CN102443810A - Surface strengthening treatment method of cold-working die steel punch - Google Patents
Surface strengthening treatment method of cold-working die steel punch Download PDFInfo
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- CN102443810A CN102443810A CN2011104038150A CN201110403815A CN102443810A CN 102443810 A CN102443810 A CN 102443810A CN 2011104038150 A CN2011104038150 A CN 2011104038150A CN 201110403815 A CN201110403815 A CN 201110403815A CN 102443810 A CN102443810 A CN 102443810A
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Abstract
The invention relates to a surface strengthening treatment method of a cold-working die steel punch. The invention belongs to the field of metal materials. The method comprises specific steps that: a finished cold-working die steel punch is preheated to a temperature of 500-600 DEG C under vacuum; the preheated punch is placed in a borax mixture salt bath, wherein the borax mixture salt bath comprises components of, by weight: 8-15% of V2O5, 6-12% of Y2O3, 8-12% of NaF, and balance of Na2B4O7 and inevitable impurities; the temperature of the punch is maintained at 850-1150 DEG C for 1.0-15hours, such that a metallurgical-bonded ceramic layer is formed on the surface of the punch through a diffusion reaction; the punch is subject to salt bath quenching under a temperature of 980-1200 DEG C, and is subject to a tempering treatment under a temperature of 300-500 DEG C, such that the dimensional precision stability of the punch is ensured. With the method, metallurgical bonding is formed between the ceramic layer and the punch substrate; the dimensional precision of the punch is high; the hardness of the ceramic layer is high; and the service life of the punch is substantially improved.
Description
Technical field
The present invention relates to metal material field, particularly relate to a kind of cold-work die steel drift surface treatment method in work-ing life that is used to improve.
Background technology
The cold-work die steel drift is widely used in the punching technology process that automobile, motorcycle etc. are made the field.At present, the cold-work die steel drift is mainly by Cr
12The MoV cold-work die steel is made, and work-ing life is low, is merely 2000-3000 time, has just formed scratch, decortication on the surface, even pier is thick and fracture, and therefore, needs the frequent change drift, has a strong impact on production efficiency.Simultaneously, the tool material is touched in cold-working caused a large amount of wastes, bring enormous economic loss.Cold-work die steel punch head surface treatment process commonly used in the industry has technologies such as nitriding, chromium plating, electroless plating, PVD, boronising.But, because handling the back punching head surface hardness, aforesaid method generally is lower than HV2000, therefore can't significantly improve the work-ing life of drift.At present, the urgent need exploitation is a kind of can significantly improve cold-work die steel punch head surface hardness and improve the surface treatment method in work-ing life.
It is simple, reliable to the purpose of this invention is to provide a kind of technology, and a kind of cold-work die steel punch head surface enhanced processing method that is easy to apply.
Technical scheme of the present invention is: the cold-work die steel drift after the preheating under the vacuum is put into high-temperature salt bath; Through the reaction diffusion; Punch head surface form certain thickness and with matrix be the ceramic layer of metallurgical binding, thereby significantly improve the surface hardness and the work-ing life of drift.
1, a kind of cold-work die steel punch head surface enhanced processing method is characterized in that this method may further comprise the steps:
(1) under vacuum, is preheated to 500-600 ℃ with precision work and through the cold-work die steel drift after the conventional thermal treatment;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath component content weight percent is: V
2O
5Be 8-15%, Y
2O
3For 6-12%, NaF are 8-12%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 850-1150 ℃ temperature, be incubated 1.0-15 hour, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching at 980-1200 ℃, carry out temper at 300-500 ℃ then, guarantee the dimensional precision stability of drift.
2, a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that said ceramic layer thickness is 3.0～50 microns, and ceramic layer is by V
8C
7Form.
3, a kind of cold-work die steel punch head surface enhanced processing method according to claim 2 is characterized in that, also contains mass percent in the said ceramic layer and be 1～10% V
2B
3, TiC, Cr
7C
3In one or more.
The present invention and present existing compared with techniques have following characteristics:
1) between ceramic layer and the matrix be metallurgical binding, bonding strength is high;
2) ceramic layer hardness is high, and through after the surface treatment, punch head surface hardness is brought up to more than the HV3000 from HV650-700;
3) dimensional precision is high, and the tolerance of dimension after the processing is little;
4) significantly improve work-ing life of cold-work die steel drift, bring up to 20000-100000 time for 2000-3000 time before handle;
5) processing cost is low, and technology is simple, easy handling.
Embodiment
Embodiment one
(1) with normal heat treated Cr after the precision work
12MoV cold-work die steel drift is preheated to 550 ℃ under vacuum;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath consist of weight ratio V
2O
5Be 9-13%, Y
2O
3For 8-10%, NaF are 9-11%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 980 ℃ temperature, be incubated 5 hours, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching at 1030 ℃, carry out temper at 350 ℃ then, guarantee the dimensional precision stability of drift;
(5) through form the ceramic layer of metallurgical binding after the surface treatment on the surface of drift; Ceramic layer thickness is the 15-20 micron; Ceramic layer is by V
8C
7, 1%TiC, 3%Cr
7C
3Form; Ceramic layer hardness is more than the HV3000.Cold-work die steel drift has after treatment improved more than 5 times work-ing life.
Embodiment two
(1) normal heat treated Cr12MoV cold-work die steel drift after the precision work is preheated to 580 ℃ under vacuum;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath consist of weight ratio V
2O
5Be 11%, Y
2O
3Be 9%, NaF is 10%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 920 ℃ temperature, be incubated 6 hours, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching at 1100 ℃, carry out temper at 400 ℃ then, guarantee the dimensional precision stability of drift;
(5) through form the ceramic layer of metallurgical binding after the surface treatment on the surface of drift; Ceramic layer thickness is the 10-15 micron; Ceramic layer is mainly by V
8C
7Form; Ceramic layer hardness is more than the HV3000.Cold-work die steel drift has after treatment improved more than 10 times work-ing life.
Embodiment three
(1) normal heat treated Cr12MoV cold-work die steel drift after the precision work is preheated to 520-580 ℃ under vacuum;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath consist of weight ratio V
2O
5Be 10-14%, Y
2O
3For 9.5-11.5%, NaF are 9.5-11.5%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 910-1000 ℃ temperature, be incubated 5-11 hour, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching, carry out temper at 320-450 ℃ then, guarantee the dimensional precision stability of drift;
(5) through form the ceramic layer of metallurgical binding after the surface treatment on the surface of drift; Ceramic layer thickness is 10 to 40 microns; Ceramic layer is mainly by V
8C
7Form, and a spot of V of 1.5% to 5.5%
2B
3, TiC, Cr
7C
3Cold-work die steel drift has after treatment improved more than 8 times work-ing life.
Embodiment four
(1) normal heat treated Cr12MoV cold-work die steel drift after the precision work is preheated to 590 ℃ under vacuum;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath consist of weight ratio V
2O
5Be 10.5%, Y
2O
3Be 9.2%, NaF is 9.2%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 940-1020 ℃ temperature, be incubated 13 hours, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching at 1050 ℃, carry out temper at 450 ℃ then, guarantee the dimensional precision stability of drift;
(5) through form the ceramic layer of metallurgical binding after the surface treatment on the surface of drift; Ceramic layer thickness is the 10-35 micron; Ceramic layer is mainly by V
8C
7Form; Ceramic layer hardness is more than the HV3000.Cold-work die steel drift has after treatment improved more than 6 times work-ing life.
Claims (7)
1. cold-work die steel punch head surface enhanced processing method is characterized in that this method may further comprise the steps:
(1) under vacuum, is preheated to 500-600 ℃ with precision work and through the cold-work die steel drift after the conventional thermal treatment;
(2) then the drift of preheating is put into borax mixture salt bath, borax mixture salt bath component content weight percent is: V
2O
5Be 8-15%, Y
2O
3For 6-12%, NaF are 8-12%, all the other are Na
2B
4O
7And unavoidable impurities;
(3) under 850-1150 ℃ temperature, be incubated 1.0-15 hour, form the ceramic layer of metallurgical binding at punch head surface through diffusion reaction;
(4) drift is carried out salt bath quenching at 980-1200 ℃, carry out temper at 300-500 ℃ then, guarantee the dimensional precision stability of drift.
2. a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that said ceramic layer thickness is 3.0～50 microns, and ceramic layer is by V
8C
7Form.
3. a kind of cold-work die steel punch head surface enhanced processing method according to claim 2 is characterized in that, also contains mass percent in the said ceramic layer and be 1～10% V
2B
3, TiC, Cr
7C
3In one or more.
4. a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that, said borax mixture salt bath component content weight percent is: V
2O
5Be 9-13%, Y
2O
3For 8-10%, NaF are 9-11%, all the other are Na
2B
4O
7And unavoidable impurities.
5. a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that, said borax mixture salt bath component content weight percent is: V
2O
5Be 10-14%, Y
2O
3For 9.5-11.5%, NaF are 9.5-11.5%, all the other are Na
2B
4O
7And unavoidable impurities.
6. a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that, said borax mixture salt bath component content weight percent is: V
2O
5Be 11%, Y
2O
3Be 9%, NaF is 10%, all the other are Na
2B
4O
7And unavoidable impurities.
7. a kind of cold-work die steel punch head surface enhanced processing method according to claim 1 is characterized in that, said borax mixture salt bath component content weight percent is: V
2O
5Be 10.5%, Y
2O
3Be 9.2%, NaF is 9.2%, all the other are Na
2B
4O
7And unavoidable impurities.
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| CN2011104038150A CN102443810A (en) | 2011-12-07 | 2011-12-07 | Surface strengthening treatment method of cold-working die steel punch |
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|---|---|---|---|
| CN2011104038150A CN102443810A (en) | 2011-12-07 | 2011-12-07 | Surface strengthening treatment method of cold-working die steel punch |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243323A (en) * | 2013-05-09 | 2013-08-14 | 张佑锋 | Preparation method of special flexible ceramic composite infiltration layer |
| CN103320748A (en) * | 2013-07-04 | 2013-09-25 | 武汉海德天物新材料有限公司 | Mold surface heat treatment hardening process |
| WO2014048200A1 (en) * | 2012-09-25 | 2014-04-03 | Huang Yaoquan | New thermochemical treatment process for td punch pin |
| CN103981339A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | High-speed steel surface crystal porcelainizing formula and process method thereof |
| CN104531975A (en) * | 2014-12-06 | 2015-04-22 | 苏州欣航微电子有限公司 | Electric bicycle flywheel quenching coating apparatus |
| CN104962701A (en) * | 2015-07-29 | 2015-10-07 | 山东伊莱特重工有限公司 | Oil press punch non-oxidation decarbonization partially-reinforced heat treatment technique |
| CN106282906A (en) * | 2016-08-31 | 2017-01-04 | 江苏华力金属材料有限公司 | A kind of rustless steel resistance and fingerprint resistance surface treatment method |
| CN107217203A (en) * | 2017-04-12 | 2017-09-29 | 滁州市东华模具制造有限公司 | A kind of preparation method of steel wheel hub cold punching die |
| CN109338286A (en) * | 2018-10-08 | 2019-02-15 | 河南精诚汽车零部件有限公司 | A kind of boron-aluminium co-permeation treatment process of stamping die |
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Patent Citations (4)
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048200A1 (en) * | 2012-09-25 | 2014-04-03 | Huang Yaoquan | New thermochemical treatment process for td punch pin |
| CN103243323A (en) * | 2013-05-09 | 2013-08-14 | 张佑锋 | Preparation method of special flexible ceramic composite infiltration layer |
| CN103243323B (en) * | 2013-05-09 | 2015-01-14 | 张佑锋 | Preparation method of special flexible ceramic composite infiltration layer |
| CN103320748A (en) * | 2013-07-04 | 2013-09-25 | 武汉海德天物新材料有限公司 | Mold surface heat treatment hardening process |
| CN103320748B (en) * | 2013-07-04 | 2015-06-10 | 武汉海德天物新材料有限公司 | Mold surface heat treatment hardening process |
| CN103981339A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | High-speed steel surface crystal porcelainizing formula and process method thereof |
| CN104531975A (en) * | 2014-12-06 | 2015-04-22 | 苏州欣航微电子有限公司 | Electric bicycle flywheel quenching coating apparatus |
| CN104962701A (en) * | 2015-07-29 | 2015-10-07 | 山东伊莱特重工有限公司 | Oil press punch non-oxidation decarbonization partially-reinforced heat treatment technique |
| CN106282906A (en) * | 2016-08-31 | 2017-01-04 | 江苏华力金属材料有限公司 | A kind of rustless steel resistance and fingerprint resistance surface treatment method |
| CN107217203A (en) * | 2017-04-12 | 2017-09-29 | 滁州市东华模具制造有限公司 | A kind of preparation method of steel wheel hub cold punching die |
| CN109338286A (en) * | 2018-10-08 | 2019-02-15 | 河南精诚汽车零部件有限公司 | A kind of boron-aluminium co-permeation treatment process of stamping die |
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Application publication date: 20120509 |