CN1034349C - Quick gas thin layer carbonitriding for hacksaw blade - Google Patents
Quick gas thin layer carbonitriding for hacksaw blade Download PDFInfo
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- CN1034349C CN1034349C CN93121033A CN93121033A CN1034349C CN 1034349 C CN1034349 C CN 1034349C CN 93121033 A CN93121033 A CN 93121033A CN 93121033 A CN93121033 A CN 93121033A CN 1034349 C CN1034349 C CN 1034349C
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- carbonitriding
- hacksaw blade
- milliliter
- hacksaw
- blade
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Abstract
The present invention belongs to the field of the heat treatment of a metal material, which relates to a gas rapid thin layer carbonitriding technology for a hacksaw blade. The technology is characterized in that a hacksaw blade is treated by carbonitriding by dropping 101<#> and 102<#> organic solution drops into a well type carburizing furnace at 820 to 860 DEG C. Compared with the existing liquid carbonitriding of the hacksaw blade, the technology has the characteristics of low cost of a carbonitriding agent, high carbonitriding speed, short period and no toxicity and has the advantages of elimination of the defect of black mottle easily generated on the existing hacksaw blade, high finished product rate and stable quality, and hacksaw tooth hardness and hacksaw cutting performance reach the Chinese standard requirements and are superior to those of the liquid carbonitriding hacksaw blade.
Description
The present invention relates to the heat treating method of hacksaw blade, particularly the 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 saline solution, 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, dissolved 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 seriously polluted, the infringement workers ' health, discarded cyanogen salt causes public hazards, and environmental administration is often because of pollution limit production and fine.Though disclose the patent documentation of some gas carbonitridings in recent years.As " wet body carburization process in little nitrogen " CN85100188A, " low-carbon steel scissors and thermal treatment process thereof " CN85107920, but the temperature height is oozed in the processing that all is only applicable to bigger or thicker workpiece altogether, and the time is long, is unsuitable for the thermal treatment of hacksaw blade.And the treatment process that oozes altogether that is particularly 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, gas carbonitriding method of the prior art is improved, formulate a kind of nontoxic pollution-free, cost is low, the carbonitriding hacksaw blade heat-treating methods of Functionality, quality and appealing design.
To achieve the above object, process program of the present invention is, selecting predominant quantity percentage ratio for use is 0.17-0.24% carbon, 0.17-0.37% silicon, 0.35-0.65 the carbon steel coiled strip of manganese, through itemize, blanking and punching, gear-shaping with after pulling out the tooth shaping, in instillation formula pit gas carburizing furnace, carry out carbonitriding.Process characteristic is, the carbonitriding temperature is 820-860 ℃, and carbonitriding medium is A and B organic solution.Wherein A is the tetracol phenixin that 1 liter of industrial spirit adds 20-80 milliliter methane amide and 10-40 milliliter, and B is the tetracol phenixin that 1 liter of kerosene adds the 10-40 milliliter.The diffusion medium add-on is at exhaust cycle, and A presses per minute 3.08-6.54 milliliter, and B splashes into cementing furnace by per minute 3.08-3.85 milliliter.Exhaust cycle is 40 minutes.Oozing by force and diffusion period, A and B all splash into cementing furnace by per minute 2.69-3.46 milliliter.Ooze by force and be diffused as 60-90 minute.Then hacksaw blade is come out of the stove, in hot oil bath, quench and carry out low-temperaturetempering.
Adopt the hacksaw blade after the art breading of the present invention, its tooth portion depth of penetration can reach 0.26-0.32mm; Tooth portion hardness is HRA83-84, and it is HRA76 that GB requires lowest hardness.Sawing standard coupon, first 5 minutes and 10 seconds break time, the 5th 5 minutes and 48 seconds break time.The GB regulation is not more than 5 minutes and 30 seconds first break time, and be not more than 7 minutes and 30 seconds the 5th break time, reaches the high-quality requirement fully.Compared with prior art, 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 inner soft and outer rigid, tooth portion hardness height, sawing performance is good, steady quality, yield rate height, saw blade does not have the black piebald, and low, the toxicological harmless of penetration enhancer cost, but decontamination has improved workman's working condition and labour intensity.
The present invention is further illustrated below in conjunction with drawings and embodiments.
Accompanying drawing is the process diagram of embodiment of the present invention.
Referring to accompanying drawing, choosing predominant quantity percentage ratio is 0.17-0.24% carbon, 0.17-0.37 silicon, the carbon steel coiled strip of 0.35-0.65% manganese, through itemize, blanking and punching, gear-shaping, the hacksaw blade after pulling out tooth and being shaped are put into instillation formula pit gas carburizing furnace in batches and are carried out carbonitriding.The carbonitriding temperature is 820-860 ℃, and carbonitriding medium is A and B organic solution.Wherein A is the tetracol phenixin that 1 liter of industrial spirit adds 20-80 milliliter methane amide and 10-40 milliliter.B is the tetracol phenixin that 1 liter of kerosene adds the 10-40 milliliter.The diffusion medium add-on is at exhaust cycle, and A presses per minute 3.08-6.54 milliliter, and B splashes into cementing furnace by per minute 3.08-3.85 milliliter.Exhaust cycle is 40 minutes.Oozing by force and diffusion period, A and B all splash into cementing furnace by per minute 2.69-3.46 milliliter.Ooze by force and diffusion period is 60-90 minute.Then hacksaw blade is come out of the stove, in temperature is 80 ℃ hot oil bath, quench.Carry out temper again, tempering temperature is 180-250 ℃, and the time is 60-90 minute.
Claims (2)
1. the heat treating method of a quick gas thin layer carbonitriding for hacksaw blade, it is being shaped, predominant quantity percentage ratio is 0.17～0.24% carbon, 0.17～0.37% silicon, 0.35 the carbon steel saw blade of～0.65% manganese is put into cementing furnace, carrying out gas carbonitriding handles, it is characterized in that the carbonitriding temperature is 820～860 ℃, carbonitriding medium is A and B organic solution, wherein A is the tetracol phenixin that 1 liter of industrial spirit adds 20-80 milliliter methane amide and 10-40 milliliter, B is the tetracol phenixin that 1 liter of kerosene adds the 10-40 milliliter, the diffusion medium add-on is at exhaust cycle, A presses per minute 3.08-6.54 milliliter, B splashes into cementing furnace by per minute 3.08-3.85 milliliter, exhaust cycle is 40 minutes, oozing by force and diffusion period, A and B all splash into cementing furnace by per minute 2.69-3.46 milliliter, ooze by force and diffusion period is 60-90 minute, then hacksaw blade is come out of the stove, in hot oil bath, quench and low-temperaturetempering.
2. the heat treating method that a kind of hacksaw blade quick gas thin layer carbon oxygen according to claim 1 oozes altogether is characterized in that hacksaw blade quenching oil temperature is 80 ℃, and tempering temperature is 180-250 ℃, and the time is 60-90 minute.
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 CN1103898A (en) | 1995-06-21 |
| CN1034349C true 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) |
Families Citing this family (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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107920A (en) * | 1985-10-25 | 1987-05-06 | 陕西机械学院 | Low-carbon steel scissors and thermal treatment process thereof |
| CN85100188A (en) * | 1985-04-01 | 1988-08-10 | 陕西机械学院 | Wet body carburization process in little nitrogen |
| CN1049869A (en) * | 1989-08-29 | 1991-03-13 | 施教阁 | The 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100188A (en) * | 1985-04-01 | 1988-08-10 | 陕西机械学院 | Wet body carburization process in little nitrogen |
| CN85107920A (en) * | 1985-10-25 | 1987-05-06 | 陕西机械学院 | Low-carbon steel scissors and thermal treatment process thereof |
| CN1049869A (en) * | 1989-08-29 | 1991-03-13 | 施教阁 | The quick-acting gaseous combined cementation process of carbon and other elements |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1103898A (en) | 1995-06-21 |
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