CN1073485A - The thermal treatment process that is used for bimetal saw blade - Google Patents
The thermal treatment process that is used for bimetal saw blade Download PDFInfo
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- CN1073485A CN1073485A CN 92108196 CN92108196A CN1073485A CN 1073485 A CN1073485 A CN 1073485A CN 92108196 CN92108196 CN 92108196 CN 92108196 A CN92108196 A CN 92108196A CN 1073485 A CN1073485 A CN 1073485A
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- saw blade
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- treatment process
- thermal treatment
- oxidation
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Abstract
The invention discloses a kind of thermal treatment process that is used for bimetal saw blade, it comprises, and five processes promptly heats, cooling, tempering, ooze and oxidation altogether.Bimetal saw blade after this art breading has high abrasion, high rigidity, and its sawing life-span improves more than 10～25%, applicable to machine hacksaw blade, hand saw blade and band saw blade than the whole high speed hacksaw blade that obtains national silver medal.
Description
The present invention relates to a kind of thermal treatment process that is used for bimetal saw blade.
Bimetal saw blade is by structural low and synthetic rolling the forming of rapid steel.It can replace expensive rapid steel (all same below the integral body) saw blade, can be made into machine hacksaw blade, hand saw blade and band saw blade.Because in use not wear-resisting, often collapse tooth, frangibility; From metallographicobservation, Decarburized layer is dark partially, and martensite is thick, thus the sawing life-span be lower than the high speed saw blade, so not popular with users, sell output in the market seldom, its key issue is that thermal treatment process is improper.
Task of the present invention is to provide a kind of LH-1 thermal treatment process that is used for bimetal saw blade.Through the bimetal saw blade of this art breading, have high-wearing feature, high rigidity, low-friction coefficient and good anti-stick bits and anti-fatigue performance.In its sawing life-span, when the high rigidity round steel more than the sawing HV320, improve more than 25% than the high speed hacksaw blade that obtains national silver medal; When the soft round steel below the sawing HV240, can improve more than 10%.
The present invention can realize by following measure: earlier with the work in-process bimetal saw blade, in the salt bath furnace of fully deoxidation or vacuum oven, is heated to quenching temperature, after the classified cooling, carries out the complex phase isothermal quenching at martensite and bainite two-phase region, and twice of tempering.Again its finished product saw blade is placed on earlier in sulphur, nitrogen, carbon co-diffused salt bath (J-1 bath) and the oxidized still (Y-1 bath), carry out after the surface recombination thermo-chemical treatment.
The present invention specifically comprises five processes, and existing details are as follows:
1, heating: half-finished bimetal saw blade placed the salt bath furnace (BaO≤0.8%) of strict deoxidation or be higher than the vacuum oven of 1Pa in vacuum tightness, 800 °～900 ℃ preheatings 4 minutes, to be lower than rapid steel conventional quenching temperature (＜1225 ℃) heating 2～5 minutes, Decarburized layer is reduced in the 15um again.
2, cooling: at 50%Bacl
2, among the 30%Kcl, 20%Nacl medium, carried out gradient cooling 2～5 minutes with 550 °～650 ℃, then 240 °～280 ℃ (martensite and bainite two-phase region) isothermals 60～90 minutes;
3, tempering: at 100%NaNo
3In+2～4%NaoH medium, get 500 °～600 ℃ insulations 1～2 hour, twice of tempering; Replace the M+C+Ar quenching structure in the hope of tempered martensite MT+ lower bainite BL+ carbide C+ residual austenite Ar tissue, make the matrix highly malleablized with the impelling strength AK of raising bimetal saw blade and the index of fracture toughness property Klc;
4, ooze altogether: with bimetal finished product saw blade, 500 °～550 ℃ insulations 15～50 minutes, carrying out sulphur, nitrogen, carbon, to handle its salt bath composition be 5～30PPms=28～38%CNo
-18～28%CO
3 -Surplus is K
++ Na
++ Li
+; Except having concurrently and make the Decarburized layer carbon restoration the surface strengthen layer for obtaining;
5, oxidation: the saw blade after oozing altogether, direct impregnation is 50～70%(KoH+NaOH) in major ingredient, 15～30%(NaCO
3+ KNo
3), 3～6%(K
2CO
3+ Na
2CO
3+ LiCo
3Oxidation in+RexOy) the oxidation bath, temperature are 300 °～400 ℃ isothermals after 5～25 minutes, air cooling.
Bimetal saw blade after the LH-1 thermal treatment process is handled, the infiltration layer of the nitrogen carbon compound of separating out based on disperse is 20～40um.Microhardness is HV0.025, and max 〉=1000(is equivalent to more than the HRC69).The level of its over-all properties international advanced person's in the approaching present age Sweden Sang Defuke (SandVik) saw blade.
Embodiment 1
Bimetal saw blade classification: the saw blade of sawing high rigidity round steel
The significant parameter of heating: 830 °～870 ℃ preheating → 1180 °～1220 ℃ of heating;
Refrigerative significant parameter: 830～870 ℃ of gradient cooling → 270 ° → 330 ℃ isothermal 30～90 minutes;
Tempered significant parameter: 540 °～580 ℃ * 1.5～2.5h * twice.
The significant parameter that oozes altogether: 5～20PPmS
=31～37%CNO
-20～26%CO
3 =; 530 °～570 ℃ * 20～45 minutes.
The significant parameter of oxidation: 60～80%(KOH+NaOH), 10～25%(NaNo
3+ KNO
3), 3～6%(K
2CO
3+ Na
2CO
3+ LiCo
3+ RexOy); 320 °～380 ℃ * 8～25 minutes.
Diffusion layer organization: ε phase+Fe
3O
4Compound layer≤3um, disperse phase is separated out layer 15～35um.
Microhardness: HV0.025, max 〉=1020.
Surface hardness: HV1 〉=900.
Embodiment 2
Bimetal saw blade classification: the saw blade of sawing soft round steel
The significant parameter of heating: 830 °～870 ℃ preheating → 1150 °～1200 ℃ of heating.
Refrigerative significant parameter: 830 °～870 ℃ gradient cooling → 270 °～330 ℃ isothermal 60～120 minutes.
Tempered significant parameter: twice of 560 °～600 ℃ * 1.5～2.5h.
The significant parameter that oozes altogether: the salt bath composition is with embodiment 1; 530 °～570 ℃ * 15～35 minutes.
The significant parameter of oxidation: fully with embodiment 1.
Diffusion layer organization: Fe
3O
4Be main compound layer≤2um, disperse phase is separated out layer 15～30um.
Microhardness: HV0.025, max 〉=960.
Surface hardness: HY1 〉=850
Claims (2)
1, a kind of thermal treatment process that is used for bimetal saw blade is characterized in that comprising five processes promptly:
(1) heating: earlier in the salt bath furnace (BaO≤0.8%) of 800 °～900 ℃ strict deoxidation or in vacuum tightness, be higher than in the vacuum oven of 1Pa preheating 4 minutes, reheat≤1225 ℃ 2～5 minutes;
(2) cooling: at 50%BaCl
2, among the 30%Kcl, 20%Nacl medium, with 550 °～650 ℃ gradient cooling 2～5 minutes, then 240 °～280 ℃ isothermals 60～90 minutes;
(3) tempering: at 100%NaNo
3In+2～4%NaoH medium, get 500 °～600 ℃, be incubated 1～2 hour, twice of tempering;
(4) ooze altogether: (composition is 5～30ppmS-28～38%CNO-18～28%CO in 500 °～550 ℃ salt bath
- 3, surplus is K
++ Na
++ Li
+) be incubated 15～50 minutes;
(5) oxidation: being dipped in major ingredient immediately is 50～70% (KOH+NaoH), 15～30% (NaNo
3+ KNO
3), 3～6% (K
2CO
3+ Ha
2Co
3+ LiCo
3Oxidation in+Rexoy) the oxidation bath, temperature is 300 °～400 ℃, isothermal is air cooling after 5～25 minutes.
2, thermal treatment process according to claim 1 is characterized in that being applicable to machine hacksaw blade, hand saw blade and band saw blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108196 CN1073485A (en) | 1992-07-03 | 1992-07-03 | The thermal treatment process that is used for bimetal saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108196 CN1073485A (en) | 1992-07-03 | 1992-07-03 | The thermal treatment process that is used for bimetal saw blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1073485A true CN1073485A (en) | 1993-06-23 |
Family
ID=4943318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108196 Pending CN1073485A (en) | 1992-07-03 | 1992-07-03 | The thermal treatment process that is used for bimetal saw blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073485A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398241C (en) * | 2003-04-14 | 2008-07-02 | 倪柏钢 | Method for mfg of double-metal saw blade |
| CN102632298A (en) * | 2011-02-13 | 2012-08-15 | 刘广域 | Preparation method of carborundum saw blade |
| CN103451595A (en) * | 2013-09-02 | 2013-12-18 | 中国科学院金属研究所 | Fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating of magnesium alloy surface as well asand preparation and application |
| CN103924045A (en) * | 2014-05-06 | 2014-07-16 | 大连圣洁真空技术开发有限公司 | Quenching heat treatment process for composite steel and composite steel obtained by adopting heat treatment process |
| CN105063325A (en) * | 2015-09-09 | 2015-11-18 | 湖南晟宏新材料科技有限公司 | Band saw blade heat treatment technology |
| CN105161321A (en) * | 2015-09-07 | 2015-12-16 | 扬中市佳旺华电器有限公司 | Combination switch for circuit breaker switch cabinet |
| CN106191760A (en) * | 2016-08-31 | 2016-12-07 | 山东温岭精锻科技有限公司 | 5CrNiMo mould carbon nitrogen sulphur common seeping Technology for Heating Processing |
| CN109266831A (en) * | 2018-11-26 | 2019-01-25 | 江苏天硕合金材料有限公司 | Heat treatment method is used in a kind of production of saw blade |
| CN109402336A (en) * | 2018-12-26 | 2019-03-01 | 河南理工大学 | The Bainitic hardening technique of steel measuring tape band |
| CN110004284A (en) * | 2018-01-05 | 2019-07-12 | 成都成量工具集团有限公司 | A kind of tool checks the manufacturing method of dedicated file |
-
1992
- 1992-07-03 CN CN 92108196 patent/CN1073485A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398241C (en) * | 2003-04-14 | 2008-07-02 | 倪柏钢 | Method for mfg of double-metal saw blade |
| CN102632298A (en) * | 2011-02-13 | 2012-08-15 | 刘广域 | Preparation method of carborundum saw blade |
| CN103451595A (en) * | 2013-09-02 | 2013-12-18 | 中国科学院金属研究所 | Fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating of magnesium alloy surface as well asand preparation and application |
| CN103451595B (en) * | 2013-09-02 | 2015-09-23 | 中国科学院金属研究所 | Mg alloy surface fused salt oxygen carbon sulphur oozes Preparing Anti-corrosion Ceramic Coating and Synthesis and applications altogether |
| CN103924045A (en) * | 2014-05-06 | 2014-07-16 | 大连圣洁真空技术开发有限公司 | Quenching heat treatment process for composite steel and composite steel obtained by adopting heat treatment process |
| CN105161321A (en) * | 2015-09-07 | 2015-12-16 | 扬中市佳旺华电器有限公司 | Combination switch for circuit breaker switch cabinet |
| CN105063325A (en) * | 2015-09-09 | 2015-11-18 | 湖南晟宏新材料科技有限公司 | Band saw blade heat treatment technology |
| CN106191760A (en) * | 2016-08-31 | 2016-12-07 | 山东温岭精锻科技有限公司 | 5CrNiMo mould carbon nitrogen sulphur common seeping Technology for Heating Processing |
| CN110004284A (en) * | 2018-01-05 | 2019-07-12 | 成都成量工具集团有限公司 | A kind of tool checks the manufacturing method of dedicated file |
| CN109266831A (en) * | 2018-11-26 | 2019-01-25 | 江苏天硕合金材料有限公司 | Heat treatment method is used in a kind of production of saw blade |
| CN109402336A (en) * | 2018-12-26 | 2019-03-01 | 河南理工大学 | The Bainitic hardening technique of steel measuring tape band |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |