CN1103898A - Quick gas thin layer carbonitriding for hacksaw blade - Google Patents
Quick gas thin layer carbonitriding for hacksaw blade Download PDFInfo
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- CN1103898A CN1103898A CN 93121033 CN93121033A CN1103898A CN 1103898 A CN1103898 A CN 1103898A CN 93121033 CN93121033 CN 93121033 CN 93121033 A CN93121033 A CN 93121033A CN 1103898 A CN1103898 A CN 1103898A
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- carbonitriding
- drops
- hacksaw blade
- thin layer
- quick gas
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Abstract
The invention is characterized by that No.101 and No.102 organic solution drops are dripped into the pit-type carburization furnace under 820-860 deg.C to proceed the carbonitriding treatment of steel saw-blade. As compared with the prior art liquid carbonitriding for steel saw blade, this method features low cost of cementation agent, quick cementation speed, short period, and no toxic harm, and eliminates such previous defects as black specks on saw-blade.
Description
The present invention relates to a kind of heat treating method of hacksaw blade gas carbonitriding.
Present commercially available hacksaw blade all adopts liquid carbonitriding to reach its hardness and sawing performance, used main penetration enhancer is the sodium cyanide of severe toxicity, its confusion technology process is that saw blade is in 825～850 ℃ cyaniding salt bath, carbonitriding through 2.5～4 hours, then come out of the stove quenching, proofread and correct, clean and carry out low-temperaturetempering.Continue to use though this salt bath oozes always altogether, have hypertoxic penetration enhancer cost height, fused salt composition instability, every monthly need of retort changed once, and quality is often unstable, and the saw blade after oozing altogether easily produces the black piebald, hardness is on the low side, and scrap rate directly influences economic benefit up to 30%.And it is seriously polluted, the infringement workers ' health, discarded cyanogen salt causes public hazards, environmental administration is often because of pollution limit production and fine, though the patent documentation of some gas carbonitridings is disclosed in recent years, as " quick-acting gaseous combined cementation process of carbon and other element " CN89106936.4, " low-carbon steel scissors and thermal treatment process thereof " CN85107920, but all be applicable to the processing of bigger or thicker workpiece, ooze the temperature height altogether, the time is long.The processing of oozing altogether that particularly is suitable for as hacksaw blade thin type material is found as yet.
The objective of the invention is to overcome all drawbacks that above-mentioned cyaniding salt bath is handled hacksaw blade, formulate a kind of nontoxic pollution-free, the carbonitriding hacksaw blade thermal treatment process that the cost inferior quality is excellent.
Process program of the present invention is: select 20 carbon steel coiled strips for use, after itemize, blanking and punching, side tooth and moving tooth are shaped, carry out gas carbonitriding in instillation formula pit gas carburizing furnace, ooze temperature altogether and be controlled at 820～860 ℃, carbonitriding medium adopts two kind 101
#With 102
#Organic drops, the time of oozing is 1～1.5 hour altogether, at exhaust cycle and the phase of oozing altogether all above-mentioned two kinds of drops are added in the cementing furnace with given pace, carry out carbonitriding, hacksaw blade is come out of the stove quench and low-temperaturetempering then.
Be elaborated below in conjunction with the embodiment of the invention and accompanying drawing thereof:
Accompanying drawing is an embodiment of the invention process diagram,
Referring to accompanying drawing, choose 20 coil of strip material, through itemize, blanking and punching, sawtooth is after moving tooth is shaped, its specification is 300 * 12 * 1(mm), puts in batches instillation formula pit gas carburizing furnace and carries out nitriding and ooze altogether, comes out of the stove after oozing altogether saw blade is directly quenched and low-temperaturetempering in deep fat.
Concrete processing condition:
(1) oozes temperature: 820-860 ℃ altogether, use the RJJ35-9 pit gas carburizing furnace.
(2) diffusion medium: 101
#Drops is the ethanolic soln that contains methane amide 2-8% and tetracol phenixin 1-4%.102
#Drops is the kerosin that contains tetracol phenixin 1-4%.
(3) diffusion medium consumption: at exhaust cycle 101
#Drops oozes stove, 102 altogether by 80～170 speed addings of per minute
#Drops is added dropwise to by per minute 80-100.Oozing diffusion period 101 by force
#Drops and 102
#Drops all is added dropwise to cementing furnace with 70～90.
(4) ooze the time altogether: exhaust cycle 40 minutes, oozed by force diffusion period 60-90 minute.
(5) the quenching hot oil temperature is 80 ℃, and tempering temperature is 180-250 ℃.
Adopt the hacksaw blade after the art breading of the present invention, its tooth portion depth of penetration reaches 0.14～0.20mm, and tooth portion hardness is HRA79.3～80.3, and GB is HRA78～83; First 5 minutes and 10 seconds break time of sawing performance, the 5th 5 minutes and 48 seconds break time, national standard is not more than 6 minutes first break time, and be not more than 9 minutes the 5th break time, reaches the high-quality requirement fully.It is simple that the present invention has Technology, characteristics with short production cycle, the furnace gas easy control of components, depth of penetration is suitable, saw blade is soft inside despite one's hard shell, tooth portion hardness is higher, and sawing performance is good, steady quality yield rate height, saw blade does not have the black piebald, and the low toxicological harmless phenomenon of penetration enhancer cost, but decontamination improves workman's working condition and labour intensity, has avoided the fine or the limited production situation of environmental administration.
Claims (4)
1, quick gas thin layer carbonitriding for hacksaw blade, it is that the 20 carbon steel saw blades that are shaped are put into pit carburizing furnace, carries out gas carbonitriding and handles, and it is characterized in that the carbonitriding temperature is 820～860 ℃, carbonitriding medium is 101
#With 102
#Organic drops, the carbonitriding time is 1～1.5 hour, then hacksaw blade is come out of the stove, in hot oil bath, quench, and low-temperaturetempering.
2, quick gas thin layer carbonitriding for hacksaw blade according to claim 1 is characterized in that diffusion medium 101
#Drops is the ethanolic soln that contains methane amide 2-8% and tetracol phenixin 1-4%, diffusion medium 102
#Drops is the kerosin that contains tetracol phenixin 1-4%.
3, according to claim 1,2 described quick gas thin layer carbonitriding for hacksaw blade, the adding speed that it is characterized in that diffusion medium is at exhaust cycle 101
#Drops is added dropwise to cementing furnace by per minute 80～170, and 102
#Drops is added dropwise to cementing furnace by per minute 80～100, and exhaust cycle is 40 minutes, is oozing diffusion period 101 by force
#With 102
#Drops all is added dropwise to cementing furnace with per minute 70～90, and it oozes diffusion period by force is 1-1.5 hour.
4, quick gas thin layer carbonitriding for hacksaw blade according to claim 1 is characterized in that hacksaw blade quenching oil temperature is 80 ℃, and tempering temperature is 180-250 ℃, and the time is 1～1.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121033A CN1034349C (en) | 1993-12-16 | 1993-12-16 | Quick gas thin layer carbonitriding for hacksaw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121033A CN1034349C (en) | 1993-12-16 | 1993-12-16 | Quick gas thin layer carbonitriding for hacksaw blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1103898A true CN1103898A (en) | 1995-06-21 |
| CN1034349C CN1034349C (en) | 1997-03-26 |
Family
ID=4993543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93121033A Expired - Fee Related CN1034349C (en) | 1993-12-16 | 1993-12-16 | Quick gas thin layer carbonitriding for hacksaw blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034349C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435065B (en) * | 2007-11-15 | 2010-12-01 | 冯俊杰 | Low temperature rare earth catalytic cementation soft nitriding processing technology for high speed steel mould |
| CN103146902A (en) * | 2012-12-19 | 2013-06-12 | 烟台金光工具有限公司 | Automatic production line for saw blade heat treatment |
| CN105648394A (en) * | 2014-11-14 | 2016-06-08 | 陕西飞机工业（集团）有限公司 | Carbonitriding heat treatment process method |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100188B (en) * | 1985-04-01 | 1988-09-07 | 陕西机械学院 | Track nitrogen moderate temp. gas carburization technology |
| CN85107920A (en) * | 1985-10-25 | 1987-05-06 | 陕西机械学院 | Low-carbon steel scissors and thermal treatment process thereof |
| CN1030663C (en) * | 1989-08-29 | 1996-01-10 | 施教阁 | Quick-acting gaseous combined cementation process of carbon and other elements |
-
1993
- 1993-12-16 CN CN93121033A patent/CN1034349C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435065B (en) * | 2007-11-15 | 2010-12-01 | 冯俊杰 | Low temperature rare earth catalytic cementation soft nitriding processing technology for high speed steel mould |
| CN103146902A (en) * | 2012-12-19 | 2013-06-12 | 烟台金光工具有限公司 | Automatic production line for saw blade heat treatment |
| CN103146902B (en) * | 2012-12-19 | 2015-02-04 | 烟台金光工具有限公司 | Automatic production line for saw blade heat treatment |
| CN105648394A (en) * | 2014-11-14 | 2016-06-08 | 陕西飞机工业（集团）有限公司 | Carbonitriding heat treatment process method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034349C (en) | 1997-03-26 |
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