JPS6123472B2 - - Google Patents
Info
- Publication number
- JPS6123472B2 JPS6123472B2 JP55019838A JP1983880A JPS6123472B2 JP S6123472 B2 JPS6123472 B2 JP S6123472B2 JP 55019838 A JP55019838 A JP 55019838A JP 1983880 A JP1983880 A JP 1983880A JP S6123472 B2 JPS6123472 B2 JP S6123472B2
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- manufacturing
- alloy
- ingot
- producing
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910018885 Pt—Au Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000005482 strain hardening Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910001260 Pt alloy Inorganic materials 0.000 description 3
- 239000003518 caustics Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、貴金属による坩堝の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a crucible made of noble metal.
種々の分野に於て使用される貴金属製の坩堝に
於て、白金系合金の坩堝がある。 Among the crucibles made of noble metals used in various fields, there are platinum alloy crucibles.
この種の坩堝は、高温における化学的安定性を
有している為に広く用いられているが、上記の材
料は鋳造時にピンホールやブローホールが発生し
易く、これ等の内部欠陥を無くすことは極めて困
難であり、また製品を高温で使用していると、結
晶粒が粗大化し、自重や他の物質の重量を受けて
徐合に変形するが、このときピンホールやブロー
ホール等の内部欠陥に応力が伝わり、マイクロク
ラツクの発生を生じさせ、時間の経過と共に遂に
は割れにまで発展することとなる。 This type of crucible is widely used due to its chemical stability at high temperatures, but the above materials are prone to pinholes and blowholes during casting, and it is important to eliminate these internal defects. Furthermore, when the product is used at high temperatures, the crystal grains become coarser and undergo gradual deformation due to their own weight and the weight of other substances. Stress is transmitted to the defect, causing the generation of microcracks, which eventually develop into cracks over time.
そこで本発明は上記の欠点を解決することを目
的とし、板状にしたPt−Au合金を積層複合して
一体にした材料によつて製造することを特徴とす
る。 Therefore, the present invention aims to solve the above-mentioned drawbacks and is characterized in that it is manufactured from a material made by laminating and combining plate-shaped Pt-Au alloys into one piece.
以下に本発明に係る坩堝の製造方法の一実施例
を説明すると、まずPt−AuのPt合金インゴツト
を熱間鍛造し、圧延を行なつて薄い材料とする。
次いでこの様にしたPt合金材料を所望枚数重ね合
せて熱間圧着を行なつて希望寸法の形状に絞り加
工して製造するものである。 An embodiment of the method for manufacturing a crucible according to the present invention will be described below. First, a Pt alloy ingot of Pt--Au is hot-forged and rolled into a thin material.
Next, the desired number of Pt alloy materials thus prepared are stacked one on top of the other, hot-pressed, and drawn into a shape with desired dimensions.
尚、Pt−Auは好ましくはPt−１〜10％Auの割
合が良い。 In addition, Pt-Au preferably has a good proportion of Pt-1 to 10% Au.
以上の製造方法による坩堝は、機械的強度が従
来品より増大し、特に高温耐久性は著しく向上す
る。この理由は、材料の鋳造時に吸蔵ガスを放出
しながら固化収縮するが、この冷却過程における
収縮や放出ガスによつて生ず収縮孔，ピンホール
やブローホール等の欠陥がインゴツト内に不規則
に散在し、一般的鍛造法ではこれら内部欠陥を完
全に排除することは不可能と云える。また、これ
ら内部欠陥は発生機構造上局部に集中する傾向が
あるため、そこに応力が加わつたり、腐食性物質
と接触した場合、割れや腐食物に発展する。 The crucible manufactured by the above manufacturing method has greater mechanical strength than conventional products, and particularly has significantly improved high temperature durability. The reason for this is that when the material is cast, it solidifies and shrinks while releasing occluded gas, and defects such as shrinkage holes, pinholes, and blowholes occur irregularly in the ingot due to the shrinkage and released gas during this cooling process. It can be said that it is impossible to completely eliminate these internal defects with general forging methods. Furthermore, because these internal defects tend to concentrate locally due to the structure of the generator, if stress is applied to them or if they come into contact with corrosive substances, they will develop into cracks or corrosive substances.
この製造方法は上述の如くこれら内部欠陥が存
在するインゴツトを薄くし多数枚重ねて複合する
ことによつて各層の集中欠陥を分散せしめ、その
結果として割れや腐食が後続の層によつて喰い止
められることとなる。 As mentioned above, this manufacturing method disperses the concentrated defects in each layer by thinning ingots containing these internal defects and stacking them in multiple layers, thereby preventing cracks and corrosion from occurring in subsequent layers. It will be.
更にこの製造方法による材料を再結晶温度以上
で使用した場合、結晶の成長は各層間で抑制され
る為、全体が微結晶質となり、高温強度が著しく
向上するものである。 Furthermore, when the material produced by this manufacturing method is used at a temperature higher than the recrystallization temperature, crystal growth is suppressed between each layer, so the entire material becomes microcrystalline, and the high-temperature strength is significantly improved.
以上の様な理由によつて本発明による坩堝は耐
久性，機械的強度にすぐれた性質を有するもので
ある。 For the reasons mentioned above, the crucible according to the present invention has excellent properties in terms of durability and mechanical strength.
図面は本発明の製造状態を示す拡大説明図であ
る。
The drawing is an enlarged explanatory view showing the manufacturing state of the present invention.
Claims (1)
冷間加工することにより、Pt−Au合金製の薄板
を形成し、 このPt−Au合金製の薄板を複数枚重ね合わせ
て複合加工することにより多層板を形成し、 この多層板を絞り加工することにより多層構造
の坩堝を製造することを特徴とする坩堝の製造方
法。 ２ インゴツトとして１％〜10％のAuを含有す
るPt−Au合金を使用したことを特徴とする特許
請求の範囲第１項記載の坩堝の製造方法。[Claims] 1 A Pt-Au alloy thin plate is formed by hot or cold working a Pt-Au alloy ingot, and a plurality of Pt-Au alloy thin plates are stacked together. A method for producing a crucible, comprising forming a multilayer plate through composite processing, and producing a multilayer structure crucible by drawing the multilayer plate. 2. The method for manufacturing a crucible according to claim 1, characterized in that a Pt-Au alloy containing 1% to 10% Au is used as an ingot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983880A JPS56117087A (en) | 1980-02-21 | 1980-02-21 | Crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983880A JPS56117087A (en) | 1980-02-21 | 1980-02-21 | Crucible |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56117087A JPS56117087A (en) | 1981-09-14 |
| JPS6123472B2 true JPS6123472B2 (en) | 1986-06-05 |
Family
ID=12010405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983880A Granted JPS56117087A (en) | 1980-02-21 | 1980-02-21 | Crucible |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56117087A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59174589A (en) * | 1983-03-18 | 1984-10-03 | Tanaka Kikinzoku Kogyo Kk | Platinum crucible |
| JPH03221281A (en) * | 1990-08-27 | 1991-09-30 | Osaka Diamond Ind Co Ltd | Welding method for cutter segment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449919A (en) * | 1977-09-29 | 1979-04-19 | Tanaka Precious Metal Ind | Production of strengthened platinum |
-
1980
- 1980-02-21 JP JP1983880A patent/JPS56117087A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449919A (en) * | 1977-09-29 | 1979-04-19 | Tanaka Precious Metal Ind | Production of strengthened platinum |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56117087A (en) | 1981-09-14 |
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