JPH0261524B2 - - Google Patents
Info
- Publication number
- JPH0261524B2 JPH0261524B2 JP59241949A JP24194984A JPH0261524B2 JP H0261524 B2 JPH0261524 B2 JP H0261524B2 JP 59241949 A JP59241949 A JP 59241949A JP 24194984 A JP24194984 A JP 24194984A JP H0261524 B2 JPH0261524 B2 JP H0261524B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- base metal
- melting
- metal surface
- locally
- 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 - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 36
- 239000010953 base metal Substances 0.000 claims description 31
- 238000002844 melting Methods 0.000 claims description 29
- 230000008018 melting Effects 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 238000010894 electron beam technology Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000010128 melt processing Methods 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000003825 pressing Methods 0.000 description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000012733 comparative method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 210000002381 plasma Anatomy 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002904 solvent 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
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Description
（産業上の利用分野）
本発明は金属表層を局部的に溶融することおよ
び成形するによつてその表層を改質する技術に関
するものである。
（従来の技術）
従来技術のうちいわゆる金属の熱処理は溶融点
を超えて加熱することはなく、成分偏析の改善や
結晶組織の微細化には自ら限界があり、新たな成
分の添加は表面から拡散できるわずかな量と深さ
に限定されていた。また、異種金属を表層に付着
させるメツキや溶射は母材との付着力が弱く、使
用性能向上には限界があつた。さらに、最近レー
ザビームにより金属表層を溶融する試みが知られ
ているが、この方法はブローホールや亀裂を生じ
また表面に著るしいおうとつを生じ実用化される
に至つていない。
（発明が解決しようとする問題点）
本発明は金属の表層を溶融し、その凝固組織を
改質すること、および異種金属を添加し合金化す
ること、さらにこれらの方法においてブローホー
ルや亀裂を生じさせず表面を平滑で緻密な組織と
する加工法を提供することを目的とする。
（問題点を解決するための手段）
本発明はつぎのように構成される。
(1) 母材金属の表面に、該母材金属よりも酸化さ
れ易い物質と前記母材よりも融点の低い金属に
よつて構成される添加剤を存在させて、前記母
材金属表面を不活性ガスによる保護下に局部的
に急速加熱して溶融せしめ、該溶融部を凝固完
了前に押圧ローラによつて押圧成形するととも
に急冷することを特徴とする金属表面溶融加工
法。
(2) 母材金属表面を局部的に急速加熱する手段
が、レーザビーム或は電子ビームを適用するも
のである前記(1)項記載の金属表面溶融加工法。
(3) 母材金属の表面に、該母材金属よりも酸化さ
れ易い物質と前記母材よりも融点の低い金属に
よつて構成される添加剤を合金成分とともに存
在させて、前記母材金属表面を不活性ガスによ
る保護下に局部的に急速加熱して溶融せしめ、
該溶融部を凝固完了前に押圧ローラによつて押
圧成形するとともに急冷することを特徴とする
金属表面溶融加工法。
(4) 母材金属表面を局部的に急速加熱する手段
が、レーザビーム或は電子ビームを適用するも
のである前記(3)項記載の金属表面の溶融加工
法。
次に本発明を詳細に説明する。
母材金属の表層を局部的に急速加熱して溶解す
ると凝固組織は細かくなり、偏析も小さくなり、
耐熱亀裂性や耐摩耗性が向上する。しかしなが
ら、凝固過程でブローホールや内部割れが発生し
やすく、表面はおうとつを生じやすい。これらの
欠点は、表層溶解直後に該部を押圧成形すること
によつて、凝固過程で生ずる引張応力を圧縮応力
に変化せしめて防止することができる。特に押圧
成形が凝固完了前に始まつた時はその効果が大き
い。急速加熱溶解部をただちに押圧成形すること
によつて、該溶解部を押圧工具によつて急速冷却
し、凝固組織を一層小さくすること、また押圧工
具によつて成形し、平滑にすること、さらには加
工を加えることによつて凝固組織の再結晶を促進
させることができる。
多くの金属は溶融によつて酸化反応が急速に進
行し、ガスを発生し、ブローホールをつくりやす
い。本発明において母材金属より酸化されやすい
物質を含むいわゆる脱酸剤を共存せしめることに
よつて溶融金属の酸化反応およびリミングアクシ
ヨを鎮静せしめ、この時生ずる脱酸生成物を浮上
せしめて溶融金属から分離せしめることが望まし
い。母材金属が鋼または鋼合金の場合には脱酸物
質としては周知のアルミ、けい素、マンガン、チ
タン、ジルコニウム、バナジウムまたはその合金
の一種以上を含むものか適当である。これらの脱
酸物質を添加する方法としては、該脱酸物質を含
む添加剤を粉末とし樹脂と溶剤によつて母材金属
に塗布し乾燥したのち母材とともに溶融するか、
該脱酸物質を線状とし線材供給装置によつて母材
溶融部に連続的に供給するか、または脱酸物質を
薄板状とし母材表面を覆い母材とともに溶融する
のがよい。このようにして溶融金属中でのガスの
発生を防止し、脱酸生成物を密度の差によつて分
離浮上させるかまたは微小に分散して無害な状態
とする。合金成分を添加しようとする場合には添
加剤に脱酸剤とともに合金元素を混合し、同様に
して母材とともに溶融せしめるか、このほか添加
剤を溶融または半溶融の状態で母材金属の表面に
付着せしめ、該付着金属の凝固後あるいは凝固を
待たずに母材とともに溶融することもできる。以
上の脱酸剤および合金元素の添加に際し、添加剤
に母材金属より融点の低い金属を加えておくと脱
酸剤および合金元素の飛散を防止することができ
る。
本発明の熱源には母材金属および添加元素を溶
融できる熱源、例えば燃焼ガス、誘導加熱、電
弧、プラズマ、電子ビーム、あるいはレーザビー
ムなどを用いることができるが、エネルギ密度の
高い熱源、例えば電子ビームあるいはレーザビー
ムが局部加熱溶解と急速冷却効果による結晶微細
化が著るしいので材質特性向上の点から最も好ま
しい。また本発明法においては溶融金属の空気酸
化および空気巻込みをさけるために溶融部をアル
ゴン、ヘリウムなどの不活性気体あるいは窒素な
どの反応しにくい気体によつておおうことが好ま
しい。
本発明の押圧成形する方法を説明すると、第１
図に示すように、円柱状被加工物１の円柱面を加
工する場合には、該円柱状被加工物１を矢印２の
方向に回転せしめながらレーザビーム３を照射
し、その表層部４を局部的に急速加熱して溶融部
５を形成せしめ、その進行方向に押圧ローラ６を
配設して該溶融部５を押圧成形する。押圧力と押
圧量はシリンダ７によつて調節する。
（実施例）
表に実施例を従来法と比較して示す。
第１図に示すような装置を用い、直径200mmの
円柱状被加工物の表面にレーザビームを直径４mm
に絞つて照射し、表層を溶融し、進行方向に30mm
離れた位置に待機した直径50mm、幅10mmの押圧ロ
ーラーに２Kgの力を加えて該部を成形した。母材
金属は炭素0.31％、けい素0.41％、マンガン0.60
％、クロム2.88％、ニツケル1.17％の低合金鋼の
鋳造品である。従来法では脱酸剤と母材より低融
点の金属を含まない場合であつて、モリブデンの
粉末をシリコン樹脂をビヒクルとし、シンナーに
より粘度調整、刷毛で塗膜厚さ0.7mmに塗布した
のち、該塗膜面に10kWのレーザビームを相対速
度40mm／秒で照射し、ビーム幅の２分の１が重な
るように隣接部を溶融しつづけたものである。比
較法では脱酸剤としてチタンを用いたほかは従来
法に同じである。比較法によつてブローホールが
改善されている。比較法は公知ではないが、熱亀
裂が発生しているためこのままでは技術としては
未完成である。本発明法ではすべて溶解部をロー
ラーによつて押圧成形し凝固せしめている。本発
明法１では脱酸剤としてチタンを、母材より低融
点の金属としてアルミを用いており、その他の条
件は従来法と同じである。本発明法２ではアルミ
が脱酸剤と母材より低融点の金属を兼ねている場
合で、その他の条件は従来法と同じである。本発
明法３では脱酸剤としてけい素、母材より低融点
の金属にすずを用いた場合である。これらの本発
明法においてはブローホールと熱亀裂は皆無又
は、実用的に無害な程度に小さく、すなわち0.5
mm以下であり良好といえる。また表層の溶融され
た部分のデンドライト間隔はいずれも約5μであ
り母材の50〜100μに比して著るしく微細化され
良好といえる。脱酸剤の効果は脱酸反応として良
く知られているとうりであり、鋼中のブローホー
ル発生を防止する。低融点金属の効果は温度上昇
にともなつて樹脂による塗膜密着性が劣るので、
これに代る高温での塗膜密着剤となること、およ
び高密度エネルギの熱シヨツクをやわらげること
さらには母材と添加合金の酸化を防止することで
ある。添加剤には低融点金属の広がりを良くする
物質を加えることができる。
（実施例）
(Industrial Application Field) The present invention relates to a technique for modifying a metal surface layer by locally melting and molding the surface layer. (Conventional technology) Among the conventional techniques, so-called heat treatment of metals does not involve heating beyond the melting point, and there are limits to improving component segregation and refining the crystal structure, and adding new components is only possible from the surface. It was limited to a small amount and depth that could be spread. Furthermore, plating and thermal spraying, which attach dissimilar metals to the surface layer, have weak adhesion to the base material, which limits the ability to improve performance. Furthermore, attempts have recently been made to melt the metal surface layer with a laser beam, but this method causes blowholes and cracks, as well as significant cavities on the surface, so it has not been put into practical use. (Problems to be Solved by the Invention) The present invention involves melting the surface layer of metal, modifying its solidified structure, adding different metals to form an alloy, and further eliminating blowholes and cracks in these methods. The purpose of the present invention is to provide a processing method that provides a smooth and dense structure on the surface without causing the formation of oxidation. (Means for solving the problems) The present invention is configured as follows. (1) An additive composed of a substance that is more easily oxidized than the base metal and a metal whose melting point is lower than that of the base metal is present on the surface of the base metal to make the surface of the base metal impure. 1. A method for melting a metal surface, which comprises rapidly heating and melting the melted portion locally under the protection of an active gas, and pressing the melted portion with a pressure roller and rapidly cooling the melted portion before solidification is completed. (2) The metal surface melting processing method according to item (1) above, wherein the means for locally rapidly heating the base metal surface applies a laser beam or an electron beam. (3) An additive composed of a substance that is more easily oxidized than the base metal and a metal with a melting point lower than that of the base metal is present on the surface of the base metal together with an alloy component, and the base metal is The surface is rapidly heated locally under the protection of an inert gas to melt it.
A metal surface melt processing method characterized in that the molten portion is press-formed by a pressure roller and rapidly cooled before completion of solidification. (4) The method for melting a metal surface according to item (3) above, wherein the means for locally rapidly heating the base metal surface applies a laser beam or an electron beam. Next, the present invention will be explained in detail. When the surface layer of the base metal is heated locally and melted, the solidified structure becomes finer and segregation becomes smaller.
Improves heat cracking resistance and wear resistance. However, blowholes and internal cracks are likely to occur during the solidification process, and the surface is prone to pitting. These drawbacks can be prevented by press-molding the part immediately after the surface layer is melted, thereby converting the tensile stress generated during the solidification process into compressive stress. This effect is particularly great when pressure forming begins before solidification is complete. Immediately pressing and molding the rapidly heated melted part, the melted part is rapidly cooled by a pressing tool to further reduce the solidified structure; can promote recrystallization of the solidified structure by processing. Many metals undergo rapid oxidation reactions when melted, generating gas and easily creating blowholes. In the present invention, by coexisting a so-called deoxidizing agent containing a substance that is more easily oxidized than the base metal, the oxidation reaction and rimming action of the molten metal are suppressed, and the deoxidized products generated at this time are floated and separated from the molten metal. It is desirable to force them to do so. When the base metal is steel or a steel alloy, suitable deoxidizing substances include one or more of the well-known aluminum, silicon, manganese, titanium, zirconium, vanadium, or alloys thereof. These deoxidizing substances can be added by powdering the additive containing the deoxidizing substance, applying it to the base metal using a resin and a solvent, drying it, and then melting it together with the base metal;
It is preferable that the deoxidizing substance is in the form of a wire and continuously supplied to the melting part of the base material by a wire feeding device, or that the deoxidizing substance is in the form of a thin plate and that it covers the surface of the base material and melts together with the base material. In this way, the generation of gas in the molten metal is prevented, and the deoxidized products are separated and floated due to the density difference, or are finely dispersed and rendered harmless. When adding alloying components, the alloying element is mixed with the additive along with a deoxidizing agent, and the alloying element is melted together with the base metal in the same way, or the additive is melted or semi-molten and applied to the surface of the base metal. It is also possible to deposit the deposited metal on the base metal and melt it together with the base material after or without waiting for the solidification of the deposited metal. When adding the above deoxidizing agent and alloying element, if a metal having a melting point lower than that of the base metal is added to the additive, scattering of the deoxidizing agent and alloying element can be prevented. The heat source of the present invention can be a heat source capable of melting the base metal and additive elements, such as combustion gas, induction heating, electric arc, plasma, electron beam, or laser beam, but heat sources with high energy density, such as electron A beam or a laser beam is most preferable from the viewpoint of improving material properties, since local heating melts and crystal refinement is remarkable due to rapid cooling effects. Further, in the method of the present invention, it is preferable that the melting zone be filled with an inert gas such as argon or helium or a gas that is difficult to react with, such as nitrogen, in order to avoid air oxidation of the molten metal and air entrainment. To explain the press molding method of the present invention, the first
As shown in the figure, when processing the cylindrical surface of a cylindrical workpiece 1, a laser beam 3 is irradiated while the cylindrical workpiece 1 is rotated in the direction of an arrow 2, and its surface layer 4 is A molten portion 5 is formed by rapid local heating, and a pressure roller 6 is disposed in the direction of movement of the molten portion 5 to press-form the molten portion 5. The pressing force and amount are adjusted by the cylinder 7. (Example) Examples are shown in the table in comparison with the conventional method. Using the device shown in Figure 1, a laser beam of 4 mm in diameter is applied to the surface of a cylindrical workpiece with a diameter of 200 mm.
The surface layer is melted by irradiation, and the surface layer is irradiated 30mm in the direction of travel.
The part was molded by applying a force of 2 kg to a pressing roller with a diameter of 50 mm and a width of 10 mm that was waiting at a separate position. Base metal is carbon 0.31%, silicon 0.41%, manganese 0.60
%, 2.88% chromium, and 1.17% nickel. In the conventional method, which does not contain a deoxidizing agent and a metal with a lower melting point than the base material, molybdenum powder is used as a vehicle in silicone resin, the viscosity is adjusted with thinner, and the coating is applied with a brush to a thickness of 0.7 mm. The coating surface was irradiated with a 10 kW laser beam at a relative speed of 40 mm/sec, and adjacent parts were continuously melted so that one-half of the beam width overlapped. The comparative method is the same as the conventional method except that titanium is used as a deoxidizing agent. Blowholes have been improved by comparative methods. Although the comparative method is not publicly known, it is an incomplete technology as it is because thermal cracks occur. In the method of the present invention, the melted portion is all pressed and solidified using rollers. In Method 1 of the present invention, titanium is used as a deoxidizing agent and aluminum is used as a metal with a lower melting point than the base material, and other conditions are the same as in the conventional method. In Method 2 of the present invention, aluminum serves both as a deoxidizing agent and as a metal having a lower melting point than the base material, and other conditions are the same as in the conventional method. In Method 3 of the present invention, silicon is used as a deoxidizing agent and tin is used as a metal having a lower melting point than the base material. In these methods of the present invention, there are no blowholes and thermal cracks, or they are so small that they are practically harmless, that is, 0.5
It can be said to be good as it is less than mm. Furthermore, the dendrite spacing in the molten portion of the surface layer is approximately 5μ, which is significantly finer than the 50 to 100μ of the base material, and can be said to be good. The effect of the deoxidizing agent is well known as a deoxidizing reaction, which prevents the occurrence of blowholes in steel. The effect of low melting point metals is that as the temperature rises, the adhesion of the resin coating deteriorates.
Its purpose is to serve as an alternative coating adhesive at high temperatures, to soften the thermal shock of high-density energy, and to prevent oxidation of the base material and additive alloys. Additives can include substances that improve the spread of the low melting point metal. (Example)
【表】【table】
【表】
本発明法の実施例として電子ビームを用いて表
と全く同じ条件で比較実験し、全く同一の結果を
得た。ただしこのときの電子ビームの出力は
10kW、被加工物の移動速度は60mm／秒、溶込深
さは７mmであつた。また本発明法の他の実施例と
して直径2.3mmのアルミ管内にモリブデン粉末を
封入し、これを10kWのレーザビームを照射する
溶融部に送り込み、深さ６mmのモリブデン含有量
５％の合金層を得、ブローホールと熱亀裂は良好
であつた。また700℃の溶融アルミ内にモリブデ
ン粉末を混入し、これを被加工物表面に薄層上に
流し、10kWのレーザビームによつて表層の６mm
を溶融しモリブデン含有量５％の合金層を得、ブ
ローホールと熱亀裂は良好であつた。なお以上の
比較はモリブデンのほか、ニツケル、クロム、タ
ングステン、コバルトについても行なつたがブロ
ーホールと熱亀裂に対する改善効果は同様に認め
られた。
以上の結果はレーザビームと電子ビームに基づ
くものであり、局部加熱溶解と急速冷却効果によ
る結晶の微細化効果が最も優れている。その他の
エネルギ密度の高い熱源、例えば燃焼ガス、誘導
加熱、電弧、プラズマなどでも、発明の効果はレ
ーザビームと電子ビームに劣るが、従来の溶射法
よりははるかに優れた性能を得ることができる。
（発明の効果）
以上のように本発明は母材金属にブローホール
や熱亀裂を生じさせずに金属表層部の凝固組織を
微細化し、あるいは合金成分を添加でき、産業上
裨益するところが極めて大である。[Table] As an example of the method of the present invention, a comparative experiment was conducted using an electron beam under exactly the same conditions as in the table, and exactly the same results were obtained. However, the output of the electron beam at this time is
The power was 10kW, the workpiece movement speed was 60mm/sec, and the penetration depth was 7mm. As another example of the method of the present invention, molybdenum powder is sealed in an aluminum tube with a diameter of 2.3 mm, and this is fed into a melting zone that is irradiated with a 10 kW laser beam to form an alloy layer with a depth of 6 mm and a molybdenum content of 5%. The results showed that the blowholes and thermal cracks were good. In addition, molybdenum powder is mixed into molten aluminum at 700℃, poured onto the surface of the workpiece in a thin layer, and a 10kW laser beam is applied to the surface layer by 6mm.
An alloy layer with a molybdenum content of 5% was obtained by melting, and the blowholes and thermal cracks were good. In addition to molybdenum, the above comparison was also made for nickel, chromium, tungsten, and cobalt, and the same improvement effects on blowholes and thermal cracks were observed. The above results are based on laser beams and electron beams, and the crystal miniaturization effect due to local heating melting and rapid cooling effects is the most excellent. With other energy-dense heat sources, such as combustion gases, induction heating, electric arcs, and plasmas, the invention is less effective than laser beams and electron beams, but still provides much better performance than traditional thermal spraying methods. . (Effects of the Invention) As described above, the present invention can refine the solidified structure of the metal surface layer or add alloy components without causing blowholes or thermal cracks in the base metal, and has extremely large industrial benefits. It is.
第１図は本発明実施例法の説明図である。
１：円柱状被加工物、２：回転方向矢印、３：
レーザビーム、４：レーザビーム照射表層部、
５：溶融部、６：押圧ローラ、７：押圧シリン
ダ。
FIG. 1 is an explanatory diagram of an embodiment of the present invention. 1: Cylindrical workpiece, 2: Rotation direction arrow, 3:
Laser beam, 4: Laser beam irradiation surface layer part,
5: Melting part, 6: Pressing roller, 7: Pressing cylinder.
Claims (1)
れ易い物質と前記母材よりも融点の低い金属によ
つて構成される添加剤を存在させて、前記母材金
属表面を不活性ガスによる保護下に局部的に急速
加熱して溶融せしめ、該溶融部を凝固完了前に押
圧ローラによつて押圧成形するとともに急冷する
ことを特徴とする金属表面溶融加工法。 ２ 母材金属表面を局部的に急速加熱する手段
が、レーザビーム或は電子ビームを適用するもの
である特許請求の範囲第１項記載の金属表面溶融
加工法。 ３ 母材金属の表面に、該母材金属よりも酸化さ
れ易い物質と前記母材よりも融点の低い金属によ
つて構成される添加剤を合金成分とともに存在さ
せて、前記母材金属表面を不活性ガスによる保護
下に局部的に急速加熱して溶融せしめ、該溶融部
を凝固完了前に押圧ローラによつて押圧成形する
とともに急冷することを特徴とする金属表面溶融
加工法。 ４ 母材金属表面を局部的に急速加熱する手段
が、レーザビーム或は電子ビームを適用するもの
である特許請求の範囲第３項記載の金属表面の溶
融加工法。[Scope of Claims] 1. Additives composed of a substance that is more easily oxidized than the base metal and a metal having a lower melting point than the base metal are present on the surface of the base metal, 1. A method for melting a metal surface, which is characterized in that the metal surface is locally rapidly heated to melt the metal surface while being protected by an inert gas, and before solidification is completed, the molten portion is press-formed with a pressure roller and rapidly cooled. 2. The metal surface melting processing method according to claim 1, wherein the means for locally rapidly heating the base metal surface applies a laser beam or an electron beam. 3. Additives consisting of a substance that is more easily oxidized than the base metal and a metal with a melting point lower than that of the base metal are present on the surface of the base metal, together with alloy components, to improve the surface of the base metal. 1. A metal surface melt processing method characterized by rapidly heating locally to melt the metal under protection with an inert gas, and before solidification is completed, the melted portion is press-formed with a pressure roller and rapidly cooled. 4. The method of melting and processing a metal surface according to claim 3, wherein the means for locally rapidly heating the base metal surface applies a laser beam or an electron beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59241949A JPS61119615A (en) | 1984-11-16 | 1984-11-16 | Melt-working method of metallic surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59241949A JPS61119615A (en) | 1984-11-16 | 1984-11-16 | Melt-working method of metallic surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61119615A JPS61119615A (en) | 1986-06-06 |
| JPH0261524B2 true JPH0261524B2 (en) | 1990-12-20 |
Family
ID=17081964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59241949A Granted JPS61119615A (en) | 1984-11-16 | 1984-11-16 | Melt-working method of metallic surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61119615A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61296973A (en) * | 1985-06-24 | 1986-12-27 | Toyota Motor Corp | Formation of ceramic particle dispersed composite metallic layer |
| JPS63216979A (en) * | 1987-03-04 | 1988-09-09 | Inoue Japax Res Inc | Surface treatment |
| AT500561B1 (en) * | 2004-05-26 | 2006-12-15 | Miba Sinter Austria Gmbh | PROCESS FOR WELDING A SINTERED FORM BODY |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148752A (en) * | 1976-06-07 | 1977-12-10 | Hitachi Ltd | Fluid static pressure bearing |
| JPS55148752A (en) * | 1979-05-11 | 1980-11-19 | Nippon Steel Corp | Formation method of coating on metal surface |
| JPS5980728A (en) * | 1982-10-29 | 1984-05-10 | Toshiba Corp | Heat treatment of thin sheet |
| JPS5980727A (en) * | 1982-10-27 | 1984-05-10 | Kawasaki Steel Corp | Manufacture of cold rolled steel sheet with high drawability by continuous annealing |
| JPS59121008A (en) * | 1982-12-27 | 1984-07-12 | Tokyo Inst Of Technol | Three-dimensional optical integrated circuit |
-
1984
- 1984-11-16 JP JP59241949A patent/JPS61119615A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148752A (en) * | 1976-06-07 | 1977-12-10 | Hitachi Ltd | Fluid static pressure bearing |
| JPS55148752A (en) * | 1979-05-11 | 1980-11-19 | Nippon Steel Corp | Formation method of coating on metal surface |
| JPS5980727A (en) * | 1982-10-27 | 1984-05-10 | Kawasaki Steel Corp | Manufacture of cold rolled steel sheet with high drawability by continuous annealing |
| JPS5980728A (en) * | 1982-10-29 | 1984-05-10 | Toshiba Corp | Heat treatment of thin sheet |
| JPS59121008A (en) * | 1982-12-27 | 1984-07-12 | Tokyo Inst Of Technol | Three-dimensional optical integrated circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61119615A (en) | 1986-06-06 |
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