CN85107920A - Low-carbon steel scissors and thermal treatment process thereof - Google Patents
Low-carbon steel scissors and thermal treatment process thereof Download PDFInfo
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- CN85107920A CN85107920A CN 85107920 CN85107920A CN85107920A CN 85107920 A CN85107920 A CN 85107920A CN 85107920 CN85107920 CN 85107920 CN 85107920 A CN85107920 A CN 85107920A CN 85107920 A CN85107920 A CN 85107920A
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Abstract
The invention relates to selecting for use and thermal treatment process of scissors material, scissors material selection soft steel is one time punching molded, then impose suitable chemical surface hardening heat treatment process, thermo-chemical treatment can be adopted low temperature rapid carburizing process or quick carbonitriding process or nitrogenize.Because the soft steel punching formation property is good, can reduce the loss and the power consumption of mould, and also the soft steel low price, wide material sources.Low-carbon steel scissors is after the thermo-chemical treatment surface strengthening, and its edge of a knife hardness can reach more than the HRC60, and heart portion still keeps enough toughness, and the durability of scissors is significantly improved.
Description
The present invention relates to selecting for use and thermal treatment process of scissors material.
Known scissors adopts two kinds of processing methodes to make, and a kind of is that the edge of a knife pastes the steel method, and the edge of a knife is made with medium and high carbon steel, and rest part is made with soft steel, this method complex process, and productivity is low, the cost height, and also quality is wayward; Another kind is the butt welding method, and the head of scissors is with medium carbon steel (now being generally 45 steel) impact briquetting, and handgrip is made with soft steel.The scissors head need carry out Q-tempering to be handled, and quenching temperature generally is controlled at 850 ℃～880 ℃, and heating back quenching temperature is to cool off in 25 ℃～40 ℃ the oil, and tempering temperature is 180 ℃～200 ℃.Then scissors head and handgrip butt welding are got up.Because the hardenability of 45 steel is relatively poor, the hardness of the edge of a knife is on the low side after the thermal treatment, generally can only reach HRC45～50, so the scissors of making in this way is not durable, and material cost is taken higher.
Task of the present invention is: reduce the production cost of scissors, increase throughput, improve the scissors quality.The method of solution task is: the whole soft steel that adopts of scissors is one time punching molded, and imposes suitable chemical surface hardening heat treatment process.
Emphasis of the present invention is: the scissors blank adopts carbon content less than 0.35% soft steel (comprising carbon steel, steel alloy, stainless steel) impact briquetting, then carries out chemical surface hardening heat treatment process.Thermo-chemical treatment can be adopted cementing process or tufftride method or nitriding.Cementing process can adopt low temperature rapid carburizing process, and carburizing temperature can be controlled in 860 ℃～880 ℃, and carburizing time can be 2～4 hours, and carburizing agent can be made up of kerosene, 1%～2% tetracol phenixin, 4%～5% technical benzene and 4%～6% methane amide.Tufftride method can adopt quick carbonitriding process, oozes Controllable Temperature altogether built in 860 ℃～880 ℃, and carburizing time can be 2～4 hours, and diffusion medium can be made up of kerosene, 1%～2% tetracol phenixin, 4%～5% technical benzene and 8%～10% methane amide.
The present invention pastes steel method technology with the existing edge of a knife of producing and compares, and its Technology is easily grasped, and throughput is big, steady quality, and production cost is low.Compare with the stamping forming butt welding method of medium carbon steel with the scissors head,, can reduce the loss of mould and the consumption of electric energy, and the present invention can be one time punching molded, saved the butt welding operation, improved productivity because soft steel is better than medium carbon steel punching formation property.Simultaneously, the present invention can adopt low price, and the common low carbon carbon steel of wide material sources is made, and can significantly reduce production costs.Scissors of the present invention, its edge of a knife hardness can reach HRC60, and heart portion still keeps enough toughness, and the durability of scissors is significantly improved.
Be specific embodiments of the invention below.
Embodiment 1: it is one time punching molded that the dressmaker blank adopts thickness to be about the A3 steel of 3mm or 20 steel hot rolled steel plates or steel band, and thermal treatment process adopts low temperature rapid carburization method, direct water quenching and oil-cooling after the carburizing.
Processing condition
Carburizing temperature: 860 ℃～880 ℃
Carburizing agent: kerosene adds 1%～2% tetracol phenixin and adds 4%～5% technical benzene and add 4%～6% methane amide and mix.
Thinner: methyl alcohol or ethanol
Penetration enhancer is for measuring: use the RJJ35-9 stove, 30～50 droplets/minute of carburizing agents, 40～50 droplets/minute of thinners.
Carburizing time: 3～4 hours
The result
Case depth can reach 0.9～1.1mm, and carbon contents can reach 0.8%～1.0%, and the back hardness of quenching can reach HRC61～63, is HRC60～62 through 180 ℃～200 ℃ temper numbers, is HRC58～60 through 220 ℃～240 ℃ temper numbers.
Embodiment 2: it is that the A3 steel of 3mm or 20 steel hot rolled steel plates or steel band are one time punching molded that the dressmaker blank adopts thickness, and thermal treatment process adopts quick tufftride method, direct water quenching and oil-cooling after oozing altogether.
Processing condition
Ooze temperature altogether: 860 ℃～880 ℃
Diffusion medium: kerosene adds 1%～2% tetracol phenixin and adds 4%～5% technical benzene and add 8%～10% methane amide and mix.
Thinner: methyl alcohol or ethanol
Penetration enhancer is for measuring: use the RJJ35-9 stove, and 30～50 droplets/minute of diffusion mediums,
40～50 droplets/minute of thinners.
Ooze the time altogether: 3～4 hours.
The result
Cocementation layer depth can reach 0.9～1.1mm, and carbon contents is 0.8%～1.0%, and nitrogen content is 0.2～0.3%, and the back hardness of quenching can reach HRC61～63, is HRC60～62 through 180 ℃～200 ℃ temper numbers.
Claims (2)
1, low-carbon steel scissors and thermal treatment process thereof, feature of the present invention is: the scissors blank adopts carbon content less than 0.35% carbon steel or the impact briquetting of alloy steel or stainless steel, then carries out chemical surface hardening heat treatment process.
2, according to the scissors and the thermal treatment process thereof of claim 1, it is characterized in that: low temperature rapid carburizing process is adopted in thermo-chemical treatment, carburizing temperature is 860 ℃～880 ℃, carburizing agent is made up of kerosene, 1%～2% tetracol phenixin, 4%～5% technical benzene and 4%～6% methane amide, perhaps adopt quick carbonitriding process, oozing temperature altogether is 860 ℃～880 ℃, and diffusion medium is made up of kerosene, 1%～2% tetracol phenixin, 4%～5% technical benzene and 8%～10% methane amide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107920 CN85107920A (en) | 1985-10-25 | 1985-10-25 | Low-carbon steel scissors and thermal treatment process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107920 CN85107920A (en) | 1985-10-25 | 1985-10-25 | Low-carbon steel scissors and thermal treatment process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85107920A true CN85107920A (en) | 1987-05-06 |
Family
ID=4795831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107920 Withdrawn CN85107920A (en) | 1985-10-25 | 1985-10-25 | Low-carbon steel scissors and thermal treatment process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85107920A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034349C (en) * | 1993-12-16 | 1997-03-26 | 西安矿业学院 | Quick gas thin layer carbonitriding for hacksaw blade |
| CN101096789B (en) * | 2007-07-13 | 2010-11-17 | 苏州利德纺织机件有限公司 | Fabrication technology of yarn making piece |
| CN102409313A (en) * | 2011-11-18 | 2012-04-11 | 吴江市物华五金制品有限公司 | Too surface treatment method |
| CN103866331A (en) * | 2012-12-11 | 2014-06-18 | 余德望 | Superhard superplastic knife mold material and knife mold capable of punching and shearing metal thin sheets |
| 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 |
-
1985
- 1985-10-25 CN CN 85107920 patent/CN85107920A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034349C (en) * | 1993-12-16 | 1997-03-26 | 西安矿业学院 | Quick gas thin layer carbonitriding for hacksaw blade |
| CN101096789B (en) * | 2007-07-13 | 2010-11-17 | 苏州利德纺织机件有限公司 | Fabrication technology of yarn making piece |
| CN102409313A (en) * | 2011-11-18 | 2012-04-11 | 吴江市物华五金制品有限公司 | Too surface treatment method |
| CN103866331A (en) * | 2012-12-11 | 2014-06-18 | 余德望 | Superhard superplastic knife mold material and knife mold capable of punching and shearing metal thin sheets |
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |