CN103898286A - Isothermal quenching process for cutting picks of coal cutters - Google Patents
Isothermal quenching process for cutting picks of coal cutters Download PDFInfo
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- CN103898286A CN103898286A CN201410129918.6A CN201410129918A CN103898286A CN 103898286 A CN103898286 A CN 103898286A CN 201410129918 A CN201410129918 A CN 201410129918A CN 103898286 A CN103898286 A CN 103898286A
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Abstract
The invention discloses an isothermal quenching process for cutting picks of coal cutters, which is characterized by comprising the steps of putting the machined cutting picks into a heating furnace for heating at a temperature of 860 DEG C, dripping ethanol into the furnace in the heating process at a speed of 120-140 drips/min, after the heating, putting into isothermal nitrate to for heat preservation for 25-30min at a heat preservation temperature of 290 DEG C, cooling in warm water for 5-10min after isothermal quenching. According to the isothermal quenching process for cutting picks of coal cutters, the defects of the prior art are overcome; ethanol is dripped in when the parts are heated in an RTJ-75-9 gas carburizing furnace and the ethanol decomposes at high temperature so that the oxygen atmosphere in the heating furnace can be rapidly eliminated, the non-oxidation and decarburized heating parts are realized and the quality of the hard alloys is effectively protected; after the isothermal cooling in the nitrate, the process of directly cooling in warm water is used, so that the washing process is saved and great convenience is brought to the workshop production.
Description
Technical field
The present invention relates to pick production technical field, specifically belong to a kind of coal winning machine cutting bit isothermal quenching technique.
Background technology
Pick is the key component on coalcutter, and its working conditions is severe, requires high-wearing feature, intensity and good toughness.In order to meet technical requirements, thermal treatment process is essential is isothermal quenching, traditional employing salt bath furnace heating, salt made from earth containing a comparatively high percentage of sodium chloride moderate temperature quenching method, use 1 salt bath furnace heated parts, by the method for 2 low temperature salt-bath stove isothermals, can realize like this workpiece and Wimet non-oxidation, decarburization batch production rapidly in quenching heat-processed.Isothermal time is that heat-up time is more than 2 times.
But there is following drawback in inferior technique: well-known, salt bath furnace is not suitable for directly inserting control temperature in salt bath furnace with adding thermocouple, be difficult to like this control accurately quenching temperature, the general optical pyrometer thermometric of using, control temperature by artificial visually examine, be difficult to like this control accurately quenching temperature, and the carbide quartz welding of pick is the scolder with brass base, its fusing point is 920 ℃ of left and right, if operator lacks a sense of responsibility, technology not higher position is prone to brass fusing and phenomenon that Wimet turns around, pick isothermal quenching needs 2 salt bath furnaces, facility investment is large, and this equipment use cost is high, labor strength is large.
Summary of the invention
The object of the present invention is to provide a kind of coal winning machine cutting bit isothermal quenching technique; in the time that heating, RTJ-75-9T type gas carbruizing furance splashes into ethanol; ethanol at high temperature decomposes; can promptly get rid of the oxygen atmosphere in process furnace, realize the heated parts of non-oxidation, decarburization, effectively protect Wimet quality to the end; in salt made from earth containing a comparatively high percentage of sodium chloride isothermal cooling after; adopt directly process for cooling in warm water, omitted like this matting, facilitated greatly Workshop Production.
The present invention adopts following technical scheme:
Coal winning machine cutting bit isothermal quenching technique, it is characterized in that: allow the pick of completion of processing put into process furnace heating, furnace temp control is 860 ℃, in heat-processed, in stove, splash into drip/min of ethanol 120-140, after heating, put in the salt made from earth containing a comparatively high percentage of sodium chloride of isothermal and be incubated, holding temperature control is 290 ℃, and soaking time is 25-30min, cooling in warm water after isothermal quenching, soak time is 5-10min.
Quenching heating furnace is selected RTJ-75-9T type gas carbruizing furance.
Isothermal cooling apparatus is selected RX-32 nitre groove.
Compared with the prior art, beneficial effect of the present invention is as follows:
Coal winning machine cutting bit isothermal quenching technique of the present invention, has facilitated workman's operation, has reduced labor strength, and one has done the Homes Using TV of synthetic operation face; Adopted the reach elevating conveyor runway of technique only to need two people's compounding practices to complete simultaneously,, improve efficiency, practicality is extensive.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Coal winning machine cutting bit isothermal quenching technique, it is characterized in that: allow the pick of completion of processing put into process furnace heating, furnace temp control is 860 ℃, in heat-processed, in stove, splash into drip/min of ethanol 120-140, after heating, put in the salt made from earth containing a comparatively high percentage of sodium chloride of isothermal and be incubated, holding temperature control is 290 ℃, and soaking time is 25-30min, cooling in warm water after isothermal quenching, soak time is 5-10min; Quenching heating furnace is selected RTJ-75-9T type gas carbruizing furance; Isothermal cooling apparatus is selected RX-32 nitre groove.
Claims (3)
1. coal winning machine cutting bit isothermal quenching technique, it is characterized in that: allow the pick of completion of processing put into process furnace heating, furnace temp control is 860 ℃, in heat-processed, in stove, splash into drip/min of ethanol 120-140, after heating, put in the salt made from earth containing a comparatively high percentage of sodium chloride of isothermal and be incubated, holding temperature control is 290 ℃, and soaking time is 25-30min, cooling in warm water after isothermal quenching, soak time is 5-10min.
2. coal winning machine cutting bit isothermal quenching technique according to claim 1, is characterized in that: quenching heating furnace is selected RTJ-75-9T type gas carbruizing furance.
3. coal winning machine cutting bit isothermal quenching technique according to claim 1, is characterized in that: isothermal cooling apparatus is selected RX-32 nitre groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129918.6A CN103898286A (en) | 2014-04-01 | 2014-04-01 | Isothermal quenching process for cutting picks of coal cutters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129918.6A CN103898286A (en) | 2014-04-01 | 2014-04-01 | Isothermal quenching process for cutting picks of coal cutters |
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| Publication Number | Publication Date |
|---|---|
| CN103898286A true CN103898286A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410129918.6A Pending CN103898286A (en) | 2014-04-01 | 2014-04-01 | Isothermal quenching process for cutting picks of coal cutters |
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| CN (1) | CN103898286A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480291A (en) * | 2014-12-24 | 2015-04-01 | 上虞永昊精密电热器件有限公司 | Metal wire thermal treatment surface oxidation resistance method |
| CN106756660A (en) * | 2016-12-14 | 2017-05-31 | 单麒铭 | A kind of WC Co hard alloy heat-treatment quenching methods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319977A (en) * | 2011-07-08 | 2012-01-18 | 内蒙古蓝海金属再制造有限责任公司 | Method for manufacturing novel cutting pick from waste cutting pick by adopting grafting mode |
| CN103032069A (en) * | 2012-10-22 | 2013-04-10 | 安徽省皖江机电设备制造有限公司 | Production method of cutting picks of coal mining machine |
| CN103659168A (en) * | 2012-09-23 | 2014-03-26 | 佳木斯大学 | Production technology process of cutting tooth |
-
2014
- 2014-04-01 CN CN201410129918.6A patent/CN103898286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319977A (en) * | 2011-07-08 | 2012-01-18 | 内蒙古蓝海金属再制造有限责任公司 | Method for manufacturing novel cutting pick from waste cutting pick by adopting grafting mode |
| CN103659168A (en) * | 2012-09-23 | 2014-03-26 | 佳木斯大学 | Production technology process of cutting tooth |
| CN103032069A (en) * | 2012-10-22 | 2013-04-10 | 安徽省皖江机电设备制造有限公司 | Production method of cutting picks of coal mining machine |
Non-Patent Citations (1)
| Title |
|---|
| 钱书华等: "采煤机截齿等温淬火工艺的改进", 《煤炭技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480291A (en) * | 2014-12-24 | 2015-04-01 | 上虞永昊精密电热器件有限公司 | Metal wire thermal treatment surface oxidation resistance method |
| CN106756660A (en) * | 2016-12-14 | 2017-05-31 | 单麒铭 | A kind of WC Co hard alloy heat-treatment quenching methods |
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Application publication date: 20140702 |