CN109760715A - Goat latch hook and its heat treatment process - Google Patents
Goat latch hook and its heat treatment process Download PDFInfo
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- CN109760715A CN109760715A CN201811606167.7A CN201811606167A CN109760715A CN 109760715 A CN109760715 A CN 109760715A CN 201811606167 A CN201811606167 A CN 201811606167A CN 109760715 A CN109760715 A CN 109760715A
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- Prior art keywords
- latch hook
- treatment process
- layer
- anticorrosion antiwear
- heat treatment
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Abstract
The disclosure is directed to a kind of goat latch hook and its heat treatment process, which includes latch hook ontology, which forms anticorrosion antiwear layer through nitriding heat treatment process.The anticorrosion antiwear performance of latch hook can be improved in the disclosure, prolongs its service life, and then avoids jeopardizing the factor of traffic safety, improves train traffic safety.
Description
Technical field
This disclosure relates to goat components manufacturing technology field more particularly to a kind of goat latch hook and its heat treatment work
Skill.
Background technique
Goat is widely used on domestic railway switch, the latch hook of the important spare part as locking device for switch machine, one
As work in the adverse circumstances such as field, wind and weather easily corrodes and exists abrasion, and service life reduces, jeopardizes there are potential
The problem of traffic safety.Therefore, it is necessary to which providing a kind of new technical solution improves present in above scheme one or more
A problem.
Summary of the invention
The disclosure is designed to provide a kind of goat latch hook and its heat treatment process, and then at least to a certain extent
Overcome the problems, such as caused by the limitation and defect due to the relevant technologies one or more.
The embodiment of the present disclosure provides a kind of goat latch hook, including latch hook ontology, the latch hook body surface through nitriding heat at
Science and engineering skill forms anticorrosion antiwear layer.
In embodiment of the disclosure, the latch hook ontology is forged by substrate, normalizing, quenched formation, and hardness be 190~
200HB。
In embodiment of the disclosure, the substrate material of the latch hook ontology is 45 steel.
In embodiment of the disclosure, the anticorrosion antiwear layer from outward appearance to inner essence successively includes compound layer and diffusion layer.
In embodiment of the disclosure, the anticorrosion antiwear layer includes at least nitride tissue, carbide tissue and oxide
One or more of tissue.
In embodiment of the disclosure, the nitriding heat treatment process is liquid ions Nitrizing Treatment technique.
The embodiment of the present disclosure also provides a kind of goat latch hook surface heat treatment process, comprising:
One substrate is provided, which is successively forged, normalizing and modifier treatment form latch hook ontology；
Liquid ions Nitrizing Treatment is carried out to the latch hook body surface and forms anticorrosion antiwear layer.
In embodiment of the disclosure, the latch hook ontology hardness is 190~200HB.
In embodiment of the disclosure, the anticorrosion antiwear layer from outward appearance to inner essence successively includes compound layer and diffusion layer.
In embodiment of the disclosure, the anticorrosion antiwear layer includes at least nitride tissue, carbide tissue and oxide
One or more of tissue.
The technical scheme provided by this disclosed embodiment can include the following benefits:
In embodiment of the disclosure, nitriding heat treatment process is carried out in latch hook body surface and forms anticorrosion antiwear layer, thus
The anticorrosion antiwear performance for improving latch hook, prolongs its service life, and then avoid jeopardizing the factor of traffic safety, improves train travel
Safety.
Detailed description of the invention
Fig. 1 shows latch hook schematic diagram in disclosure exemplary embodiment；
Fig. 2 shows goat latch hook surface heat treatment process flow diagrams in the embodiment of the present disclosure.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, knot
Structure or characteristic can be incorporated in any suitable manner in one or more embodiments.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.Identical attached drawing mark in figure
Note indicates same or similar part, thus will omit repetition thereof.Some block diagrams shown in the drawings are function
Energy entity, not necessarily must be corresponding with physically or logically independent entity.
A kind of goat latch hook is provided firstly in this example embodiment, which may include latch hook ontology, show
Structure of anticipating is as shown in fig. 1, and the structure of latch hook specifically refers to the prior art, such as Authorization Notice No. is CN201501410U's
Patent document.In the present embodiment, which forms anticorrosion antiwear layer through nitriding heat treatment process.Current latch hook is raw
It is not related to this Nitrizing Treatment in production, the anticorrosion antiwear performance of latch hook can be improved in this way, prolong its service life, and then keep away
Exempt from or even substantially eliminate the factor for jeopardizing traffic safety.
Specifically, in embodiment of the disclosure, the substrate material of the latch hook ontology can be 45 steel, certain and unlimited
In this.The latch hook ontology forged, normalizing, quenched formation by substrate such as 45 steel, and hardness is 190~200HB.Preferably,
The hardness can be 195~200HB, to improve the effect of subsequent Nitrizing Treatment.
In an embodiment of the disclosure, after forged, normalizing, modifier treatment, this is formed in using nitriding heat treatment
The anticorrosion antiwear layer of latch hook body surface from outward appearance to inner essence can successively include compound layer and diffusion layer.Further, exist
In one embodiment of the disclosure, the anticorrosion antiwear layer at least may include nitride tissue, carbide tissue and oxide group
One or more of knit.For example, the compound layer may include Fe2N、Fe3N、Fe4N、Fe3C、Fe3O4Compound tissue
Deng.This makes latch hook ontology have good wear-resisting and antiseptic property, and not only itself is wear-resisting, but also there is good anti-attrition to make
With the further service life for extending latch hook.
Specifically, in embodiment of the disclosure, the nitriding heat treatment process is liquid ions Nitrizing Treatment technique, can be with
The following steps are included:
Oil removing cleaning, rinsing, drying and processing are carried out to latch hook body surface；
The pre-heat treatment: latch hook ontology is preheated into 30~100min in the air resistance furnace that temperature is 200~450 DEG C；
Liquid ions Nitrizing Treatment: latch hook ontology is immersed in CNO-1The fuse salt that mass of ion score is 28%~40%
It is middle to be heated stage by stage, to form anticorrosion antiwear nitration case；
Passive oxidation processing: latch hook ontology is handled into 10~40min in the salt bath furnace that temperature is 200~400 DEG C；
Low temperature aging processing: latch hook ontology is handled 3~5 hours in the air resistance furnace that temperature is 150~200 DEG C.
Specifically, first having to first in latch hook body surface progress oil removing cleaning, rinsing, drying and processing step to described
Latch hook ontology checked, check for damaging, oxide skin the case where, however it is clear to carry out conventional oil removing respectively to its surface again
It washes, rinse, drying and processing, to remove the surface smut for hindering subsequent liquid glow discharge nitriding technique.
In the pre-heat treatment step, directly latch hook ontology is put into the air resistance furnace that temperature is 200~450 DEG C and preheats 30
~100min, the preferably temperature range can be 210~400 DEG C, and the time can be 40~90min, more preferably the temperature
It may range from 240~370 DEG C, the time can be 45~80min, and the purpose of the step is to improve the latch hook body surface
Activity.
In liquid ions nitridation steps, latch hook ontology is immersed in CNO-1Mass of ion score be 28%~40% it is molten
Melt in salt and is heated stage by stage.It is 30~120min that first heating period temperature, which is 400~550 DEG C of times, preferably
The temperature range can be 410~520 DEG C, and the time can be 30~110min, which can further improve the latch hook sheet
Body surface-active.It is 30~120min that second heating period temperature, which is 500~700 DEG C of times, and the preferably temperature range can be with
It is 530~610 DEG C, the time can be 30~110min, and after second heating period, the latch hook body surface can shape
At anticorrosion antiwear layer, the anticorrosion antiwear layer may include compound layer and diffusion layer, such as the body diffused layer of Ovshinsky containing N.It is described
Compound layer with a thickness of 10~50 μm, the body diffused layer of Ovshinsky containing N with a thickness of 0.2~0.4mm, wherein the chemical combination
Nitride layer includes Fe2N、Fe3N、Fe4N、Fe3At least one of C or a variety of.
In one embodiment, the fuse salt is mixing finished product salt, and the present invention does not do the specific ingredient of the fuse salt
Limitation need to only guarantee CNO-1Mass of ion score is 28%~40%, works as CNO-1Mass of ion score is 28%~40%
When, latch hook body surface has high N gesture, can accelerate nitriding speed and deepen nitriding thickness.In a specific embodiment,
The characteristics of liquid ions nitridation steps carry out in mid-frequency induction heating liquid ions nitriding furnace, the heating furnace is heating
Speed is fast, fuse salt temperature is uniform, wherein the flue of the mid-frequency induction heating liquid ions nitriding furnace uses stainless steel/pure titanium
Clad steel plate, to guarantee the purity of fuse salt.
Latch hook ontology is handled 10~40min by passive oxidation processing step in the salt bath furnace that temperature is 200~400 DEG C,
Preferably the temperature range can be 230~350 DEG C, and the time can be 15~28min, on the one hand which can close latch hook
Body surface gap, and Fe especially wear-resisting, with preferable corrosion resistance is formed in latch hook body surface3O4Compound layer, separately
On the one hand the process thoroughly neutralizes and has decomposed CNO-1Ion, to realize environmentally friendly production.
Low temperature aging processing step, by latch hook ontology, processing 3~5 is small in the air resistance furnace that temperature is 150~200 DEG C
When, preferably the temperature range can be 150~180 DEG C, and the time can be 3~4.5 hours, this step makes anticorrosion antiwear nitrogen
It is more uniform to change layer, further improves surface hardness, antiseptic property and the wear-resisting property of the latch hook ontology.
In above-described embodiment of the disclosure, nitriding heat treatment process is carried out in latch hook body surface and forms anticorrosion antiwear layer,
It to improve the anticorrosion antiwear performance of latch hook, prolongs its service life, and then avoid jeopardizing the factor of traffic safety, improves train
Travel safety.
As shown in Fig. 2, the embodiment of the present disclosure also provides a kind of goat latch hook surface heat treatment process, which be can wrap
Include following steps:
Step S101: providing a substrate, is successively forged to the substrate, normalizing and modifier treatment form latch hook ontology.
Specifically, the substrate can be 45 steel, 45 steel are forged, normalizing, modifier treatment form latch hook ontology, wherein forging
Shown in structural reference Fig. 1~2 for making the molding latch hook ontology.In addition, the hardness of the latch hook ontology can for 190~
200HB.Preferably, the hardness can be 220~240HB, to improve the effect of subsequent Nitrizing Treatment.
Step S102: liquid ions Nitrizing Treatment is carried out to the latch hook body surface and forms anticorrosion antiwear layer.
Specifically, as an example, which may comprise steps of:
Oil removing cleaning, rinsing, drying and processing are carried out to latch hook body surface；
The pre-heat treatment: latch hook ontology is preheated into 30~100min in the air resistance furnace that temperature is 200~450 DEG C；
Liquid ions Nitrizing Treatment: latch hook ontology is immersed in CNO-1The fuse salt that mass of ion score is 28%~40%
It is middle to be heated stage by stage, to form anticorrosion antiwear nitration case；
Passive oxidation processing: latch hook ontology is handled into 10~40min in the salt bath furnace that temperature is 200~400 DEG C；
Low temperature aging processing: latch hook ontology is handled 3~5 hours in the air resistance furnace that temperature is 150~200 DEG C.
Specifically, first having to first in latch hook body surface progress oil removing cleaning, rinsing, drying and processing step to described
Latch hook ontology checked, check for damaging, oxide skin the case where, however it is clear to carry out conventional oil removing respectively to its surface again
It washes, rinse, drying and processing, to remove the surface smut for hindering subsequent liquid glow discharge nitriding technique.
In the pre-heat treatment step, directly latch hook ontology is put into the air resistance furnace that temperature is 200~450 DEG C and preheats 30
~100min, the preferably temperature range can be 210~400 DEG C, and the time can be 40~90min, more preferably the temperature
It may range from 240~370 DEG C, the time can be 45~80min, and the purpose of the step is to improve the latch hook body surface
Activity.
In liquid ions nitridation steps, latch hook ontology is immersed in CNO-1Mass of ion score be 28%~40% it is molten
Melt in salt and is heated stage by stage.It is 30~120min that first heating period temperature, which is 400~550 DEG C of times, preferably
The temperature range can be 410~520 DEG C, and the time can be 30~110min, which can further improve the latch hook sheet
Body surface-active.It is 30~120min that second heating period temperature, which is 500~700 DEG C of times, and the preferably temperature range can be with
It is 530~610 DEG C, the time can be 30~110min, and after second heating period, the latch hook body surface can shape
At anticorrosion antiwear layer, the anticorrosion antiwear layer may include compound layer and diffusion layer, such as the body diffused layer of Ovshinsky containing N.It is described
Compound layer with a thickness of 10~50 μm, the body diffused layer of Ovshinsky containing N with a thickness of 0.2~0.4mm, wherein the chemical combination
Nitride layer includes Fe2N、Fe3N、Fe4N、Fe3At least one of C or a variety of.
In one embodiment, the fuse salt is mixing finished product salt, and the present invention does not do the specific ingredient of the fuse salt
Limitation need to only guarantee CNO-1Mass of ion score is 28%~40%, works as CNO-1Mass of ion score is 28%~40%
When, latch hook body surface has high N gesture, can accelerate nitriding speed and deepen nitriding thickness.In a specific embodiment,
The characteristics of liquid ions nitridation steps carry out in mid-frequency induction heating liquid ions nitriding furnace, the heating furnace is heating
Speed is fast, fuse salt temperature is uniform, wherein the flue of the mid-frequency induction heating liquid ions nitriding furnace uses stainless steel/pure titanium
Clad steel plate, to guarantee the purity of fuse salt.
Latch hook ontology is handled 10~40min by passive oxidation processing step in the salt bath furnace that temperature is 200~400 DEG C,
Preferably the temperature range can be 230~350 DEG C, and the time can be 15~28min, on the one hand which can close latch hook
Body surface gap, and Fe especially wear-resisting, with preferable corrosion resistance is formed in latch hook body surface3O4Compound layer, separately
On the one hand the process thoroughly neutralizes and has decomposed CNO-1Ion, to realize environmentally friendly production.
Low temperature aging processing step, by latch hook ontology, processing 3~5 is small in the air resistance furnace that temperature is 150~200 DEG C
When, preferably the temperature range can be 150~180 DEG C, and the time can be 3~4.5 hours, this step makes anticorrosion antiwear nitrogen
It is more uniform to change layer, further improves surface hardness, antiseptic property and the wear-resisting property of the latch hook ontology.
In embodiment of the disclosure, the anticorrosion antiwear layer which forms from outward appearance to inner essence can be successively
It may include compound layer and diffusion layer.Further, in an embodiment of the disclosure, the anticorrosion antiwear layer at least can be with
Including one or more of nitride tissue, carbide tissue and oxide tissue.For example, the compound layer may include
Fe2N、Fe3N、Fe4N、Fe3C、Fe3O4Compound tissue etc..This makes latch hook ontology have good wear-resisting and antiseptic property, no
Only itself is wear-resisting, and has good anti-attrition effect, further extends the service life of latch hook.
In above-described embodiment of the disclosure, nitriding heat treatment process is carried out in latch hook body surface and forms anticorrosion antiwear layer,
It to improve the anticorrosion antiwear performance of latch hook, prolongs its service life, and then avoid jeopardizing the factor of traffic safety, improves train
Travel safety.
In the description of the disclosure, in addition, term " first ", " second " are used for description purposes only, and it should not be understood as referring to
Show or imply relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include one or more of the features.In the description of the disclosure, " multiples' " contains
Justice is two or more, unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the disclosure.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can say this
Different embodiments or examples described in bright book are engaged and are combined.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (10)
1. a kind of goat latch hook, which is characterized in that including latch hook ontology, the latch hook body surface is through nitriding heat treatment process shape
At anticorrosion antiwear layer.
2. latch hook according to claim 1, which is characterized in that the latch hook ontology is forged by substrate, normalizing, quenched shape
At, and hardness is 190~200HB.
3. latch hook according to claim 2, which is characterized in that the substrate material of the latch hook ontology is 45 steel.
4. latch hook according to claim 2, which is characterized in that the anticorrosion antiwear layer from outward appearance to inner essence successively includes compound layer
And diffusion layer.
5. latch hook according to claim 4, which is characterized in that the anticorrosion antiwear layer includes at least nitride tissue, carbonization
One or more of object tissue and oxide tissue.
6. latch hook described according to claim 1~one of 5, which is characterized in that the nitriding heat treatment process is liquid ions infiltration
Nitrogen treatment process.
7. a kind of goat latch hook surface heat treatment process characterized by comprising
One substrate is provided, which is successively forged, normalizing and modifier treatment form latch hook ontology；
Liquid ions Nitrizing Treatment is carried out to the latch hook body surface and forms anticorrosion antiwear layer.
8. treatment process according to claim 7, which is characterized in that the latch hook ontology hardness is 190~200HB.
9. treatment process according to claim 7, which is characterized in that the anticorrosion antiwear layer from outward appearance to inner essence successively includes chemical combination
Nitride layer and diffusion layer.
10. treatment process according to claim 9, which is characterized in that the anticorrosion antiwear layer include at least nitride tissue,
One or more of carbide tissue and oxide tissue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811606167.7A CN109760715A (en) | 2018-12-27 | 2018-12-27 | Goat latch hook and its heat treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811606167.7A CN109760715A (en) | 2018-12-27 | 2018-12-27 | Goat latch hook and its heat treatment process |
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| CN109760715A true CN109760715A (en) | 2019-05-17 |
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Citations (4)
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|---|---|---|---|---|
| CN203499577U (en) * | 2013-07-05 | 2014-03-26 | 陕西铁马铸锻有限公司 | Novel anti-corrosion wear-proof special petroleum steel pipe |
| CN104195505A (en) * | 2014-07-26 | 2014-12-10 | 陕西铁马铸锻有限公司 | Process for preparing novel corrosion-resistant and wear-resistant color steel pipe |
| CN104289858A (en) * | 2013-07-16 | 2015-01-21 | 无锡华冶钢铁有限公司 | 42CrMoE structural alloy steel material and pin shaft processing method |
| CN204323396U (en) * | 2014-07-08 | 2015-05-13 | 张振坤 | The track switch external locking device of a kind of convenient regulating type and wear-resisting type |
-
2018
- 2018-12-27 CN CN201811606167.7A patent/CN109760715A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203499577U (en) * | 2013-07-05 | 2014-03-26 | 陕西铁马铸锻有限公司 | Novel anti-corrosion wear-proof special petroleum steel pipe |
| CN104289858A (en) * | 2013-07-16 | 2015-01-21 | 无锡华冶钢铁有限公司 | 42CrMoE structural alloy steel material and pin shaft processing method |
| CN204323396U (en) * | 2014-07-08 | 2015-05-13 | 张振坤 | The track switch external locking device of a kind of convenient regulating type and wear-resisting type |
| CN104195505A (en) * | 2014-07-26 | 2014-12-10 | 陕西铁马铸锻有限公司 | Process for preparing novel corrosion-resistant and wear-resistant color steel pipe |
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| 周文杰等: "20Cr钢奥氏体渗氮中温回火的初步研究", 《机电工程技术》 * |
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Application publication date: 20190517 |