CN1102218A - Carburizing process and apparatus with solid penetrant and saving easily-controlled gas - Google Patents
Carburizing process and apparatus with solid penetrant and saving easily-controlled gas Download PDFInfo
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- CN1102218A CN1102218A CN 93119677 CN93119677A CN1102218A CN 1102218 A CN1102218 A CN 1102218A CN 93119677 CN93119677 CN 93119677 CN 93119677 A CN93119677 A CN 93119677A CN 1102218 A CN1102218 A CN 1102218A
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- China
- Prior art keywords
- penetration enhancer
- solid
- powdery
- state
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005255 carburizing Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007787 solid Substances 0.000 title abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 8
- 239000003610 charcoal Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000003961 penetration enhancing agent Substances 0.000 claims description 46
- 239000002023 wood Substances 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000010926 purge Methods 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The carburizing process and equipment which adopt solid carburizing agent and save easily-controlled gasTo replace the conventional liquid permeation agent without introducing CO and H, which is commonly used in the drip gas carburizing furnace at home and abroad2The powdery solid penetrant is cheap. The solid penetrant is composed of high-quality charcoal powder and promoter, and when the carbon atoms needed for carburization are given, the new solid penetrant does not carry CO and H2Therefore, the sealed carburization can be carried out, and the carbon potential can be measured and controlled by a single parameter by using an oxygen probe.
The device for conveying the solid penetrant, the furnace pressure control device and the furnace tank of the gas carburizing furnace are specially designed, and the technological key points are specified.
Description
The present invention relates to a kind of employing and do not produce CO and H
2New powdered solid-state penetration enhancer carry out can realize that one-parameter measures sealed energy-saving gas carburization process and the equipment with the control carbon potential with oxygen probe.
At present drop-feeding gas carburization is used is liquid C-H or C-H-O compound, as kerosene, methyl alcohol, ethanol, acetone, ethyl acetate or the like.Adopt liquid penetration enhancer to carry out gas cementation, not only cost an arm and a leg, and by the liquid penetration enhancer of what decompose or during cracking except that providing the required active atoms of carbon of carburizing, also will provide CO and H
2So,, cause waste for keeping constantly exhaust outward of furnace pressure.In addition, constantly splash into penetration enhancer, CO content will change in the atmosphere, measure to carbon potential and bring difficulty, in order to measure and control carbon potential, must adopt expensive, complicated multiparameter to measure and control method.If adopt famous in the world card to win mark's method, though can keep CO content constant, cost an arm and a leg, and interior oxidation be serious.
The purpose of this invention is to provide a kind of powdery penetration enhancer, this penetration enhancer is low price not only, and when providing active atoms of carbon, can not bring unnecessary gas into, and can not change CO content in the atmosphere yet, therefore can adopt sealed carburizing and carbon potential be carried out one-parameter measurement and control with oxygen probe.
The invention provides a kind of solid-state penetration enhancer of powdery that can use the what gas cementation.This penetration enhancer has good flowability, and free-running property and activity can not brought CO and H in use
2The prescription of the solid-state penetration enhancer of this powdery is:
55 order high-quality wood charcoal powder 90-97%
Can improve liquidity and the thick wood charcoal powder or the Graphite Powder 99 2-5% of free-running property
Energizer (various carbonate and rare earth) 1-5%
The speed of response of solid-state penetration enhancer of powdery and furnace gas and ethyl acetate (CH
2COO
2CH
5) quite (Fig. 1).
In order to adopt the solid-state penetration enhancer of powdery, designed and carried solid-state penetration enhancer device, gas carbruizing furance retort and furnace pressure control device.
Fig. 2 is for carrying solid-state penetration enhancer device construction figure.Among the figure 1 for plastics that the solid-state penetration enhancer of powdery is housed also; 2 is rotatable 90 ° joint, and the plastics that the solid-state penetration enhancer of powdery is housed also can be connected with rotatable connector in horizontality, flows out the parallel port to avoid solid-state penetration enhancer.Plastics and 1 are gone to the downward plumbness in parallel port from horizontality, and solid-state penetration enhancer can flow into transfer lime 4 automatically from aperture, sends into the gas carbruizing furance retort by screw rod 5 again.Screw rod 5 is driven by motor 6.3 is retaining ring, in order to limit the position and the rotational angle of rotatable connector.Two rotatable connectors have been installed on a transfer lime, and just what is changed and the interpolation penetration enhancer.
Fig. 3 is the gas carbruizing furance for using the solid-state penetration enhancer of powdery to design.Retort is welded into heat-resisting Ni-Cr steel plate, is equipped with to feed nitrogen and compressed-air actuated pipe 1 on the retort wall.Carry the oxygen probe 3 of solid-state penetration enhancer device 2 and band thermopair.At the bottom of jar, have big venting hole 4, for purging burner hearth and vacuumizing usefulness.
Fig. 4 is the furnace pressure control device.1 is the U-shaped pressure warning unit, and be displaced downwardly to 25-30mm eminence from the pressure warning unit middle part its zero point.Furnace pressure adds when raising suddenly furnace gas can discharge by the U-shaped pipe because of solid-state penetration enhancer is a large amount of, but the water in the pipe can not be ejected but flow down along tube wall, treats to form water seal again after unnecessary gas is discharged.There are two tool electrodes at above 10mm place at zero point, and during the low what 20mm water column of furnace pressure, two electrodes 2 are disconnected, magnetic valve 3 outages, and normally closed switch 4 is connected, and instillation controller 5 is started working, and by magnetic valve 6 methyl alcohol etc. is splashed into gas carbruizing furance 8 with the rising furnace pressure.
Existing drop-feeding gas carburization stove also can be transformed the back by Fig. 2,3,4 and adopt the solid-state penetration enhancer of powdery to carry out controlled carburizing.
The technology point that adopts the solid-state penetration enhancer of powdery to carry out gas cementation is to carry out abundant exhaust with liquid penetration enhancer earlier, makes the CO content in the furnace gas reach certain value, (as being 33.3% with CO content after the abundant exhaust of methyl alcohol).Stop dropping liquid attitude penetration enhancer then, with the stove sealing, carry out carburizing, and with oxygen probe carbon potential is carried out one-parameter and measure and control with carrying solid-state penetration enhancer device to send into solid-state penetration enhancer.When the low what 20mm water column of furnace pressure, the liquid penetration enhancer of using when the furnace pressure control device can splash into exhaust automatically is to recover furnace pressure but do not change CO content.
Gas cementation was employed for 70 coming year in machine industry.In the history in 70 years, adopt liquid medium to become traditional concept as penetration enhancer, never the someone considers to carry out gas cementation with wood charcoal powder as solid-state penetration enhancer both at home and abroad.The present invention has both used the solid-state penetration enhancer of what solid carburizing to obtain new life after transforming, overcome the working under hard conditions of solid carburizing, carbon potential can not be controlled, can not direct quenching etc. shortcoming; Make gas cementation rise to a new step again, brought advantages such as cheap, easy what mensuration of carbon potential and control for gas cementation.
The present invention applies very easily aborning
Accompanying drawing
Fig. 1 oxygen gesture and time relation
Fig. 2 carries solid-state penetration enhancer device
New gas cementing furnace after Fig. 3 improves
Fig. 4 furnace pressure control device
Claims (6)
1, a kind of employing does not produce CO and H
2The solid-state penetration enhancer device of the conveying by special use can realize that one-parameter is measured and the sealed gas carburization process and the equipment with special-purpose furnace pressure control device control furnace pressure of control carbon potential with oxygen probe from what gas carbruizing furance retort sidewall sent into that the solid-state penetration enhancer of powdery of retort carries out.Feature of the present invention is to adopt the solid-state penetration enhancer of the powdery that newly is developed into to replace general at present C-H and C-H-O compound liquid penetration enhancer both at home and abroad to carry out the sealed gas carburizing and with oxygen probe carbon potential is carried out one-parameter and measure and control.
2, the solid-state penetration enhancer of powdery according to claim 1 is characterized in that this penetration enhancer by the high-quality wood carbon dust that does not contain H, O, can improve liquidity and the thicker wood charcoal powder of free-running property or Graphite Powder 99 and energizer are formed, and its proportioning is:
55 order high-quality wood charcoal powder 90-97%
Can improve liquidity and the thick wood charcoal powder or the Graphite Powder 99 2-5% of free-running property
Energizer (various carbonate and rare earth) 1-5%
3, the solid-state penetration enhancer device of conveying according to claim 1, it is characterized in that outside the transfer lime of band screw rod, having increased rotatable connector (Fig. 2-2) and two retaining rings (Fig. 2-3) that can rotate 90 °, the plastics of the solid-state penetration enhancer of powdery are housed and can under horizontality, be connected to rotatable connector and flow out from the parallel port to avoid the solid-state penetration enhancer of powdery, only need and change 90 ° during use with plastics, make the parallel port downward, the solid-state penetration enhancer of powdery can flow into transfer lime automatically by the aperture on the transfer lime.
4, gas carbruizing furance retort according to claim 1, it is characterized in that retort is welded into heat-resisting steel sheet and plate, perforate on the tank skin install to carry solid-state penetration enhancer device (Fig. 3-2) and with what feed nitrogen or compressed-air actuated pipeline (Fig. 3-1) and the pore (Fig. 3-4) that begins to rehearse in the retort bottom when purging retort with what exhaust with and find time to use when setting up the furnace gas of certain ingredients rapidly.
5, furnace pressure control device according to claim 1, it is characterized in that U-shaped is displaced downwardly to from the mid-way manometric zero point that 25-30mm highly locates at the bottom of the U-shaped pipe, and zero point above 10mm place add the switch (Fig. 4-2) of two electrodes as the control magnetic switch.
6, gas carburizing process according to claim 1, it is characterized in that exhaust must be fully, make that CO content reaches preset value in the atmosphere, fully exhaust can be by reaching for a long time, also can adopt the method for finding time to splash into then liquid penetration enhancer earlier to reach, after exhaust finishes, stove is sealed, use the solid-state penetration enhancer of powdery instead, and splash into a small amount of liquid penetration enhancer to keep furnace pressure by the furnace pressure control device, the atmosphere carbon potential carries out one-parameter with oxygen probe and measures and control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119677 CN1102218A (en) | 1993-10-29 | 1993-10-29 | Carburizing process and apparatus with solid penetrant and saving easily-controlled gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119677 CN1102218A (en) | 1993-10-29 | 1993-10-29 | Carburizing process and apparatus with solid penetrant and saving easily-controlled gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1102218A true CN1102218A (en) | 1995-05-03 |
Family
ID=4993030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93119677 Pending CN1102218A (en) | 1993-10-29 | 1993-10-29 | Carburizing process and apparatus with solid penetrant and saving easily-controlled gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1102218A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441731C (en) * | 2003-09-24 | 2008-12-10 | 自贡硬质合金有限责任公司 | Carburizer forming gradient structure of hard alloy |
| CN103668039A (en) * | 2013-12-31 | 2014-03-26 | 山东万达重工股份有限公司 | Heat treatment process for manufacturing baking-free brick molding box |
| CN103898439A (en) * | 2014-04-01 | 2014-07-02 | 安庆市吉安汽车零件锻轧有限公司 | Rare earth and carbon co-penetration process of gear |
-
1993
- 1993-10-29 CN CN 93119677 patent/CN1102218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441731C (en) * | 2003-09-24 | 2008-12-10 | 自贡硬质合金有限责任公司 | Carburizer forming gradient structure of hard alloy |
| CN103668039A (en) * | 2013-12-31 | 2014-03-26 | 山东万达重工股份有限公司 | Heat treatment process for manufacturing baking-free brick molding box |
| CN103668039B (en) * | 2013-12-31 | 2015-09-16 | 山东万达重工股份有限公司 | A kind of thermal treatment process for making non-burning brick moulding box |
| CN103898439A (en) * | 2014-04-01 | 2014-07-02 | 安庆市吉安汽车零件锻轧有限公司 | Rare earth and carbon co-penetration process of gear |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |