JPH0535711B2 - - Google Patents
Info
- Publication number
- JPH0535711B2 JPH0535711B2 JP11051688A JP11051688A JPH0535711B2 JP H0535711 B2 JPH0535711 B2 JP H0535711B2 JP 11051688 A JP11051688 A JP 11051688A JP 11051688 A JP11051688 A JP 11051688A JP H0535711 B2 JPH0535711 B2 JP H0535711B2
- Authority
- JP
- Japan
- Prior art keywords
- torch nozzle
- arc welding
- boron nitride
- hexagonal boron
- welding torch
- 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 - Fee Related
Links
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 22
- 229910052582 BN Inorganic materials 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 12
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 229910010272 inorganic material Inorganic materials 0.000 claims description 4
- 239000011147 inorganic material Substances 0.000 claims description 4
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 claims 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 239000000463 material Substances 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- -1 aluminum oxide compound Chemical class 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005524 ceramic coating Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920001523 phosphate polymer Polymers 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical class [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5062—Borides, Nitrides or Silicides
- C04B41/5064—Boron nitride
Description
〔産業上の利用分野〕
本発明は、金属の溶接作業時に使用するアーク
溶接用トーチノズル（以下、トーチノズルと言
う）に関する。
〔従来の技術〕
一般に金属は融接と言われる方法で接合される
が、融接部の酸化を防止するために不活性ガスに
よるシールを行う。
本発明は融接に使用するトーチ先端にガスシー
ルを行うための機能をそなえたノズルに係る。
従来、ノズルは銅もしくは銅合金を基材とした
もの、鉄もしくは鉄合金を基材としたもの、ある
いはアルミ合金を基材としたもののように金属を
基材とするものと、酸化アルミ系を基材とする
（特開昭62−68682）ものあるいは窒化ケイ素を基
材とする（特開昭62−38772）もののようにセラ
ミツクスを基材としたものがある。金属を基材と
するノズルは金属溶加材および溶融金属部から発
生するスパツタにより、ノズル先端部が閉塞し、
溶接部のガスシールが不完全となり、加えてアー
クの安定性および溶接ワイヤの円滑な送り出しが
阻害される等の欠点がある。又、スパツタとアー
クの熱によつて、ノズル先端部が溶損することも
しばしば生じている。
一方、酸化アルミ系を基材としたセラミツクス
ノズルは、耐熱性に優れるものの、高温で２価ま
たは３価の金属酸化物に接すると、スピネル構造
の化合物を形成しやすく、ノズルに付着したスパ
ツタが剥離し難いという欠点を有する。窒化ケイ
素を基材としたセラミツクスノズルは付着スパツ
タの剥離性、耐熱性のいずれもがほぼ満足できる
もであるが、窒化ケイ素そのものが人工原料であ
ること、難焼結材であるために、1700℃以上の温
度で加圧窒素雰囲気中で焼結するか、ホツトプレ
ス等を用いて熱間圧縮を行わねばならず、ノズル
の価格が従来品の10倍以上と高価である欠点があ
る。
なお、同一出願人は上記、問題点を解決するた
めに特願昭62−330050で「アーク溶接用トーチノ
ズル」を出願した。これはトーチノズル表面に合
金メツキまたは合金＋セラミツクス（六方晶系の
窒化ホウ素）からなるコンポジツトメツキを行う
ことを特徴としている。その後、長期にわたり、
このノズルを使用していると、ノズルに付着する
スパツタによつて、メツキ層表面の性状がわずか
ずつ変化し、当初の性能が失われることが明らか
となつた。本願はこの点を改良するために、酸化
物系無機材料を結合相とし、六方晶系の窒化ホウ
素を含むコーテイング材を発明するに至つた。
〔発明が解決しようとする課題〕
本発明は安価で、従来のノズルより耐久性に富
み、ノズル先端部の溶損防止、付着スパツタ量の
減少、付着スパツタの剥離性の改善をはかつたト
ーチノズルを提供するものである。
〔課題を解決するための手段〕
トーチノズルは液相出現温度が、1400℃以上の
酸化アルミ化合物または炭化ケイ素および窒化ケ
イ素のいずれの材料を用いることができるが、価
格の点から酸化アルミ化合物を用いることが好ま
しい。これらのトーチノズルは焼結、熱間静水圧
および熱間圧縮等の方法でノズル形状に固化する
か、固化後、加工により指定形状に仕上げた後、
表面にセラミツクスコーテイングを行うことを特
徴とする。
コーテイング材は融鉄並びに酸化鉄のいずれと
も反応しない材料で、熱伝導度が大きく、耐酸化
性に優れ、かつ潤滑性を有する六方晶系の窒化ホ
ウ素を有している。
窒化ホウ素は難焼結材であり、それ自体だけで
固化させることは困難である。
この問題に対し、種々検討した結果、窒化ホウ
素をリン酸アルミニウムのポリマーと共存させる
か、ケイ酸ガラスと共存させることによつて、セ
ラミツクス基材との密着力に優れたコーテイング
が可能となり、これらは耐久性に富み、トーチノ
ズル先端部の溶損防止、付着スパツタ量の減少、
付着スパツタの剥離性の改善がはかれることを見
いだした。
以下、組成並びに製造方法の限定理由について
述べる。
(1) 六方晶系の窒化ホウ素は融鉄と酸化鉄のいず
れとも反応しない、熱伝導度が大きい。耐酸化
性を有する。固体潤滑剤であることの性質を利
用するものであつて、５〜98重量％（以下、％
と言う）を必要とする。また基材との密着力お
よびコーテイング材を耐久性の面から考える
と、25〜85％であることがより好ましい。
リン酸アルミニウムは六方晶系の窒化ホウ素
粉とトーチノズル基材もしくは窒化ホウ素同志
の結合剤として用いるものであつて、その量は
２％未満であると十分な結合力が得られず、96
％以上になると、六方晶系の窒化ホウ素の量が
不足するために、付着スパツタの剥離性に十分
な効果が現れない。よつてリン酸アルミニウム
の量は２〜95％とした。
上記組成のコーテイング剤は、リン酸アルミ
ニウムをPH３以下の酸性溶液にして、その内に
六方晶系の窒化ホウ素粉を混合、撹拌、場合に
よつてはミルによる混練を実施したのち、トー
チノズルにハケぬり、スプレー、浸漬等の方法
で塗布し、大気中で500〜1200℃で30〜60分程
度の焼付けを行うことにより得ることができ
る。
なお、リン酸アルミニウムをPH３以下の酸性
溶液にして、その内に六方晶系の窒化ホウ素粉
を混合する場合に、酸化ケイ素粉を５％以下で
含有させることによつて焼付け温度を500℃か
ら300℃に下げることができる。
(2) 酸化ケイ素に六方晶系の窒化ホウ素を５〜98
％を含むコーテイング材も融鉄と酸化鉄のいず
れとも反応しにくく、かつ耐酸化性に富み、さ
らに固体潤滑作用を有する。
酸化ケイ素は２％未満であると十分な結合力
が得られず、96％以上になると付着スパツタの
剥離性の点から問題がある。よつて酸化ケイ素
は２〜95％とした。なおこのスパツタ材が十分
な機能を発揮するには、25〜85％であること
が、より好ましい。
これらのコーテイング材は、六方晶系の窒化
ホウ素をPH11以上としたオルソケイ酸ソーダと
混合、撹拌、場合によつてはミルによる混練を
実施した後、トーチノズルにハケぬり、スプレ
ー、浸漬等の方法で塗布し、大気中もしくは中
性雰囲気中で500〜1200℃の温度で焼付けを行
うことにより得ることができる。
以下、本発明の実施例について説明する。
〔実施例 １〕
酸化クロム５％、残り、主に酸化アルミからな
るトーチノズルを常圧焼結により得た。寸法は外
径21mmφ、内径16mmφ、長さ73mmで、これを硫酸
で酸性にしたリン酸アルミニウム溶液に六方晶系
の窒化ホウ素粉を１：１の比率で混合、撹拌し、
場合によつては数％の有機バインダーを加えてス
ラリーを作成し、このスラリーに浸漬し、引上げ
た後、自然乾燥させた。乾燥後、大気中950℃、
60分の焼付けを行つた。
コーテイング材の厚さは約50μmで、その組成
は、六方晶系の窒化ホウ素が41％、酸化アルミが
13.8％、酸化リンが44.1％、酸化ケイ素0.06％で
残りは鉄、マグネシウム、カルシウム、ナトリウ
ムの各酸化物の合計で１％程度含有している。こ
のトーチノズルを炭酸ガス溶接機を用い、付着ス
パツタ量および剥離性の評価テストを実施した。
溶接条件は
材料；軟鋼板
電極ワイヤ；軟鋼1.2mmφ
電圧−電流；33V−300A
炭酸ガス；20L／min
材料−ノズル間距離；20mm
姿勢；下向き
溶接時間；10min／回
とし、ビードオンプレートで実施した。
結果を第１表に示す。
〔実施例 ２〕
酸化ケイ素３％、酸化ジルコニウム15％、残り
は主に酸化アルミから成るトーチノズル常圧焼結
により得た。寸法は実施例１と同様で、これにオ
ルソケイ酸ソーダと六方晶系の窒化ホウ素を30：
70の比率で混合し、水を加えてPH12に調整したも
のをスプレーで塗布した。自然乾燥後、大気中
600℃で90分焼付けた。このトーチノズルの評価
を実施例１に示す条件で実施した。
〔実施例 ３〕
シリコンナイトライド92％、酸化アルミ２％、
イツトリア５％の組成からなるトーチノズルを実
施例１に示す条件でコーテイングし、焼付けた。
このトーチノズルの評価を実施例１に示す条件
で実施した。
なお、市販の金属系ノズルとセラミツクスコー
テイング処理をしていないトーチノズルについて
も比較例として示した。
[Industrial Application Field] The present invention relates to an arc welding torch nozzle (hereinafter referred to as a torch nozzle) used during metal welding work. [Prior Art] Generally, metals are joined by a method called fusion welding, but in order to prevent oxidation of the fusion weld, sealing is performed with an inert gas. The present invention relates to a nozzle equipped with a function for sealing a gas at the tip of a torch used for fusion welding. Traditionally, nozzles have been made of metals such as copper or copper alloys, iron or iron alloys, or aluminum alloys, and aluminum oxide-based nozzles. There are those that use ceramics as a base material, such as those that use silicon nitride as a base material (Japanese Patent Application Laid-open No. 62-68682) and silicon nitride as a base material (Japanese Patent Application Laid-Open No. 62-38772). For nozzles that are based on metal, the tip of the nozzle may become clogged due to spatter generated from the filler metal and the molten metal.
There are drawbacks such as incomplete gas sealing at the welding area, and in addition, arc stability and smooth feeding of the welding wire are inhibited. Furthermore, the nozzle tip often suffers from melting and damage due to the heat of the spatter and arc. On the other hand, ceramic nozzles based on aluminum oxide have excellent heat resistance, but when they come into contact with divalent or trivalent metal oxides at high temperatures, they tend to form spinel-structured compounds, causing sprittles that adhere to the nozzle. It has the disadvantage of being difficult to peel off. Ceramic nozzles based on silicon nitride are almost satisfactory in terms of peelability of adhering spatter and heat resistance, but since silicon nitride itself is an artificial raw material and is a difficult-to-sinter material, It has to be sintered in a pressurized nitrogen atmosphere at a temperature above 0.degree. C. or hot-pressed using a hot press or the like, and has the disadvantage that the nozzle is more than 10 times more expensive than conventional products. In order to solve the above-mentioned problems, the same applicant filed Japanese Patent Application No. 62-330050 for "A Torch Nozzle for Arc Welding." This is characterized by performing alloy plating or composite plating consisting of alloy + ceramics (hexagonal boron nitride) on the surface of the torch nozzle. After that, for a long time,
It has become clear that when this nozzle is used, the properties of the surface of the plating layer change little by little due to spatter adhering to the nozzle, and the original performance is lost. In order to improve this point, the present application has invented a coating material that uses an oxide-based inorganic material as a binder phase and contains hexagonal boron nitride. [Problems to be Solved by the Invention] The present invention provides a torch nozzle that is inexpensive, more durable than conventional nozzles, prevents melting and damage at the tip of the nozzle, reduces the amount of adhering spatter, and improves the ability to remove adhering spatter. It provides: [Means for solving the problem] The torch nozzle can be made of aluminum oxide compound, silicon carbide, or silicon nitride, which has a liquid phase appearance temperature of 1400°C or higher, but from the viewpoint of cost, aluminum oxide compound is used. It is preferable. These torch nozzles are solidified into a nozzle shape using methods such as sintering, hot isostatic pressure, and hot compression, or after solidification and processing into a specified shape,
It is characterized by ceramic coating on the surface. The coating material is a material that does not react with either molten iron or iron oxide, and contains hexagonal boron nitride, which has high thermal conductivity, excellent oxidation resistance, and lubricity. Boron nitride is a difficult-to-sinter material, and it is difficult to solidify it by itself. As a result of various studies regarding this problem, we found that by coexisting boron nitride with aluminum phosphate polymer or silicate glass, it was possible to create a coating with excellent adhesion to ceramic substrates. is highly durable, prevents melting and damage at the tip of the torch nozzle, reduces the amount of adhering spatter,
It has been found that the removability of adhering spatter can be improved. The reasons for limiting the composition and manufacturing method will be described below. (1) Hexagonal boron nitride does not react with either molten iron or iron oxide and has high thermal conductivity. Has oxidation resistance. It utilizes the property of being a solid lubricant, and has a content of 5 to 98% by weight (hereinafter, %
) is required. Further, when considering the adhesion to the base material and the durability of the coating material, it is more preferably 25 to 85%. Aluminum phosphate is used as a binder between hexagonal boron nitride powder and the torch nozzle base material or boron nitride, and if the amount is less than 2%, sufficient bonding strength cannot be obtained.96
% or more, the amount of hexagonal boron nitride is insufficient, and a sufficient effect on the removability of deposited spatter is not achieved. Therefore, the amount of aluminum phosphate was between 2 and 95%. The coating agent with the above composition is made by converting aluminum phosphate into an acidic solution with a pH of 3 or less, mixing hexagonal boron nitride powder therein, stirring, or in some cases kneading with a mill, and then brushing it with a torch nozzle. It can be obtained by applying by painting, spraying, dipping, etc., and baking in the atmosphere at 500 to 1200°C for about 30 to 60 minutes. In addition, when aluminum phosphate is made into an acidic solution with a pH of 3 or less and hexagonal boron nitride powder is mixed therein, the baking temperature can be lowered from 500℃ by containing silicon oxide powder at 5% or less. The temperature can be lowered to 300℃. (2) Hexagonal boron nitride added to silicon oxide from 5 to 98
% also hardly reacts with either molten iron or iron oxide, has high oxidation resistance, and has a solid lubricating effect. If the amount of silicon oxide is less than 2%, sufficient bonding strength cannot be obtained, and if it is more than 96%, there is a problem in terms of removability of attached spatter. Therefore, the silicon oxide content was 2 to 95%. In order for this sputter material to exhibit sufficient functionality, it is more preferably 25 to 85%. These coating materials are prepared by mixing hexagonal boron nitride with sodium orthosilicate at a pH of 11 or higher, stirring, or in some cases kneading with a mill, and then applying the coating to a torch nozzle by brushing, spraying, dipping, etc. It can be obtained by coating and baking at a temperature of 500 to 1200°C in air or a neutral atmosphere. Examples of the present invention will be described below. [Example 1] A torch nozzle consisting of 5% chromium oxide and the rest mainly aluminum oxide was obtained by pressureless sintering. The dimensions are outer diameter 21mmφ, inner diameter 16mmφ, and length 73mm, and hexagonal boron nitride powder is mixed in a 1:1 ratio with an aluminum phosphate solution acidified with sulfuric acid and stirred.
In some cases, several percent of an organic binder was added to prepare a slurry, which was immersed in the slurry, pulled up, and air-dried. After drying, 950℃ in the atmosphere,
I baked for 60 minutes. The thickness of the coating material is approximately 50μm, and its composition is 41% hexagonal boron nitride and aluminum oxide.
13.8%, 44.1% phosphorus oxide, 0.06% silicon oxide, and the rest is approximately 1% in total of iron, magnesium, calcium, and sodium oxides. Using this torch nozzle, a carbon dioxide gas welding machine was used to evaluate the amount of attached spatter and peelability. The welding conditions were: Material: Mild steel plate electrode wire; Mild steel 1.2mmφ Voltage-current: 33V-300A Carbon dioxide gas: 20L/min Material-nozzle distance: 20mm Posture: Downward welding time: 10min/time Welding was performed on a bead-on-plate. . The results are shown in Table 1. [Example 2] Obtained by normal pressure sintering with a torch nozzle consisting of 3% silicon oxide, 15% zirconium oxide, and the rest mainly aluminum oxide. The dimensions are the same as in Example 1, and sodium orthosilicate and hexagonal boron nitride are added at 30:
The mixture was mixed at a ratio of 70%, water was added to adjust the pH to 12, and the mixture was applied by spray. After natural drying, in the atmosphere
Baked at 600℃ for 90 minutes. This torch nozzle was evaluated under the conditions shown in Example 1. [Example 3] 92% silicon nitride, 2% aluminum oxide,
A torch nozzle having a composition of 5% yttria was coated and baked under the conditions shown in Example 1. This torch nozzle was evaluated under the conditions shown in Example 1. A commercially available metal nozzle and a torch nozzle without ceramic coating were also shown as comparative examples.
第１表で明らかなように、トーチノズルの表面
に六方晶の窒化ホウ素と無機系酸化物からなるコ
ーテイングを行うことによつて、スパツタ付着量
が1/2〜1/3に減少し、かつ、付着スパツタ剥離性
が良好で、かつ、くり返しの使用に対しても、こ
の剥離性は低下しない。そのため付着スパツタの
剥離作業の減少、ノズルの長寿命化に優れた効果
があり、高価な窒化ホウ素の使用量が少なくてす
むので安価なトーチノズルが供給できる。
As is clear from Table 1, by coating the surface of the torch nozzle with hexagonal boron nitride and an inorganic oxide, the amount of spatter deposited is reduced to 1/2 to 1/3, and It has good removability of adhesion spatter and does not deteriorate even after repeated use. Therefore, it has excellent effects in reducing the work of removing adhering spatter and extending the life of the nozzle, and since the amount of expensive boron nitride used can be reduced, an inexpensive torch nozzle can be supplied.
Claims (1)
チノズルに六方晶系の窒化ホウ素５〜98重量％と
該窒化ホウ素を結合させる結合剤として、酸化物
系無機材料を２〜95重量％を含むセラミツクスで
被覆することを特徴とするアーク溶接用トーチノ
ズル。 ２ 酸化物系無機材料がリン酸アルミニウムであ
る請求項第１項記載のアーク溶接用トーチノズ
ル。 ３ 酸化物系無機材料がケイ酸である請求項第１
項記載のアーク溶接用トーチノズル。 ４ セラミツクスを基材とするアーク溶接用トー
チノズルに、六方晶系の窒化ホウ素粉と、酸性リ
ン酸アルミニウム溶液の混合物を塗布した後、
500〜1200℃で加熱処理することを特徴とするア
ーク溶接用トーチノズルの製造方法。 ５ セラミツクスを基材とするアーク溶接用トー
チノズルに、六方晶系の窒化ホウ素粉と酸性リン
酸アルミニウム溶液さらに酸化ケイ素粉を含有さ
せた混合物を塗布した後、300〜1200℃で加熱処
理することを特徴とするアーク溶接用トーチノズ
ルの製造方法。 ６ 六方晶系の窒化ホウ素粉と酸性リン酸アルミ
ニウム溶液の混合物のPH値を３以下とした請求項
第４項または第５項記載のアーク溶接用トーチノ
ズルの製造方法。 ７ セラミツクスを基材とするアーク溶接用トー
チノズルに、六方晶系の窒化ホウ素粉とオルソケ
イ酸ソーダの混合物を塗布した後、500〜1200℃
で加熱処理することを特徴とするアーク溶接用ト
ーチノズルの製造方法。 ８ 六方晶系の窒化ホウ素粉とオルソケイ酸ソー
ダの混合物のPH値を11以上とした請求項第７項記
載のアーク溶接用トーチノズルの製造方法。[Scope of Claims] 1. 5 to 98% by weight of hexagonal boron nitride and 2 to 95% by weight of an oxide-based inorganic material as a binder for bonding the boron nitride to a ceramic-based arc welding torch nozzle. A torch nozzle for arc welding characterized by being coated with ceramics containing %. 2. The arc welding torch nozzle according to claim 1, wherein the oxide-based inorganic material is aluminum phosphate. 3. Claim 1, wherein the oxide-based inorganic material is silicic acid.
Torch nozzle for arc welding as described in section. 4. After applying a mixture of hexagonal boron nitride powder and acidic aluminum phosphate solution to a ceramic-based arc welding torch nozzle,
A method for manufacturing an arc welding torch nozzle, characterized by heat treatment at 500 to 1200°C. 5 After applying a mixture containing hexagonal boron nitride powder, acidic aluminum phosphate solution, and silicon oxide powder to a ceramic-based arc welding torch nozzle, heat treatment is performed at 300 to 1200 °C. A method for manufacturing a torch nozzle for arc welding. 6. The method for manufacturing an arc welding torch nozzle according to claim 4 or 5, wherein the mixture of hexagonal boron nitride powder and acidic aluminum phosphate solution has a pH value of 3 or less. 7 After applying a mixture of hexagonal boron nitride powder and sodium orthosilicate to a ceramic-based arc welding torch nozzle, heat the mixture to 500 to 1200°C.
1. A method for manufacturing an arc welding torch nozzle, the method comprising heating the torch nozzle. 8. The method for manufacturing an arc welding torch nozzle according to claim 7, wherein the mixture of hexagonal boron nitride powder and sodium orthosilicate has a PH value of 11 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11051688A JPH01282177A (en) | 1988-05-09 | 1988-05-09 | Torch nozzle for arc welding and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11051688A JPH01282177A (en) | 1988-05-09 | 1988-05-09 | Torch nozzle for arc welding and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01282177A JPH01282177A (en) | 1989-11-14 |
| JPH0535711B2 true JPH0535711B2 (en) | 1993-05-27 |
Family
ID=14537776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11051688A Granted JPH01282177A (en) | 1988-05-09 | 1988-05-09 | Torch nozzle for arc welding and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01282177A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2423030T3 (en) * | 2008-06-18 | 2013-09-17 | Henkel Ag & Co. Kgaa | Procedure and apparatus for automatic maintenance of a welding torch head |
-
1988
- 1988-05-09 JP JP11051688A patent/JPH01282177A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01282177A (en) | 1989-11-14 |
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