JPS60106691A - Alloy for brazing - Google Patents

Abstract

PURPOSE:To provide an Ni-Cu alloy for brazing having high joint strength and excellent fluidity and corrosion resistance be incorporating a specific ratio of Cu, B and Si into Ni. CONSTITUTION:An alloy for brazing consisting, by atomic %, of Ni; Bal, 3<=Cu <=30, 0<=B<=15, 0<=Si<=20 and unavoidable impurities in addition thereto is prepd. The alloy is best suitable for joining of a sleeve consisting of a tool steel material and a shaft consisting of a cast iron material. The strength and corrosion resistance at a high temp. can be increased by substituting one or >=2 kinds among <=10% Cr, Mo, W, V, Nb, Zr and Ti by atomic % with Ni and if the brazing material is made finely crystalline or amorphous by cooling ultraquickly said material at a rate of >=10<4> deg.C/sec, the brazing material having toughness without having segregation is obtd.

Description

【発明の詳細な説明】 本発明はろう材用合金に関するものであり、特に工具鋼
材のスリーブと鋳鉄材のシＶ）【・を接合するに最適な
、高強度でしかも低融点で工具材のスリーブの硬化熱処
理と接合を同時に行えるろう材用合金に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alloy for brazing filler metal, and in particular, it is a high-strength, low-melting-point alloy that is ideal for joining tool steel sleeves and cast iron sleeves. The present invention relates to an alloy for brazing filler metal that allows sleeve hardening heat treatment and bonding to be performed at the same time.

ＳＫＤ級のダイス鋼や高炭素の鋳造高速度鋼の焼入温度
は９８０・〜１１００℃の間にある。シＶフトヤローラ
ーなどの部品製造において、］スト面や製造時の破壊事
故などの問題から中心部のシトフトに安価で靭性のある
鋼やダクタイル鋳鉄を使用し、外層の部分に上記工具鋼
を使用することは実現されている。このような手法とし
ては、鋳造時に内外層を溶着けしめる手法や、焼バメｔ
ｉどの手法がとられている。しかし、＃ｒｉ造による手
法では、内外筒材質の溶融点の差による鋳造欠陥の発生
の問題や、発生ずるガスによる鋳造欠陥の問題および鋳
造時の工具鋼材の元素偏析の問題などにより、一部の用
途にしか使用されない。一方、焼バメによる手法の場合
には、切削性の悪い工具材料を精密に加工を実施しなけ
ればならず経済的に不利である。また、焼バメによりス
リーブ材に発生する引張応力により使用時の応力とあわ
Ｕだ応力と重なって割損に至る場合もある。ごのような
問題点を克服するため、ろう付による手法が考えられて
いる。しかし、従来のろう材用合金では強度、ぬれ性、
接合温度等の問題により実用に供することが出来な／）
・つだ。例えば、銀ろうは低融点であるが、ぬれ性が劣
り、欠陥が生じ易く、また接合強度が低い。また、従来
のＮｉベース材は９８０〜１１００℃では接合強度が低
く、また、合金によっては接合にいたらない。The quenching temperature of SKD grade die steel and high carbon cast high speed steel is between 980 and 1100°C. In manufacturing parts such as shaft rollers, we use inexpensive and tough steel or ductile cast iron for the center shaft due to problems such as stress and breakage during manufacturing, and use the above-mentioned tool steel for the outer layer. What we want to do has been achieved. Such methods include welding the inner and outer layers during casting, and shrink fitting.
i Which method is being used? However, with the #ri construction method, there are some problems such as the occurrence of casting defects due to the difference in the melting point of the inner and outer cylinder materials, the problem of casting defects due to generated gas, and the problem of element segregation in tool steel materials during casting. It is only used for this purpose. On the other hand, in the case of the shrink fit method, a tool material with poor machinability must be precisely machined, which is economically disadvantageous. Furthermore, the tensile stress generated in the sleeve material due to shrinkage fitting may overlap with the stress during use, leading to breakage. In order to overcome these problems, methods using brazing have been considered. However, conventional brazing alloys lack strength, wettability,
It cannot be put to practical use due to problems such as bonding temperature.
・Tsuda. For example, silver solder has a low melting point, but has poor wettability, is prone to defects, and has low bonding strength. Further, conventional Ni-based materials have low bonding strength at temperatures of 980 to 1100° C., and some alloys cannot be bonded.

本発明は従来技術のこのような欠点を改良し、内部に欠
陥を有せず、また部品表面に引張応力を発生せしめず、
更に１稈が単純であり、得られた接合部の強度が高いろ
う材用合金を得ることにある。The present invention improves these drawbacks of the prior art, has no internal defects, does not generate tensile stress on the surface of the part,
Another object of the present invention is to obtain an alloy for brazing filler metal that is simple in one culm and has high strength in the resulting joint.

発明者等はＮｉベース材にＣ１１を添加することにより
目的合致したろう材用合金を見出した。The inventors have discovered a filler metal alloy that meets the purpose by adding C11 to the Ni base material.

本発明は、工具鋼の焼入温度である。９８０〜１１００
℃で接合可能で、公知の材料より接合強度が高く、接合
時の流動性にすぐれ、また耐蝕性にもづぐれたＮ１−Ｃ
ＩＪ系のろうイ」用合金を提供するものでＣ１の添加に
よる接合温度の低下、接合強度の上昇を利用しており、
下記のような特長がある。The present invention is the quenching temperature of tool steel. 980-1100
N1-C can be bonded at ℃, has higher bonding strength than known materials, has excellent fluidity during bonding, and has excellent corrosion resistance.
It provides an alloy for IJ-based brazing, and takes advantage of the lower bonding temperature and increase in bonding strength due to the addition of C1.
It has the following features.

１、工具鋼の焼入作業とろう付作業を同時に行えるため
経済的である。1. It is economical because the hardening work and brazing work of tool steel can be done at the same time.

２、、　９８０〜１１００℃での接合強度が、ｊＩＳＢ
Ｎｉ系やＢＡ（］系のろう材よりも高い。またＢ　Ａ　
Ｕ系に比較して経済的である。2. The bonding strength at 980-1100℃ is jISB
Higher than Ni-based or BA(]-based brazing filler metals.Also, BA
It is more economical than the U type.

３、工具鋼とのぬれ性、流動性にづぐれ、接合面の欠陥
が少ない。3. Excellent wettability and fluidity with tool steel, and fewer defects on the joint surface.

４、接合部は耐蝕性が高く腐食による脆化も起りにくい
。4. The joints have high corrosion resistance and are less likely to become brittle due to corrosion.

５、Ｃｒ、Ｍｏ、Ｗ、Ｖ、Ｎｂ、Ｚｒ、Ｔｉの添加によ
り高温での強度や耐蝕性を増加出来る。5. Strength and corrosion resistance at high temperatures can be increased by adding Cr, Mo, W, V, Nb, Zr, and Ti.

６、本合金を超急冷して微細結晶質または非晶質にづる
ことにより偏析がなく靭性の有るろう材を得ることが出
来る。6. By ultra-quenching this alloy to form a fine crystalline or amorphous alloy, it is possible to obtain a brazing filler metal that is free from segregation and has toughness.

以下、本発明を実施例に基づき説明づる。The present invention will be explained below based on examples.

実施例１ 外径２２０φ、内径１６０φの高炭素工具鋼と、外径１
６０φの球状黒鉛鋳鉄を第１図のにうに配置し、本発明
のろうイ１用台金で１０００℃×６０分の保持により真
空中で接合を行った。ギャップは径で０．５ｍｍであっ
た。第１表にその組成を示１゜ 粉末のろう材の組成は原子％では、Ｎｉ１３９％。Example 1 High carbon tool steel with an outer diameter of 220φ and an inner diameter of 160φ, and an outer diameter of 1
Spheroidal graphite cast iron of 60φ was placed as shown in FIG. 1, and bonded in vacuum by holding it at 1000° C. for 60 minutes using the base metal for solder I of the present invention. The gap was 0.5 mm in diameter. Table 1 shows its composition.The composition of the 1° powder brazing filler metal is 139% Ni in atomic percent.

Ｃｕ１０％、５ｉ１２％、８９％である。接合後急冷し
、５５０℃ｘ５１＋ｒの焼鈍を行った。超音波で検査　
Ｉしたところ欠陥は認められなかった。硬度は外スリー
ブがｌ−Ｉ　ＳＯ９０、シーシフトがＨｓｃ４５であっ
た。Cu: 10%, 5i: 12%, 89%. After joining, it was rapidly cooled and annealed at 550°C x 51+r. Examination with ultrasound
No defects were found upon inspection. The hardness was 1-I SO90 for the outer sleeve and Hsc45 for the sea shift.

接合後の材料から第２図の如く引張試験用デストビース
を採取し試験を行った。その結果、破断はろう材と外ス
リーブ材の境界より発生し、破断応ツノは３２ｋｇ／ｍ
ｍ’であった。同一の条件で１３Ａ！＋−８，ＢＡ！；
Ｉ−５で接合を行った場合にはろう材が接合面にゆきわ
たっておらず接合強度はそれぞれ１８ｋｇ／１１１ｍ’
　、　２１ｋｇ／ｍｍ２であった。また、Ｐを含有する
ＢＮｉ　−６ではろう材は全面にゆきわたっていたが、
破断強さは１９ｋｇ／’ｍ１であった。A tensile test bead was taken from the joined material as shown in Figure 2 and tested. As a result, the fracture occurred at the boundary between the brazing material and the outer sleeve material, and the fracture stress was 32 kg/m.
It was m'. 13A under the same conditions! +-8, BA! ;
When joining was performed using I-5, the brazing metal did not spread over the joint surface, and the joint strength was 18 kg/111 m'.
, 21 kg/mm2. In addition, in BNi-6 containing P, the brazing filler metal was spread over the entire surface,
The breaking strength was 19 kg/'m1.

実施例２ 直径２５φの炭素鋼に第２表に示するう（＝Ｊ用台金の
箔を２層に巻回した後、外径３５φの５ＫＤ１１種のス
リーブをかぶせた後、１０００℃より油冷し１５０℃で
焼戻しを行った。Example 2 Carbon steel with a diameter of 25φ was wrapped with foil of the J base metal shown in Table 2 in two layers, and then covered with a 5KD 11 type sleeve with an outer diameter of 35φ, and then heated with oil at 1000℃. It was cooled and tempered at 150°C.

接合後外スリーブを固定し、内層を圧し破断する応力を
もとめることにより接合強度を測定した。After bonding, the outer sleeve was fixed, and the bonding strength was measured by pressing the inner layer and determining the stress that caused it to break.

このように、Ｃｕを添加した本発明の合金によれば、高
い接合強度を１ｑることが出来る。As described above, according to the alloy of the present invention to which Cu is added, a high bonding strength of 1q can be achieved.

第３図は接合強度の測定方法を示し、第４図。FIG. 3 shows a method for measuring bonding strength, and FIG.

第５図は第３図の手法で測定した接合強度の例を示す。FIG. 5 shows an example of bond strength measured by the method shown in FIG.

本発明合金は以上の如くであり、工具鋼。The alloy of the present invention is as described above, and is a tool steel.

鋳造高速度鋼の焼入作業と同時に接合作業が可能であり
経済的であると共に、従来合金に比較して高い接合強度
が得られる。また、湯流れは良好で接合面の欠陥も少な
い。水晶はＮ１−ＣＬＩベースであるため本質的に耐蝕
性良好であり、接合部の腐食による劣化も少ない。It is possible to perform the joining work at the same time as the hardening work of cast high-speed steel, which is economical, and provides higher joining strength than conventional alloys. In addition, the melt flow is good and there are few defects on the joint surfaces. Since the crystal is based on N1-CLI, it has inherently good corrosion resistance, and there is little deterioration due to corrosion at the joints.

本発明のろう伺用合金を使用すれば、高い接合強度を右
する複合材料を経済的に得ることが出来、しかもろう材
料のぬれ性が良く欠陥も発生しにくい。また内外層を適
正に選択することにより表面に圧縮残留応力を発生せし
めることが出来、これにより耐事故性は大幅に改良され
る。By using the soldering alloy of the present invention, it is possible to economically obtain a composite material with high bonding strength, and the wetting properties of the solder material are good and defects are less likely to occur. Furthermore, by appropriately selecting the inner and outer layers, it is possible to generate compressive residual stress on the surface, which greatly improves accident resistance.

本発明はこのような優れた特性を有するものＣあり、産
業界への貢献大である。The present invention has such excellent characteristics and is a great contribution to industry.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は実施例１の接合方法を示す図、第２図は引張試
験片の採取位置を示す図、第３図は接合強度の評価方法
を示す図、第４図は各種ろう材の接合強度の接合温度に
よる変化を示す図、第５図は各種ろうＩの１０５０℃に
おける接合強度の保持時間の影響を示１図である。 １：外スリーブ、２：ろう何部、３：シャフ１−１４ニ
アストピース採取位置 第　ｌ　図 第２図 第３　＠ 第４図 ゑ 終 占 皓 接４敗度（’（１：） 第５　＠ 保持府１１！（常ｉガ）Figure 1 is a diagram showing the joining method of Example 1, Figure 2 is a diagram showing the sampling position of the tensile test piece, Figure 3 is a diagram showing the evaluation method of joint strength, and Figure 4 is a diagram showing the joining of various brazing materials. FIG. 5 is a diagram showing changes in strength due to bonding temperature, and FIG. 5 is a diagram showing the influence of holding time on bonding strength of various types of solder I at 1050°C. 1: Outer sleeve, 2: How many parts, 3: Shaft 1-14 Nearest piece collection position No. l Fig. 2 Fig. 3 @ Fig. 4 Fu 11! (Tokyo Iga)

Claims (1)

【特許請求の範囲】 １、原子％でＮｉＢａ１，３≦Ｃｕ≦３０．０≦Ｂ≦１
５．０≦８１≦２０．他に不可避の不純物よりなること
を特徴とづるろう材用合金。 ２、原子％テ１０％以下のＣｒ　、　Ｍｏ　、　Ｗ、　
Ｖ、　Ｎｂ。 Ｚｒ、Ｔｉのうちの一種または二種以上をＮ１ど置換し
ｌこことを特徴とする特許請求の範囲第１項記載のろう
イ」用合金。 ３、ろう材が１０４℃／ｓｅａ以上の透電で冷部された
結晶質または非晶質の粉末または箔であることを特徴と
する特許請求の範囲第１項または第２項記載のろう（＝
Ｊ用金合金[Claims] 1. NiBa1,3≦Cu≦30.0≦B≦1 in atomic %
5.0≦81≦20. An alloy for brazing filler metal characterized by containing other unavoidable impurities. 2. Cr, Mo, W with an atomic percentage of 10% or less,
V, Nb. The alloy for solder according to claim 1, characterized in that one or more of Zr and Ti is substituted with N1. 3. The brazing material according to claim 1 or 2, characterized in that the brazing material is a crystalline or amorphous powder or foil cooled with a conductivity of 104° C./sea or higher ( =
Gold alloy for J