CN104232856A - Annealing method for electromagnetic pure iron - Google Patents
Annealing method for electromagnetic pure iron Download PDFInfo
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- CN104232856A CN104232856A CN201410408167.1A CN201410408167A CN104232856A CN 104232856 A CN104232856 A CN 104232856A CN 201410408167 A CN201410408167 A CN 201410408167A CN 104232856 A CN104232856 A CN 104232856A
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- pure iron
- electromagnetic pure
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Abstract
The invention relates to an annealing method for electromagnetic pure iron and belongs to the field of treatment processes of electromagnetic pure iron. The method comprises the following steps: (1) firstly, respectively roasting a seal box, novel casted scrap iron and aluminum oxide powder used at 850-900 DEG C for 3-4 hours; (2) packaging electromagnetic pure iron parts in the seal box, wherein gaps are reserved among the parts, and scattering the aluminum oxide powder among the parts; and (3) feeding the seal box at a temperature lower than 600 DEG C into a furnace, heating to 900 DEG C along a furnace and preserving heat for 4 hours, cooling along the furnace to a temperature lower than 500 DEG C after power failure, discharging out of the furnace and air-cooling and unpacking at a temperature lower than 200 DEG C, wherein the thermal treatment time per furnace is 15 hours. By improving the process, the surface of the annealed part is blue, so that the part is prevented from being oxidized well. The aluminum oxide powder adhered to the surface of the part can be further easily removed, so that the technological requirements are satisfied. The annealing method for electromagnetic pure iron provided by the invention is simple to operate and easy to popularize.
Description
Technical field
The invention belongs to electromagnetic pure iron treatment process field, particularly relate to a kind of electromagnetic pure iron method for annealing.
Background technology
Electromagnetic pure iron is that magnetic valve series products moves, one of the primary structural material of fixed core, in traditional production, adopt vacuum oven, hydrogen furnace and box-type furnace etc. to carry out heating anneal, though and adopt vacuum oven anneal after can ensure that workpiece surface is not oxidized, single coercive force is difficult to meet standard-required.Because potentially danger is large when adopting hydrogen furnace to anneal, operating process is complicated, and batch is little, and the production cycle is long, and production cost is relatively high.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of electromagnetic pure iron method for annealing.
A kind of electromagnetic pure iron method for annealing, is characterized in that comprising the steps:
(1) first respectively by the watertight chest used, new cast iron filing, aluminum oxide powder at the roasting temperature 3h ~ 4h of 850 DEG C ~ 900 DEG C;
(2) electromagnetic pure iron part is contained in watertight chest, between each part, leaves space, between each part, sprinkle aluminum oxide powder;
(3) below 600 DEG C, watertight chest enters stove, and be warming up to 900 DEG C of insulation 4h with stove, be chilled to less than 500 DEG C air coolings of coming out of the stove after power failure with stove, unpack for less than 200 DEG C and take out part, the heat treatment time of every stove is 15h.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that described watertight chest is double-layer seal case.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that filling up cast iron filing in the space between the interior case of described double-layer seal case and outer container.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that being provided with asbestos plate between each part in described step (2).
A kind of electromagnetic pure iron method for annealing of the present invention, by the improvement to its technique, make the piece surface after annealing in blue, well avoid the drawback that part is oxidized, the alumina powder sticked on piece surface also can be removed easily, meets the requirement of technique.Electromagnetic pure iron method for annealing of the present invention is simple to operate, and is easy to promote.
Embodiment
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that comprising the steps:
(1) first respectively by the watertight chest used, new cast iron filing, aluminum oxide powder at the roasting temperature 3h ~ 4h of 850 DEG C ~ 900 DEG C;
(2) electromagnetic pure iron part is contained in watertight chest, between each part, leaves space, between each part, sprinkle aluminum oxide powder;
(3) below 600 DEG C, watertight chest enters stove, and be warming up to 900 DEG C of insulation 4h with stove, be chilled to less than 500 DEG C air coolings of coming out of the stove after power failure with stove, unpack for less than 200 DEG C and take out part, the heat treatment time of every stove is 15h.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that described watertight chest is double-layer seal case.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that filling up cast iron filing in the space between the interior case of described double-layer seal case and outer container.
A kind of electromagnetic pure iron method for annealing of the present invention, is characterized in that being provided with asbestos plate between each part in described step (2).
Claims (4)
1. an electromagnetic pure iron method for annealing, is characterized in that comprising the steps:
(1) first respectively by the watertight chest used, new cast iron filing, aluminum oxide powder at the roasting temperature 3h ~ 4h of 850 DEG C ~ 900 DEG C;
(2) electromagnetic pure iron part is contained in watertight chest, between each part, leaves space, between each part, sprinkle aluminum oxide powder;
(3) below 600 DEG C, watertight chest enters stove, and be warming up to 900 DEG C of insulation 4h with stove, be chilled to less than 500 DEG C air coolings of coming out of the stove after power failure with stove, unpack for less than 200 DEG C and take out part, the heat treatment time of every stove is 15h.
2. a kind of electromagnetic pure iron method for annealing as claimed in claim 1, is characterized in that described watertight chest is double-layer seal case.
3. a kind of electromagnetic pure iron method for annealing as claimed in claim 2, is characterized in that filling up cast iron filing in the space between the interior case of described double-layer seal case and outer container.
4. a kind of electromagnetic pure iron method for annealing as claimed in claim 1, is characterized in that being provided with asbestos plate between each part in described step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408167.1A CN104232856A (en) | 2014-08-19 | 2014-08-19 | Annealing method for electromagnetic pure iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408167.1A CN104232856A (en) | 2014-08-19 | 2014-08-19 | Annealing method for electromagnetic pure iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104232856A true CN104232856A (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410408167.1A Pending CN104232856A (en) | 2014-08-19 | 2014-08-19 | Annealing method for electromagnetic pure iron |
Country Status (1)
| Country | Link |
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| CN (1) | CN104232856A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191410A (en) * | 2016-08-15 | 2016-12-07 | 山西太钢不锈钢股份有限公司 | A kind of method improving electromagnetic pure iron hot rolled plate pcrmeability |
| CN111020098A (en) * | 2019-12-17 | 2020-04-17 | 陕西斯瑞新材料股份有限公司 | Preparation method of high-purity electromagnetic pure iron |
| CN112359186A (en) * | 2020-11-13 | 2021-02-12 | 沈阳航天新光集团有限公司 | Vacuum annealing method for magnetic material |
-
2014
- 2014-08-19 CN CN201410408167.1A patent/CN104232856A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191410A (en) * | 2016-08-15 | 2016-12-07 | 山西太钢不锈钢股份有限公司 | A kind of method improving electromagnetic pure iron hot rolled plate pcrmeability |
| CN111020098A (en) * | 2019-12-17 | 2020-04-17 | 陕西斯瑞新材料股份有限公司 | Preparation method of high-purity electromagnetic pure iron |
| CN112359186A (en) * | 2020-11-13 | 2021-02-12 | 沈阳航天新光集团有限公司 | Vacuum annealing method for magnetic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |