CN1089372C - Natural gas-burning controllable heat treatment technology - Google Patents
Natural gas-burning controllable heat treatment technology Download PDFInfo
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- CN1089372C CN1089372C CN99118263A CN99118263A CN1089372C CN 1089372 C CN1089372 C CN 1089372C CN 99118263 A CN99118263 A CN 99118263A CN 99118263 A CN99118263 A CN 99118263A CN 1089372 C CN1089372 C CN 1089372C
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- heat treatment
- natural gas
- treatment furnace
- air
- carbon potential
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Abstract
The present invention relates to heat treatment technology of metal materials, particularly to straight-generating type controllable atmosphere heat treatment technology of natural gas. The present invention adopts natural gas as a raw material; the natural gas and air are mixed according to definite proportion and led in a heat treatment furnace; the proportion of the natural gas and the air is adjusted by measuring the height of the carbon potential in the heat treatment furnace; thereby, the carbon potential in the furnace can be controlled; the inner wall of the heat treatment furnace is coated with a nickel base catalyzer. The present invention has obvious and favorable technology and economic indexes.
Description
The present invention relates to a kind of heat treatment technics of metallic substance, particularly a kind of natural gas-burning controllable heat treatment technology can be used for carburizing, carbonitriding and non-oxidation and quenches.
Control atmosphere is adopted in thermal treatment, is the much progress on the international heat treatment technics, adopts controlled atmosphere thermal treatment, and workpiece surface is bright and clean, no decarburization has improved thermal treatment quality, can improve the thermal treatment quality of machine, equipment, prolong machine work-ing life, reduce grinding tolerance, economical with materials.
Before the nineties, it is raw material that controlled atmosphere generally adopts propane, butane, adopts the endothermic gas producer, and propane or butane add air and lead in the heat treatment furnace after the producer cracking earlier again, and it installs complicated, and investment is expensive.To the nineties, begin to develop straight living formula atmosphere abroad, as adopt methane to add air, butane to add air and acetone and add air etc. and directly feed the method that generates controlled atmosphere in the stove, can significantly reduce the cost of controlled atmosphere, but adopting Sweet natural gas and air to form straight living formula atmosphere does not appear in the newspapers as yet.
The purpose of this invention is to provide a kind of gas material, realize the heat treated technology of controlled atmosphere such as controlled atmosphere carburizing and quenching with the straight formula method of giving birth to cheapness.
Purpose of the present invention realizes by following scheme:
A kind of natural gas-burning controllable heat treatment technology, it is characterized in that it is is raw material with the Sweet natural gas, Sweet natural gas and air are mixed in the feeding heat treatment furnace by a certain percentage, by measuring the height of carbon potential in the heat treatment furnace, adjust the proportioning of Sweet natural gas and air, thereby carbon potential in the control stove scribbles Ni-based activator on the inwall of heat treatment furnace.
The present invention has following significant invention effect (is example with northwest bearing stock company) through verification experimental verification:
One. technical indicator:
1. atmosphere content is stable, and carbon potential can be controlled in 0.6-1.2% C scope, and control accuracy is 0.05%;
2. the atmosphere use temperature is 800-940 ℃;
3. the workpiece of in controlled atmosphere, handling, any surface finish, silvery white, non-oxidation, no decarburization;
4. the armamentarium instrument is realized production domesticization.
Two. economic target:
Company all was that employing methyl alcohol and acetone are the controlled atmosphere raw material from two Large Scale and Continuous cementing furnaces and cycle stove that Japan introduces originally, consumed methyl alcohol 2000kg every day, and acetone 150kg if use heat treatment technics of the present invention instead, consumes Sweet natural gas 1200M every day
3, year can be reduced expense of raw materials 76% by starting calculating in 300 days in 1 year.
Fig. 1 is a fundamental diagram of the present invention; Its principle of work is: Sweet natural gas is through strainer, magnetic valve, enter in the stove after entering access tube and a certain proportion of air mixed after the flow agent, air feeding amount is a certain value, oxygen control carbon is visited instrument and is recorded oxygen carbon potential in the stove according to the oxygen gesture in the stove, by the computing of microcomputer mathematical model is carbon potential, switching by the carbon-potential control magnetic valve of setting, carbon potential is lower than the carbon potential of setting in stove, then magnetic valve is opened, increase the Sweet natural gas feed rate, carbon potential is increased, when carbon potential in the stove is higher than the setting carbon potential, closed electromagnetic valve, reduce the Sweet natural gas feed rate, make the interior carbon heat drop of stove low, make the interior carbon-potential control of stove about set(ting)value, realize controlled atmosphere, on the inwall of heat treatment furnace, use Ni-based activator coating, be beneficial to the better cracking of Sweet natural gas.
Claims (1)
1. natural gas-burning controllable heat treatment technology, it is characterized in that it is is raw material with the Sweet natural gas, Sweet natural gas and air are mixed by a certain percentage, in the feeding heat treatment furnace, by measuring the height of carbon potential in the heat treatment furnace, adjust the proportioning of Sweet natural gas and air, thereby carbon potential in the control stove scribbles Ni-based activator on the inwall of heat treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99118263A CN1089372C (en) | 1999-09-11 | 1999-09-11 | Natural gas-burning controllable heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99118263A CN1089372C (en) | 1999-09-11 | 1999-09-11 | Natural gas-burning controllable heat treatment technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1250106A CN1250106A (en) | 2000-04-12 |
| CN1089372C true CN1089372C (en) | 2002-08-21 |
Family
ID=5280412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99118263A Expired - Fee Related CN1089372C (en) | 1999-09-11 | 1999-09-11 | Natural gas-burning controllable heat treatment technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089372C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008029001B3 (en) * | 2008-06-20 | 2009-09-17 | Ipsen International Gmbh | Method and device for the heat treatment of metallic materials |
| CN109868446A (en) * | 2019-03-12 | 2019-06-11 | 陕西法士特齿轮有限责任公司 | A kind of carburizer auxiliary material control system and its control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2043848A1 (en) * | 1969-05-30 | 1971-02-19 | Koho Es Gepipari Miniszterium | Controlled atmosphere gas production for - heat treatment furnace |
| SU1353725A1 (en) * | 1986-01-06 | 1987-11-23 | Всесоюзный научно-исследовательский институт технического и специального строительного стекла | Method of obtaining controllable atmosphere |
-
1999
- 1999-09-11 CN CN99118263A patent/CN1089372C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2043848A1 (en) * | 1969-05-30 | 1971-02-19 | Koho Es Gepipari Miniszterium | Controlled atmosphere gas production for - heat treatment furnace |
| SU1353725A1 (en) * | 1986-01-06 | 1987-11-23 | Всесоюзный научно-исследовательский институт технического и специального строительного стекла | Method of obtaining controllable atmosphere |
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| Publication number | Publication date |
|---|---|
| CN1250106A (en) | 2000-04-12 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020821 |