JPH03249157A - Method for vacuum heat treatment of active metal - Google Patents
Method for vacuum heat treatment of active metalInfo
- Publication number
- JPH03249157A JPH03249157A JP4444690A JP4444690A JPH03249157A JP H03249157 A JPH03249157 A JP H03249157A JP 4444690 A JP4444690 A JP 4444690A JP 4444690 A JP4444690 A JP 4444690A JP H03249157 A JPH03249157 A JP H03249157A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- active metal
- heat treatment
- heat insulating
- treated
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 8
- 150000002739 metals Chemical class 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は活性金属の真空熱処理方法に関し、特にジルコ
ニウム、チタン等の活性金属製製品の真空熱処理に有利
に適用される同方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for vacuum heat treatment of active metals, and more particularly to the same method that is advantageously applied to vacuum heat treatment of products made of active metals such as zirconium and titanium.
従来のバッチ式真空熱処理炉を、本発明方法を説明する
ための図である第１図、第２図を借りて説明する。第１
図はその断面図、第２！！ｌは第１図のＡ−Ａ矢視断面
図である。図において、１は断熱材、２はヒータ、３は
台車、４は真空ポンプ、６は被熱処理物（例えばＺｒ、
Ｔｉ）、７は真空チャンバ、８は温度計である。但し、
従来のバッチ式真空熱処理装置には防熱板５（５ａ。A conventional batch type vacuum heat treatment furnace will be explained with reference to FIGS. 1 and 2, which are diagrams for explaining the method of the present invention. 1st
The figure is a cross-sectional view, part 2! ! 1 is a sectional view taken along the line A-A in FIG. 1; In the figure, 1 is a heat insulating material, 2 is a heater, 3 is a trolley, 4 is a vacuum pump, and 6 is a material to be heat treated (for example, Zr,
7 is a vacuum chamber, and 8 is a thermometer. however,
A conventional batch type vacuum heat treatment apparatus includes a heat shield plate 5 (5a).
５ｂ）は存在していない。5b) does not exist.
このような構造の真空熱処理炉ではジルコニウムやチタ
ンのような活性金属製品においては真空熱処理と言えど
も製品表面に強固な酸化スケールなどの皮膜がついてし
まい除去することが困難である。In a vacuum heat treatment furnace having such a structure, active metal products such as zirconium and titanium are coated with a strong film of oxide scale on the surface of the product, which is difficult to remove even though the product is subjected to vacuum heat treatment.
ジルコニウムやチタンなどの活性金属は２００℃以上に
加熱されると周辺に微量でも酸素あるいは窒素ガスが存
在するとこれらを吸収しきわめて強固なスケールを表面
上に付着してしまい問題となる。When active metals such as zirconium and titanium are heated to 200° C. or higher, if even a trace amount of oxygen or nitrogen gas is present in the vicinity, they will absorb these gases and form extremely strong scales on their surfaces, creating a problem.
一方、通常の真空熱処理では真空中で熱処理するためほ
とんど酸素や窒素ガスは存在しないが、製品が加熱され
る過程で炉壁がある一定の温度になると微量のアウトガ
ス（酸素、窒素等）を発生する。このとき製品も２００
℃以上にあがっているためこのアウトガスを吸収しスケ
ールがついてしまう。On the other hand, in normal vacuum heat treatment, there is almost no oxygen or nitrogen gas because the heat treatment is carried out in a vacuum, but when the furnace wall reaches a certain temperature during the process of heating the product, a small amount of outgas (oxygen, nitrogen, etc.) is generated. do. At this time, the product also has 200
Since the temperature is above ℃, this outgas is absorbed and scale is formed.
本発明は上記技術水準に鑑み、活性金属を真空熱処理す
るに当って、炉壁よりのアウトガスによって活性金属表
面にスケールが付着しない方法を提供しようとするもの
である。In view of the above-mentioned state of the art, the present invention aims to provide a method in which scale does not adhere to the surface of the active metal due to outgas from the furnace wall when performing vacuum heat treatment on the active metal.
本発明は上記技術的課題を解決するために鋭意研究の結
果、炉壁から発生するアウトガスの発生するタイミング
と真空加熱処理されるジルコニウム、チタンなどの製品
の温度が上昇するタイミングをずらすことにより上記課
題が解決できることを確認し、本発明を完成するに至っ
た。As a result of intensive research to solve the above technical problems, the present invention has been developed by shifting the timing at which outgas is generated from the furnace wall and the timing at which the temperature of products such as zirconium and titanium subjected to vacuum heat treatment rises. It was confirmed that the problem could be solved, and the present invention was completed.
すなわち、本発明は活性金属を真空熱処理するに際し、
被熱処理物である活性金属とヒータとの間に防熱板を介
在させ、炉壁面の温度上昇よりも活性金属の温度上昇を
遅らせることを特徴とする活性金属の真空熱処理方法で
ある。That is, in the present invention, when performing vacuum heat treatment on active metals,
This is a method for vacuum heat treatment of active metals, which is characterized in that a heat shield plate is interposed between the active metal to be heat treated and the heater, so that the temperature rise of the active metal is delayed more than the temperature rise of the furnace wall surface.
〔作用〕
真空熱処理炉内のヒータと被熱処理物である活性金属（
製品）の間に防熱板を設けることにより、ヒータからの
輻射熱は防熱板を加熱し、加熱された防熱板の二次輻射
によって被熱処理物の温度が上がるので、被熱処理物の
温度上昇速度がその分だけ遅れることになる。[Operation] The heater in the vacuum heat treatment furnace and the active metal that is the object to be heat treated (
By providing a heat shield between the products), the radiant heat from the heater heats the heat shield, and the secondary radiation of the heated heat shield increases the temperature of the object to be heat treated, reducing the rate of temperature rise of the object. You will be delayed by that amount.
方、炉壁はヒータの輻射熱を直接受けるので、すぐに温
度が上がり約１５０°〜２５０゜に達しアウトガスを発
生させることができる。On the other hand, since the furnace wall directly receives the radiant heat from the heater, the temperature quickly rises to about 150° to 250°, and outgas can be generated.
このガスは真空ポンプにより炉外に放出される。This gas is discharged outside the furnace by a vacuum pump.
したがって、アウトガスの発生後に被熱処理物の温度が
上がることになりスケールのない熱処理を行なうことが
できる。Therefore, the temperature of the object to be heat-treated increases after outgas is generated, so that scale-free heat treatment can be performed.
以下、本発明を第１図、第２図によって説明する。 The present invention will be explained below with reference to FIGS. 1 and 2.
真空チャンバ７内には断熱材１、加熱用のヒータ２、防
熱板５ａ及び炉内温度計測用の温度計８が設けられてい
る。又、真空チャンバ７内を真空引きする真空ポンプ４
が外部に備えられている。Inside the vacuum chamber 7, a heat insulating material 1, a heater 2 for heating, a heat shield plate 5a, and a thermometer 8 for measuring the temperature inside the furnace are provided. Also, a vacuum pump 4 that evacuates the inside of the vacuum chamber 7.
is provided externally.
被熱処理物６を搬送する台車３には、その−辺に防熱板
５ｂが設けられ、前記防熱板５ａと一体となり被熱処理
物６を保護するようになっている。A heat insulating plate 5b is provided on the negative side of the trolley 3 for transporting the object 6 to be heat treated, and the heat insulating plate 5b is integrated with the heat insulating plate 5a to protect the object 6 to be heat treated.
上記構成の真空熱処理炉中で活性金属（製品）である被
熱処理物６を真空加熱処理することにより、防熱板５ａ
、５ｂの存在により、炉壁からのアウトガスの発生時点
が被熱処理物６の昇温時点より速いので、炉壁から発生
したアウトガスは直ちに真空ポンプ４により外部に排出
されるので、被熱処理物６がアウトガスと反応して表面
に皮膜を形成されることはない。By subjecting the heat treatment object 6, which is an active metal (product), to vacuum heat treatment in the vacuum heat treatment furnace configured as described above, the heat shield plate 5a
, 5b, the time point at which outgas is generated from the furnace wall is earlier than the time point at which the temperature of the object to be heat treated 6 is raised.The outgas generated from the furnace wall is immediately discharged to the outside by the vacuum pump 4. does not react with outgas to form a film on the surface.
従来のバッチ式真空熱処理炉に防熱板を設けることでス
ケールの全く付着しない活性金属（製品）の熱処理が可
能となる。By providing a heat shield to a conventional batch-type vacuum heat treatment furnace, it becomes possible to heat treat active metals (products) with no scale adhesion.
第１図は本発明の一実施例で使用した真空熱処理炉の正
面断面図、第２図は第１図のＡ−Ａ矢視側面断面図であ
る。FIG. 1 is a front sectional view of a vacuum heat treatment furnace used in an embodiment of the present invention, and FIG. 2 is a side sectional view taken along the line A--A in FIG.
Claims (1)
活性金属とヒータとの間に防熱板を介在させ、炉壁面の
温度上昇よりも活性金属の温度上昇を遅らせることを特
徴とする活性金属の真空熱処理方法。A vacuum for active metals characterized in that when performing vacuum heat treatment on active metals, a heat shield plate is interposed between the active metals to be heat treated and the heater, so that the temperature rise of the active metals is delayed more than the temperature rise of the furnace wall surface. Heat treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4444690A JPH03249157A (en) | 1990-02-27 | 1990-02-27 | Method for vacuum heat treatment of active metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4444690A JPH03249157A (en) | 1990-02-27 | 1990-02-27 | Method for vacuum heat treatment of active metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03249157A true JPH03249157A (en) | 1991-11-07 |
Family
ID=12691718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4444690A Pending JPH03249157A (en) | 1990-02-27 | 1990-02-27 | Method for vacuum heat treatment of active metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03249157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045979A (en) * | 2012-12-28 | 2013-04-17 | 河北省电力公司电力科学研究院 | Method for preparing twin crystals in TA1 tissues |
-
1990
- 1990-02-27 JP JP4444690A patent/JPH03249157A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045979A (en) * | 2012-12-28 | 2013-04-17 | 河北省电力公司电力科学研究院 | Method for preparing twin crystals in TA1 tissues |
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