reduction: add and change material, lower than change material fusing point temperature under carry out chemical reduction reaction, obtain the workpiece after molten salt diffusion metallizing; Workpiece after molten salt diffusion metallizing is divided into two-layer, and bottom is matrix, and upper strata is overlay film, the hardness of matrix is more than or equal to former workpiece hardness, the hardness of overlay film and smooth finish, much larger than the hardness of workpiece far away and smooth finish, make the workpiece after processing durable in use, and can repair the workpiece having damage.
F. quench: the workpiece after molten salt diffusion metallizing is carried out quench treatment; Quenching method is selected according to concrete workpiece material, and object makes matrix obtain sclerosis, improves its metallicity.
G. clean: the residual salt of cleaning matrix surface, guarantee the surface clearness of later stage workpiece.This step is after quench treatment, and treat the laggard line operate of workpiece air cooling, mainly clear up the residual salt of workpiece surface, residual salt is more difficult to be removed, and therefore should to carry out cleaning in early stage before tempering, guarantees that later stage residual salt cleaning is more clean.
H. tempering: carry out temper.After this tempering step and normal quenching, tempering is principle of uniformity.Organize extremely unstable due to quenching workpiece, internal stress and fragility are all very large.Therefore in order to eliminate internal stress, obtaining the mechanical property of stable tissue, size and requirement, therefore must temper be carried out.
I. clean: workpiece is put into boiling water, remove the residual salt of surface residual.
J. polishing: first carry out surface finish with sand paper, workpiece surface residue is cleared up, then carry out polished finish with wool wheel and lapping paste.
K. detect: hardness is carried out to the workpiece after process, leather film thickness, size detect, carry out detection record.
L. tolerance adjustment: according to detection record and standard workpiece contrast, if find size deviation, distortion, use correction station is corrected.
M. examining report is provided: the workpiece after adjusting tolerance detects and provides examining report.This report content mainly comprises the size report of client's workpiece, Vickers' hardness, thickness and workpiece effect report before and after treatment.
N. pack: employing structure is fixed, pad the mode of putting snubber block packs.
O. pay: the outbound flow process that packaged product specifies according to quality system is completed payment.
Molten salt diffusion metallizing technology refers to chemical reduction procedure, the embody rule technique of molten salt diffusion metallizing technology in production process is divided into process in early stage, chemical reduction, post-processed by the present invention, pass through technique scheme, the effect of molten salt diffusion metallizing technology is made to reach maximization, and the product after molten salt diffusion metallizing process can with standard workpiece consistent size, can perfectly be applied in former environment, without the need to revising other auxiliary products.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a processing method for molten salt diffusion metallizing technology, is characterized in that, comprises step:
A. workpiece income checks: check after taking in pending workpiece, check comprise visual inspection, material status detects, hardness determination before thermal treatment, carries out record of search table;
B. polishing: according to record of search table determination polishing work amount, adopt 80#, 180#, 240#, 320#, 420#, 600# sand paper to carry out polishing successively, remove the scum silica frost of workpiece surface, make face surface bright and clean, surfaceness is lower than 0.8 μm;
C. dress hangs: the workpiece after polishing is carried out dress and hangs, be convenient to subsequent operations;
D. preheating: the workpiece that dress hangs is lifted up in preheating oven and carries out preheating;
E. chemical reduction: add and change material, lower than change material fusing point temperature under carry out chemical reduction reaction, obtain the workpiece after molten salt diffusion metallizing;
F. quench: the workpiece after molten salt diffusion metallizing is carried out quench treatment;
G. clean: the residual salt of cleaning matrix surface;
H. tempering: carry out temper;
I. clean: workpiece is put into boiling water, remove the residual salt of surface residual;
J. polishing: first carry out surface finish with sand paper, workpiece surface residue is cleared up, then carry out polished finish with wool wheel and lapping paste;
K. detect: hardness is carried out to the workpiece after process, leather film thickness, size detect, carry out detection record;
L. tolerance adjustment: according to detection record and standard workpiece contrast, if find size deviation, distortion, use correction station is corrected;
M. provide examining report: the workpiece after adjusting tolerance detects and provides examining report, this report content comprises workpiece effect before and after treatment, and effect comprises the thickness of the size report of workpiece, Vickers' hardness, plated film;
N. pack: employing structure is fixed, pad the mode of putting snubber block packs;
O. pay: the outbound flow process that packaged product specifies according to quality system is completed payment.
2. the processing method of molten salt diffusion metallizing technology as claimed in claim 1, is characterized in that: visual inspection described in steps A comprises workpiece working face welding, vestige of damaging.
3. the processing method of molten salt diffusion metallizing technology as claimed in claim 1, is characterized in that: material status described in steps A comprises the material status of workpiece main body, each position, hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510510352.6A CN105112848A (en) | 2015-08-19 | 2015-08-19 | Technological method for salt-melting and metal-penetrating technology |
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| CN201510510352.6A CN105112848A (en) | 2015-08-19 | 2015-08-19 | Technological method for salt-melting and metal-penetrating technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676461A (en) * | 2016-11-29 | 2017-05-17 | 河南科技大学 | Micro-alloyed rare earth treated steel for high speed railway and preparation process of micro-alloyed rare earth treated steel |
| CN108531853A (en) * | 2018-06-01 | 2018-09-14 | 南京联塑科技实业有限公司 | A kind of QPQ salt bath processing methods suitable for die surface processing |
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| KR20040099994A (en) * | 2003-05-21 | 2004-12-02 | 현대자동차주식회사 | Sample manufacturing method for austenite grain size measurement of chrome-molybdenum alloy steel |
| CN102877071A (en) * | 2012-09-25 | 2013-01-16 | 黄遥泉 | Novel heat chemical treatment process for TD punch |
| CN103866221A (en) * | 2014-04-01 | 2014-06-18 | 焦作市华科液压机械制造有限公司 | Remanufacturing process for piston rod of supporting type coal mine hydraulic support through induction, preheating and cladding |
| CN104128594A (en) * | 2014-07-08 | 2014-11-05 | 江苏海纬集团有限公司 | Carbon steel casting |
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2015
- 2015-08-19 CN CN201510510352.6A patent/CN105112848A/en active Pending
Patent Citations (5)
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| KR20040099994A (en) * | 2003-05-21 | 2004-12-02 | 현대자동차주식회사 | Sample manufacturing method for austenite grain size measurement of chrome-molybdenum alloy steel |
| CN102877071A (en) * | 2012-09-25 | 2013-01-16 | 黄遥泉 | Novel heat chemical treatment process for TD punch |
| WO2014048200A1 (en) * | 2012-09-25 | 2014-04-03 | Huang Yaoquan | New thermochemical treatment process for td punch pin |
| CN103866221A (en) * | 2014-04-01 | 2014-06-18 | 焦作市华科液压机械制造有限公司 | Remanufacturing process for piston rod of supporting type coal mine hydraulic support through induction, preheating and cladding |
| CN104128594A (en) * | 2014-07-08 | 2014-11-05 | 江苏海纬集团有限公司 | Carbon steel casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676461A (en) * | 2016-11-29 | 2017-05-17 | 河南科技大学 | Micro-alloyed rare earth treated steel for high speed railway and preparation process of micro-alloyed rare earth treated steel |
| CN108531853A (en) * | 2018-06-01 | 2018-09-14 | 南京联塑科技实业有限公司 | A kind of QPQ salt bath processing methods suitable for die surface processing |
| CN108531853B (en) * | 2018-06-01 | 2020-06-05 | 南京联塑科技实业有限公司 | QPQ salt bath treatment method suitable for mold surface treatment |
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