CN105714041A - 15CrMo valve seat heat treatment technology - Google Patents
15CrMo valve seat heat treatment technology Download PDFInfo
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- CN105714041A CN105714041A CN201410725713.4A CN201410725713A CN105714041A CN 105714041 A CN105714041 A CN 105714041A CN 201410725713 A CN201410725713 A CN 201410725713A CN 105714041 A CN105714041 A CN 105714041A
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- temperature
- carburizing
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- valve seat
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Abstract
The invention discloses a 15CrMo valve seat heat treatment technology. The technology comprises 1, normalization: according to a method of heating at a desired temperature, when a furnace temperature is 860+/-10 DEG C, putting a workpiece into a heat treatment furnace, carrying out heating, keeping the temperature for 30min, taking the workpiece out of the furnace and carrying out air cooling, 2, carburizing: carrying out carburizing at a carburizing temperature of 930+/-10 DEG C in carburizing mediums of methanol and kerosene, keeping the temperature for 6h, carrying out slow furnace cooling to a temperature of 850 DEG C, taking the workpiece out of the furnace and carrying out air cooling, 3, quenching: precooling the workpiece to a temperature of 840+/-10 DEG C in a carburizing furnace and directly cooling the workpiece in an oil tank with machine oil No. 10 as cooling oil and 4, tempering: carrying out tempering at a heating temperature of 180+/-10 DEG C, keeping the temperature for 1.5h and carrying out air cooling. The technology has simple processes and improves performances of a valve seat.
Description
Technical field
The present invention relates to the Technology for Heating Processing of a kind of 15CrMo valve seat.
Background technology
15CrMo steel system pearlitic structrure heat resisting steel, at high temperature has higher heat resistance (δ b >=440MPa) and non-oxidizability, and has certain resistant to hydrogen corrosive power.Owing to containing Cr, C and other alloying element of high level in steel, the tendency of hardenability of steel is more apparent, and weldability is poor.So needing a kind of Technology for Heating Processing, increase its performance.Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide the Technology for Heating Processing of a kind of 15CrMo valve seat, and this process is simple, it is possible to increase the performance of valve seat each side.
For achieving the above object, the invention provides the Technology for Heating Processing of a kind of 15CrMo valve seat, it is characterized in that, comprise the steps, 1) normalizing: the method using temperature heating, when furnace temperature is heated to the temperature of 860 ± 10 DEG C, then puts into heat-treatment furnace by workpiece and is heated, temperature retention time 30min, air cooling of coming out of the stove；
2) carburizing: carburizing temperature 930 ± 10 DEG C, carburizing medium: methanol and kerosene, temperature retention time 6h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove；
3) quenching: directly quench when being cooled to 840 ± 10 DEG C in carburizer in advance and cool down into oil groove, cooling oil is No. 10 machinery oil；
4) tempering: tempering heating-up temperature elects 180 ± 10 DEG C as, temperature retention time is 1.5h, air cooling.
The invention has the beneficial effects as follows: present invention process method is simple, it is possible to increase the performance of valve seat each side.
Detailed description of the invention
The technical scheme is that the Technology for Heating Processing of a kind of 15CrMo valve seat, comprise the steps, 1) normalizing: the method using temperature heating, when furnace temperature is heated to the temperature of 860 ± 10 DEG C, again workpiece is put into heat-treatment furnace to be heated, temperature retention time 30min, air cooling of coming out of the stove；
2) carburizing: carburizing temperature 930 ± 10 DEG C, carburizing medium: methanol and kerosene, temperature retention time 6h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove；
3) quenching: directly quench when being cooled to 840 ± 10 DEG C in carburizer in advance and cool down into oil groove, cooling oil is No. 10 machinery oil；
4) tempering: tempering heating-up temperature elects 180 ± 10 DEG C as, temperature retention time is 1.5h, air cooling.This process is simple, it is possible to increase the performance of valve seat each side.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. the Technology for Heating Processing of a 15CrMo valve seat, it is characterised in that comprise the steps, 1) normalizing: the method using temperature heating, when furnace temperature is heated to the temperature of 860 ± 10 DEG C, then puts into heat-treatment furnace by workpiece and is heated, temperature retention time 30min, air cooling of coming out of the stove；
2) carburizing: carburizing temperature 930 ± 10 DEG C, carburizing medium: methanol and kerosene, temperature retention time 6h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove；
3) quenching: directly quench when being cooled to 840 ± 10 DEG C in carburizer in advance and cool down into oil groove, cooling oil is No. 10 machinery oil；
4) tempering: tempering heating-up temperature elects 180 ± 10 DEG C as, temperature retention time is 1.5h, air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725713.4A CN105714041A (en) | 2014-12-04 | 2014-12-04 | 15CrMo valve seat heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725713.4A CN105714041A (en) | 2014-12-04 | 2014-12-04 | 15CrMo valve seat heat treatment technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105714041A true CN105714041A (en) | 2016-06-29 |
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ID=56142975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410725713.4A Pending CN105714041A (en) | 2014-12-04 | 2014-12-04 | 15CrMo valve seat heat treatment technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105714041A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750249A (en) * | 2019-03-28 | 2019-05-14 | 武汉上大恒精热处理技术有限公司 | A kind of carburizing heat treatment method of engine spool |
-
2014
- 2014-12-04 CN CN201410725713.4A patent/CN105714041A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750249A (en) * | 2019-03-28 | 2019-05-14 | 武汉上大恒精热处理技术有限公司 | A kind of carburizing heat treatment method of engine spool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
|
| WD01 | Invention patent application deemed withdrawn after publication |