JPH0459977A - Production of cast article coated with corrosion resistant layer - Google Patents
Production of cast article coated with corrosion resistant layerInfo
- Publication number
- JPH0459977A JPH0459977A JP17175590A JP17175590A JPH0459977A JP H0459977 A JPH0459977 A JP H0459977A JP 17175590 A JP17175590 A JP 17175590A JP 17175590 A JP17175590 A JP 17175590A JP H0459977 A JPH0459977 A JP H0459977A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- layer
- resistant
- cast product
- hot isostatic
- 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
- 230000007797 corrosion Effects 0.000 title claims abstract description 71
- 238000005260 corrosion Methods 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims description 53
- 239000002184 metal Substances 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 2
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 17
- 238000010894 electron beam technology Methods 0.000 abstract description 8
- 238000005304 joining Methods 0.000 abstract description 4
- 238000005422 blasting Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 5
- 239000010959 steel Substances 0.000 abstract 5
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000001513 hot isostatic pressing Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐蝕層にて表面が被覆された鋳造品を製造す
る方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing a cast article whose surface is coated with a corrosion-resistant layer.
高い強度を有する鋳造品、例えば遠心力鋳鋼管は、ビル
用柱材等に多く用いられている。前記鋳造品か多く用い
られているのは、前記鋳造品がその機械的性質やコスト
の点て総合的に優れているという理由に加え、その鋳肌
の凹凸具合に企まらざる意匠性か存在するという鋳造品
特有の理由があるからである。そして、前記鋳造品がビ
ル用柱材等に用いられるときには、その表面の耐蝕性が
要求されることが多い。そこで、従来は、前記鋳造品の
表面に耐蝕性確保のだめの塗装が施され、その表面に、
塗装によって生じた耐蝕層を形成することとしていた。Cast products with high strength, such as centrifugal cast steel pipes, are often used as pillar materials for buildings. The reason why the above-mentioned cast products are widely used is not only because they have excellent overall mechanical properties and cost, but also because of the unexpected design of the unevenness of the casting surface. This is because there is a reason why it exists, which is unique to cast products. When the cast product is used as a pillar material for a building, corrosion resistance on the surface is often required. Therefore, in the past, a coating was applied to the surface of the cast product to ensure corrosion resistance, and the surface was coated with a coating to ensure corrosion resistance.
It was decided to form a corrosion-resistant layer caused by painting.
然るに、前記鋳造品の表面に耐蝕性確保のための塗装が
施されている場合、その塗装によって生じた耐蝕層は、
耐蝕性において優れているものの、耐火性や耐久性環に
おいて優れているとはいい難いという問題がある。However, if the surface of the cast product is coated to ensure corrosion resistance, the corrosion-resistant layer created by the coating will be
Although it is excellent in corrosion resistance, it is difficult to say that it is excellent in fire resistance and durability.
本発明は、かかる事情に鑑みてなされたものであり、前
記鋳造品特有の表面の意匠性を損なわず、耐蝕性は勿論
、耐火性や耐久性等も優れた耐蝕層被覆鋳造品を製造す
る方法を提供することを目的としている。The present invention has been made in view of the above circumstances, and it is an object of the present invention to manufacture a corrosion-resistant layer-coated cast product that does not impair the surface design characteristic of the cast product and has excellent not only corrosion resistance but also fire resistance and durability. The purpose is to provide a method.
本発明に係る耐蝕層被覆鋳造品の製造方法の第１の特徴
構成は、
鋳造品の表面に耐蝕性金属板を、前者が後者にて被覆さ
れるように配置する工程と、前記鋳造品と前記耐蝕性金
属板とを、その両者間の隙間を減圧状態となしつつ縁部
接合することにより、前記隙間か減圧下でシールされ且
つ前記両者か一体化されてなる二層金属組合せ体を形成
する工程と、
前記二層金属組合せ体に対して熱間静水圧圧縮処理、所
謂、ＨＩＰ処理を施して前記耐蝕性金属板を前記鋳造品
の表面形状に沿わせる工程とを含む点にある。A first characteristic configuration of the method for manufacturing a corrosion-resistant layer-coated cast product according to the present invention includes the steps of: arranging a corrosion-resistant metal plate on the surface of the cast product so that the former is covered with the latter; By joining the edges of the corrosion-resistant metal plate while reducing the pressure in the gap between the two, a two-layer metal assembly is formed in which the gap is sealed under reduced pressure and the two are integrated. and a step of subjecting the two-layer metal combination to hot isostatic pressing treatment, so-called HIP treatment, to make the corrosion-resistant metal plate conform to the surface shape of the cast product.
また、本発明に係る耐蝕層被覆鋳造品の製造方法の第２
の特徴構成は、前記耐蝕性金属板かステンレス鋼である
二層金属組合せ体に対して、アルゴン雰囲気中にて前記
熱間静水圧圧縮処理を施す点にある。Moreover, the second method for manufacturing a corrosion-resistant layer-coated cast product according to the present invention
The feature of this invention is that the two-layer metal combination, which is either the corrosion-resistant metal plate or stainless steel, is subjected to the hot isostatic compression treatment in an argon atmosphere.
また、本発明に係る耐蝕層被覆鋳造品の製造方法の第３
の特徴構成は、前記耐蝕性金属板がチタンである二層金
属組合せ体に対して、窒素雰囲気中にて熱間静水圧圧縮
処理を施す点にある。Further, the third method of manufacturing a corrosion-resistant layer-coated cast product according to the present invention
is characterized in that the two-layer metal assembly in which the corrosion-resistant metal plate is titanium is subjected to hot isostatic compression treatment in a nitrogen atmosphere.
前記第１の特徴構成を備える本発明方法によれば、前記
二層金属組合せ体が熱間静水圧圧縮処理されて得られる
耐蝕層被覆鋳造品の表面も前記耐蝕性金属板にて被覆さ
れた状態となり、その表面の耐蝕性、耐火性、耐久性が
確保される。そして、前記二層金属組合せ体の熱間静水
圧圧縮処理後の状態では、前記耐蝕性金属板が前記鋳造
品の表面形状に沿って変形し、結果的に得られる前記耐
蝕層被覆鋳造品の表面に、元々の鋳造品の鋳肌の凹凸の
影響を受けた凹凸か形成され、もってその表面にも鋳造
品特有の意匠性が存在する。しかも、前記二層金属組合
せ体の熱間静水圧圧縮処理後の状態では、二層の金属が
固相接合（圧接）された状態となるので、二層の金属が
液相接合（融接）された状態と異なり、二層の金属間に
微視的な空隙が存在して該空隙が二層の金属間を絶縁し
、その部分での電蝕の発生が抑えられる。なお、前記二
層金属組合せ体を形成するのに、前記鋳造品と前記耐蝕
性金属板とを、その両者間の隙間を減圧状態となしつつ
縁部接合して一体化するのは、そのようにして得られた
二層金属組合せ体の中間の隙間が減圧下でシールされた
状態となっているので、該隙間に熱間静水圧圧縮処理時
に問題となる不純ガスか介在するのが抑えられ、熱間静
水圧圧縮処理が円滑に行われるからである。According to the method of the present invention having the first characteristic configuration, the surface of the corrosion-resistant layer-coated cast product obtained by subjecting the two-layer metal combination to hot isostatic compression treatment is also covered with the corrosion-resistant metal plate. The corrosion resistance, fire resistance, and durability of the surface are ensured. Then, in the state after the hot isostatic compression treatment of the two-layer metal combination, the corrosion-resistant metal plate deforms along the surface shape of the cast product, resulting in the corrosion-resistant layer-covered cast product being obtained. The surface is affected by the unevenness of the casting surface of the original cast product, and as a result, the surface also has a design characteristic unique to the cast product. Moreover, in the state after the hot isostatic compression treatment of the two-layer metal combination, the two metal layers are solid phase welded (pressure welded), so the two metal layers are liquid phase welded (fusion welded). Unlike the state in which the two metal layers are exposed, there is a microscopic gap between the two metal layers, and the gap insulates the two metal layers, suppressing the occurrence of electrolytic corrosion in that area. In addition, in order to form the two-layer metal assembly, the casting product and the corrosion-resistant metal plate are integrated by joining their edges while keeping the gap between them in a reduced pressure state. Since the gap in the middle of the two-layer metal assembly obtained by the process is sealed under reduced pressure, the presence of impurity gases, which can be a problem during hot isostatic pressing, is prevented from entering the gap. This is because the hot isostatic compression treatment is performed smoothly.
また、前記第２の特徴構成を備える本発明方法によれば
、前記熱間静水圧圧縮処理の過程にて、雰囲気中の微量
の酸素と前記耐蝕性金属板中のクロムとが反応し、耐蝕
層被覆鋳造品の表面に酸化クロムが形成され、該表面は
濃緑色を呈するようになる。Further, according to the method of the present invention having the second characteristic configuration, in the process of the hot isostatic pressing treatment, a trace amount of oxygen in the atmosphere reacts with the chromium in the corrosion-resistant metal plate, resulting in corrosion-resistant metal plate. Chromium oxide is formed on the surface of the coated casting, giving the surface a dark green color.
また、前記第３の特徴構成を備える本発明方法によれば
、前記熱間静水圧圧縮処理の過程にて、雰囲気中の窒素
と前記耐蝕性金属板中のチタンとが反応し、耐蝕層被覆
鋳造品の表面に窒化チタンが形成され、該表面は金色を
呈するようになる。Further, according to the method of the present invention having the third feature, nitrogen in the atmosphere reacts with titanium in the corrosion-resistant metal plate during the hot isostatic pressing process, and the corrosion-resistant layer coats the corrosion-resistant metal plate. Titanium nitride is formed on the surface of the casting, and the surface takes on a golden color.
前記第１の特徴構成を備える本発明方法を用いて耐蝕層
被覆鋳造品を製造する場合、得られる耐蝕層被覆鋳造品
の表面には、鋳造品特有の鋳肌凹凸に起因する意匠性が
存在する。そしてその表面には、耐火性や耐久性に優れ
、しかも電蝕の起こらない耐蝕層か形成されるため、前
記耐蝕層被覆鋳造品は、耐蝕性は勿論、耐火性や耐久性
等も優れたものとなる。When manufacturing a corrosion-resistant layer-coated cast product using the method of the present invention having the first feature, the surface of the resulting corrosion-resistant layer-coated cast product has a design due to the unevenness of the casting surface unique to the cast product. do. A corrosion-resistant layer is formed on the surface, which has excellent fire resistance and durability, and does not cause electrolytic corrosion. Therefore, the corrosion-resistant layer-coated cast product has excellent fire resistance and durability as well as corrosion resistance. Become something.
このように、本発明方法によれば、鋳造品特有の表面の
意匠性を損なわず、耐蝕性は勿論、耐火性や耐久性等も
優れた耐蝕層被覆鋳造品か得られるようになる。As described above, according to the method of the present invention, a cast product coated with a corrosion-resistant layer can be obtained which does not impair the surface design characteristic of a cast product and has excellent not only corrosion resistance but also fire resistance and durability.
また、前記第２の特徴構成を備える本発明方法を用いて
耐蝕層被覆鋳造品を製造する場合、得られる耐蝕層被覆
鋳造品の表面は、上述したように濃緑色を呈するように
なるため、その色合によって外観性が向上する。In addition, when manufacturing a corrosion-resistant layer-coated cast product using the method of the present invention having the second feature, the surface of the resulting corrosion-resistant layer-coated cast product exhibits a dark green color as described above. The appearance improves depending on the color.
また、前記第３の特徴構成を備える本発明方法を用いて
耐蝕層被覆鋳造品を製造する場合、得られる耐蝕層被覆
鋳造品の表面は、上述したように金色を呈するようにな
るため、その色合によって外観性か向上する。In addition, when manufacturing a corrosion-resistant layer-coated cast product using the method of the present invention having the third characteristic configuration, the surface of the resulting corrosion-resistant layer-coated cast product takes on a golden color as described above. Appearance improves depending on the color.
以下、本発明に係る耐蝕層被覆鋳造品の製造方法を図面
に基ついて説明する。EMBODIMENT OF THE INVENTION Hereinafter, the manufacturing method of the corrosion-resistant layer coated cast article based on this invention is demonstrated based on drawing.
第１図は（Ａ）、 （Ｂ）、 （Ｃ）、 （Ｄ）、 （
Ｅ）、 （Ｆ）本発明方法の一実施例を工程を追って示
す模式的説明図である。Figure 1 shows (A), (B), (C), (D), (
E), (F) are schematic explanatory diagrams showing step by step an embodiment of the method of the present invention.
第１図（Ａ）に示すように、鋳造品としての遠心力鋳鋼
管（１）と、該遠心力鋳鋼管（１）の外周面を被覆すべ
き耐蝕性金属板としてのステンレス鋼板（２）とを先ず
準備する。該遠心力鋳鋼管（１）にはショツトブラスト
処理を施し、該遠心力鋳鋼管（１）の表面からスケール
を除去してお（。As shown in Fig. 1(A), a centrifugally cast steel pipe (1) as a casting product and a stainless steel plate (2) as a corrosion-resistant metal plate to cover the outer peripheral surface of the centrifugally cast steel pipe (1). First, prepare. The centrifugally cast steel pipe (1) is subjected to shot blasting to remove scale from the surface of the centrifugally cast steel pipe (1).
次に、前記ステンレス鋼板（２）を曲げ加工してこれを
前記遠心力鋳鋼管（１）の周りに巻き付け、更にその巻
き付は状態で前記ステンレス鋼板（２）の突き合わせ端
面をＴＩＧ溶接（タングステンイナートガスアーク溶接
）し、もって遠心力鋳鋼管（１）か第１図（Ｂ）及び第
１図（Ｃ）（両図は同一工程を示す）に示すようにステ
ンレス鋼板（２）にて外周被覆されるように配置されて
なる二層金属組合せ体（３）の素材（４）を得る。Next, the stainless steel plate (2) is bent and wound around the centrifugally cast steel pipe (1), and the butt end surfaces of the stainless steel plate (2) are TIG welded (tungsten (inert gas arc welding), and then the centrifugal cast steel pipe (1) is coated with a stainless steel plate (2) as shown in Figure 1 (B) and Figure 1 (C) (both figures show the same process). A raw material (4) of a two-layer metal combination (3) is obtained, which is arranged in such a manner as to be.
次に、前記二層金属組合せ体（３）の素材（４）を電子
ビーム溶接機の真空チャンバー内に装入し、真空中にて
前記素材（４）の両縁部（４ａ）を、溶は込み深さが前
記遠心力鋳鋼管（１）にまで及ぶような条件で円周電子
ビーム溶接する。その結果、前記遠心力鋳鋼管（１）と
前記ステンレス鋼板（２）との間の隙間が減圧下でシー
ルされ且つその両者（１）、 （２）が第１図（Ｄ）に
示すように電子ビーム溶接部（３ａ）を介して一体化さ
れてなる二層金属組合せ体（３）が得られる。Next, the material (4) of the two-layer metal combination (3) is charged into a vacuum chamber of an electron beam welding machine, and both edges (4a) of the material (4) are melted in a vacuum. Circumferential electron beam welding is performed under conditions such that the penetration depth extends to the centrifugally cast steel pipe (1). As a result, the gap between the centrifugal cast steel pipe (1) and the stainless steel plate (2) is sealed under reduced pressure, and both (1) and (2) are as shown in FIG. 1(D). A two-layer metal assembly (3) is obtained which is integrated via an electron beam weld (3a).
次に、前記二層金属組合せ体（３）に対して、熱間静水
圧圧縮処理装置を用いて熱間静水圧圧縮処理を施す。具
体的には、前記二層金属組合せ体（３）に対して、処理
温度：１２００°Ｃ１処理圧力ニ１０００ｋｇ／ａｌ、
雰囲気ガス：アルゴンガス、処理時間： ２ ｈｒの条
件で熱間静水圧圧縮処理を施す。その結果、第１図（Ｅ
）に示すように、前記二層金属組合せ体（３）が圧縮さ
れ、且つ、前記ステンレス鋼板（２）か前記遠心力鋳鋼
管（１）の表面形状に沿った熱間静水圧圧縮処理品（５
）か得られる。なお、前記熱間静水圧圧縮処理の処理温
度は上述の例では１２００°Ｃであったが、これか９３
０°Ｃである場合でも有効に前記熱間静水圧圧縮処理品
（５）か得られる。そして、前記遠心力鋳鋼管（１）が
炭素鋼である場合、鋳鋼冷却後の鋳鋼管（１）を９３０
°Ｃまで昇温しで所定時間保持した後に空冷するという
熱処理を行い、所定の強度を得るようにしているが、こ
の熱処理は、前記熱間静水圧圧縮処理を９３０°Ｃで処
理することによって兼用処理され、その省略が可能とな
る。Next, the two-layer metal combination (3) is subjected to a hot isostatic compression treatment using a hot isostatic compression treatment apparatus. Specifically, the two-layer metal combination (3) was treated at a treatment temperature of 1200° C., a treatment pressure of 1000 kg/al,
Hot isostatic compression treatment is performed under the conditions of atmospheric gas: argon gas and treatment time: 2 hr. As a result, Figure 1 (E
), the two-layer metal combination (3) is compressed, and a hot isostatic pressing product ( 5
) can be obtained. In addition, the treatment temperature of the hot isostatic compression treatment was 1200°C in the above example, but this temperature was 93°C.
Even when the temperature is 0°C, the hot isostatic pressing product (5) can be effectively obtained. When the centrifugally cast steel pipe (1) is carbon steel, the cast steel pipe (1) after cooling the cast steel is
A heat treatment is performed in which the temperature is raised to °C, held for a predetermined time, and then air cooled to obtain a predetermined strength. It is also processed and can be omitted.
次に、前記熱間静水圧圧縮処理品（５）における前記電
子ビーム溶接部（３ａ）の存在部分を切断除去し、第１
図（Ｆ）に示すような耐蝕層被覆鋳造品（６）を得る。Next, the portion of the hot isostatically compressed product (5) where the electron beam welded portion (3a) is present is cut and removed, and the first
A corrosion-resistant layer-coated cast product (6) as shown in Figure (F) is obtained.
かくして得られる耐蝕層被覆鋳造品（６）は、その表面
が前記ステンレス鋼板（２）にて被覆された状態となり
、その表面の耐蝕性、耐火性、耐久性か確保される。そ
して、前記耐蝕層被覆鋳造品（６）のうちの前記ステン
レス鋼板（２）の部分が前記遠心力鋳鋼管（１）の部分
の表面形状に沿って変形し、その表面には元々の遠心力
鋳鋼管（］）の鋳肌の凹凸の影響を受けた凹凸が形成さ
れ、もってその表面にも鋳造品特有の意匠性が存在する
。しかも、前記熱間静水圧圧縮処理後の二層金属組合せ
体（３）においては、前記遠心力鋳鋼管（１）と前記ス
テンレス鋼板（２）とが固相接合（圧接）された状態と
なり、その部分での電蝕の発生が抑えられる。また、本
実施例においては、前記熱間静水圧圧縮処理の過程にて
、雰囲気中の微量の酸素と前記ステンレス鋼板（２）中
のクロムとが反応し、耐蝕層被覆鋳造品の表面に酸化ク
ロムが形成され、該表面は濃緑色を呈するようになる。The surface of the corrosion-resistant layer-coated cast product (6) thus obtained is coated with the stainless steel plate (2), and the corrosion resistance, fire resistance, and durability of the surface are ensured. Then, the stainless steel plate (2) portion of the corrosion-resistant layer coated cast product (6) is deformed along the surface shape of the centrifugally cast steel pipe (1), and the surface is affected by the original centrifugal force. The irregularities are formed due to the influence of the irregularities of the casting surface of the cast steel pipe (), and the surface also has a design characteristic unique to cast products. Moreover, in the two-layer metal assembly (3) after the hot isostatic compression treatment, the centrifugal cast steel pipe (1) and the stainless steel plate (2) are in a solid state welded state (pressure welded), The occurrence of electrolytic corrosion in that area is suppressed. In addition, in this example, during the hot isostatic pressing process, a trace amount of oxygen in the atmosphere reacts with the chromium in the stainless steel plate (2), causing oxidation to occur on the surface of the corrosion-resistant layer-coated cast product. Chromium is formed and the surface takes on a dark green color.
前記遠心力鋳鋼管（１）のまわりに耐蝕性金属板（２）
としてチタンを被覆してなる二層金属組合せ体（３）に
対して、窒素雰囲気中にて熱間静水圧圧縮処理を施す方
法も考えられる。A corrosion-resistant metal plate (2) is placed around the centrifugal cast steel pipe (1).
Another possible method is to subject the two-layer metal assembly (3) coated with titanium to a hot isostatic compression treatment in a nitrogen atmosphere.
かかる方法においては、前記熱間静水圧圧縮処理の過程
にて、雰囲気中の窒素と前記耐蝕性金属板（２）中のチ
タンとが反応し、得られる耐蝕層被覆鋳造品の表面に窒
化チタンが形成されてその表面は金色を呈するようにな
り、その外観性か向上する。In this method, during the hot isostatic pressing process, nitrogen in the atmosphere reacts with titanium in the corrosion-resistant metal plate (2), and titanium nitride is formed on the surface of the resulting corrosion-resistant layer-coated cast product. is formed, and its surface takes on a golden color, improving its appearance.
また、第２図（Ａ）、 （Ｂ）、 （Ｃ）、 （Ｄ）に
示すように、平板状の鋳造品（１）の−表面に対して、
該鋳造品（１）と平面形状が同一形状の耐蝕性金属板（
２）を被覆する実施例も考えられる。この場合において
も、上述した工程と同様の工程を経て前記耐蝕層被覆鋳
造品（６）が製造される。但し、前記二層金属組合せ体
（３）における鋳造品（１）と前記耐蝕性金属板（２）
との電子ビーム溶接による縁部接合（３ａ）は、第２図
（Ｃ）に示すように、前記二層金属組合せ体（３）の周
縁部を一周するように且つ溶は込みが厚み方向に得られ
るように行われる。In addition, as shown in Fig. 2 (A), (B), (C), and (D), for the − surface of the flat plate-shaped cast product (1),
A corrosion-resistant metal plate having the same planar shape as the cast product (1) (
An embodiment in which 2) is covered is also conceivable. In this case as well, the corrosion-resistant layer-coated cast product (6) is manufactured through the same steps as those described above. However, the cast product (1) and the corrosion-resistant metal plate (2) in the two-layer metal combination body (3)
The edge joining (3a) by electron beam welding with It is done as it is obtained.
また、前記鋳造品（１）と前記耐蝕性金属板（２）とを
、その両者（１）、 （２）間の隙間を減圧状態となし
つつ縁部接合するのに、上述の各実施例では電子ビーム
溶接を採用することとしたか、前記両者（１）、 （２
）間の隙間を減圧状態となしつつ縁部接合できれば、必
ずしも電子ビーム溶接を採用する必要はない。Further, in order to join the cast product (1) and the corrosion-resistant metal plate (2) at their edges while keeping the gap between them (1) and (2) in a reduced pressure state, each of the above-mentioned embodiments may be used. So, did you decide to adopt electron beam welding? Both (1) and (2)
) If the edges can be joined while reducing the pressure in the gap between the parts, it is not necessarily necessary to use electron beam welding.
なお、特許請求の範囲の項に図面との対照を便利にする
ために符号を記すが、この記入によって本発明方法は添
付図面によって示される方法に限定されるものではない
。Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the method of the present invention is not limited to the method shown by the accompanying drawings.
第１図（Ａ）、 （Ｂ）、 （Ｃ）、 （Ｄ）、 （Ｅ
）、 （Ｆ）は本発明方法の一実施例を工程を追って示
す模式的説明図、第２図（Ａ）、 （Ｂ）、 （Ｃ）、
（Ｄ）は本発明方法の別実施例を工程を追って示す模
式的説明図である。
（１）・・・・・・鋳造品、（２）・・・・・・耐蝕性
金属板、（３）・・・二層金属組合せ体。Figure 1 (A), (B), (C), (D), (E
), (F) is a schematic explanatory diagram showing step by step an embodiment of the method of the present invention, FIGS. 2(A), (B), (C),
(D) is a schematic explanatory diagram showing step by step another embodiment of the method of the present invention. (1)...Cast product, (2)...Corrosion-resistant metal plate, (3)...Two-layer metal combination.
Claims (3)
（１）が後者（２）にて被覆されるように配置する工程
と、 前記鋳造品（１）と前記耐蝕性金属板（２）とを、その
両者（１），（２）間の隙間を減圧状態となしつつ縁部
接合することにより、前記隙間が減圧下でシールされ且
つ前記両者（１），（２）が一体化されてなる二層金属
組合せ体（３）を形成する工程と、 前記二層金属組合せ体（３）に対して熱間静水圧圧縮処
理を施して前記耐蝕性金属板（２）を前記鋳造品（１）
の表面形状に沿わせる工程とを含む耐蝕層被覆鋳造品の
製造方法。1. a step of arranging a corrosion-resistant metal plate (2) on the surface of the cast product (1) so that the former (1) is covered with the latter (2), and the cast product (1) and the corrosion-resistant metal plate (2) are joined at their edges while reducing the pressure in the gap between them (1) and (2), so that the gap is sealed under reduced pressure and both (1) and (2) are forming an integrated two-layer metal combination body (3); and performing a hot isostatic compression treatment on the two-layer metal combination body (3) to form the corrosion-resistant metal plate (2) into the two-layer metal combination body (3). Casting product (1)
A method for manufacturing a corrosion-resistant layer-coated cast product, comprising a step of conforming to the surface shape of the corrosion-resistant layer.
金属組合せ体（３）に対して、アルゴン雰囲気中にて熱
間静水圧圧縮処理を施す請求項１記載の耐蝕層被覆鋳造
品の製造方法。2. 2. The production of a corrosion-resistant layer-coated cast product according to claim 1, wherein the two-layer metal combination (3) in which the corrosion-resistant metal plate (2) is stainless steel is subjected to hot isostatic compression treatment in an argon atmosphere. Method.
合せ体（３）に対して、窒素雰囲気中にて熱間静水圧圧
縮処理を施す請求項１記載の耐蝕層被覆鋳造品の製造方
法。3. The method for manufacturing a corrosion-resistant layer-coated cast product according to claim 1, wherein the two-layer metal combination (3) in which the corrosion-resistant metal plate (2) is made of titanium is subjected to hot isostatic compression treatment in a nitrogen atmosphere. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17175590A JPH0459977A (en) | 1990-06-28 | 1990-06-28 | Production of cast article coated with corrosion resistant layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17175590A JPH0459977A (en) | 1990-06-28 | 1990-06-28 | Production of cast article coated with corrosion resistant layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0459977A true JPH0459977A (en) | 1992-02-26 |
Family
ID=15929086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17175590A Pending JPH0459977A (en) | 1990-06-28 | 1990-06-28 | Production of cast article coated with corrosion resistant layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0459977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211912A (en) * | 2021-05-19 | 2021-08-06 | 济南海泰新材料有限公司 | Alkali-resistant coating cloth |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145385A (en) * | 1982-02-24 | 1983-08-30 | Mitsubishi Heavy Ind Ltd | Manufacture of anti-corrosion casting |
| JPS5977113A (en) * | 1982-10-25 | 1984-05-02 | 株式会社黒木工業所 | Bolt and its manufacture |
| JPS59137187A (en) * | 1983-01-28 | 1984-08-07 | Kuroki Kogyosho:Kk | Spring and its production |
-
1990
- 1990-06-28 JP JP17175590A patent/JPH0459977A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145385A (en) * | 1982-02-24 | 1983-08-30 | Mitsubishi Heavy Ind Ltd | Manufacture of anti-corrosion casting |
| JPS5977113A (en) * | 1982-10-25 | 1984-05-02 | 株式会社黒木工業所 | Bolt and its manufacture |
| JPS59137187A (en) * | 1983-01-28 | 1984-08-07 | Kuroki Kogyosho:Kk | Spring and its production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211912A (en) * | 2021-05-19 | 2021-08-06 | 济南海泰新材料有限公司 | Alkali-resistant coating cloth |
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