JPH05123890A - Brazing filler metal for circular truncated cone ring consisting of rapidly solidified foil and production thereof - Google Patents

Abstract

PURPOSE:To easily produce the brazing filler metal of a circular truncated cone ring shape to be used for joining steel pipes not by blanking this material from a sheet but by injecting the molten brazing filler metal to a roll surface of a tapered shape and rapidly solidifying this material. CONSTITUTION:A roll 6 having a circular truncated cone shape is rotated at a high speed. A molten brazer 8 is sprayed to the tapered surface 7 of the roll through a nozzle 9 in proximity to the surface 7 and parallel with the surface from a container housing the brazer 8. The brazer 8 solidifies rapidly to form a foil-shaped tape 10 which has the circular truncated cone ring shape. Gases are sprayed from a nozzle 11 to the roll surface and the tape 10 is peeled and cut to a prescribed length.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing filler metal which is made of a rapidly solidified foil produced by a single roll method and is used in the shape of a truncated cone ring for welding a steel pipe, and a method for producing the same.

[0002]

2. Description of the Related Art In conventional welded joints of steel pipes, flash butt welding is performed on relatively small-diameter pipes made of low carbon steel, and expensive MI is expensive for relatively high-grade steel pipes made of alloy steel.
G and TIG welding are performed.

On the other hand, a brazing method is used for joints of special-type pipes such as oil well steel pipes. This method, as shown in FIG. 3, at the respective connecting portions of the pair of steel pipes 1 and 2,
When a concave taper 3 and a convex taper 4 having an inclination of an angle α are provided and one steel pipe 1 joint part is fitted with the other steel pipe 2 joint part, a conical truncated ring shape is formed between the concave and convex taper parts 3 and 4. After the brazing material 5 is inserted, it is heated and brazed and joined, so that the joining can be performed relatively inexpensively. However, since the truncated cone ring-shaped brazing filler metal 5 is conventionally produced by cutting out from a sheet-shaped brazing filler metal, there are problems that many cut-off portions occur, the yield is reduced, and the cutting process takes time.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above problems in joining using a brazing filler metal, and provides a rapidly solidified foil itself produced by a single roll method with an improved roll shape. An object of the present invention is to provide a brazing material for a truncated cone ring and a method for manufacturing the same by using a tape curved to a predetermined curvature.

[0005]

In order to achieve the above object, the present invention has the following structures. (1) A truncated cone made of a rapidly solidified foil, which is manufactured by using a single taper roll and is a series of curved tapes, which forms a true truncated cone ring when wound with a predetermined diameter. Brazing material for rings.

(2) The single roll surface is formed into a taper shape, the nozzle surface of the molten metal container is positioned close to the taper surface and substantially parallel to the taper surface, and melted on the taper surface of the roll rotating at a high speed. A method for manufacturing a brazing material for a truncated cone ring, which is made of a rapidly solidified foil, characterized by ejecting metal.

The present invention will be described in detail below. FIG. 1 shows an outline of equipment for carrying out the method of the present invention. That is, 6 is a quenching roll having a truncated cone shape having a tapered surface 7 inclined at an angle β. Reference numeral 8 denotes a container having a nozzle 9 for containing the molten metal and ejecting the molten metal, 10 a rapidly solidified foil (a brazing material tape), and 11 a gas injection nozzle for separating the rapidly solidified foil 9 from the rapid cooling roll 6. Reference numeral 12 is a rotating shaft of the quenching roll 6. FIG. 2 shows a plane of the nozzle 9, in which a plurality of slits 13 for jetting the molten metal are inclined and formed in parallel with each other by γ degrees.

When the brazing filler metal is manufactured by the above apparatus, the container 8 is positioned so that the surface of the nozzle 9 is parallel to the tapered surface 7 of the cooling roll 6, and the molten metal contained in the container 8 is ejected. To do. That is, the taper angle β forming the truncated cone of the cooling roll 6 is not particularly limited, but it is preferable that the taper angle β is designed and processed in advance so as to fit the desired truncated cone ring shape, and the surface speed is 10 m / sec. The molten metal ejected from the perforated slits 13 forms a uniform pool in a small gap set between the tapered surface 7 of the roll rotating at a high speed and the nozzle 9 substantially in parallel.
While being in contact with the surface of the roll that is rotating at a high speed, it is rapidly cooled and solidified to form a foil (tape) having a thickness of approximately 100 μm or less, which is conveyed on the roll surface. The tape 10 attached to the roll surface and conveyed is blown with a gas from the nozzle 11 onto the roll surface, separated from the roll surface, and cut into a predetermined length.

The thus-obtained tape 10 becomes a series of curved strips conforming to the taper shape of the cooling roll used, and when this tape is wound with a predetermined diameter, it is a true truncated cone ring of a desired size. It can be 5. The size of the diameter of the truncated cone ring can be changed by controlling the molten metal injection position of the nozzle onto the cooling roll used during casting.

[0010]

[Example] Outer diameter 254 mm, inner diameter 228.6 mm, wall thickness 1
When joining a 2.7 mm steel pipe, the joint portion was formed into a concave taper and a convex taper as shown in FIG. 1, and the taper angle α was 45 °. On the other hand, the cooling roll for producing the brazing material is a single roll with a taper as shown in FIG. 1, and the bottom major axis a of the roll is 280 mm, the cutting minor axis b is 180 mm, and the width c is 50 mm.
configured to mm. The rotation speed of this roll is 1600 rpm
And Fe-9 wt% Si-1.5 dissolved and stored in a container.
200 g of a molten alloy composed of wt% B was jetted onto the roll surface and rapidly solidified. The container used is made of quartz and has a nozzle as shown in FIG. The nozzle was installed so that the end of the nozzle was located 18 mm below the taper starting point from the long diameter side of the roll. The obtained tape had a width of about 18 mm and a thickness of 28 μm, and was cut by one round of the roll and the cut portions were butted against each other to form a ring, which was 252 mm on the major diameter side and 227 mm on the minor diameter side. Became. This is a size that matches the shape of the steel pipe joint when fitted, and was extremely suitable as a brazing filler metal for joints.

[0011]

As described above, the frusto-conical ring-shaped brazing material of the present invention can be manufactured directly from the molten metal, instead of being cut and manufactured from a sheet-shaped foil as in the conventional case, and therefore the manufacturing cost and Workability is significantly improved. Also, the truncated cone ring thus obtained can be easily made into a desired size by matching the roll shape to be used with the taper shape of the steel pipe joint to be connected and selecting the ejection position. You can

[Brief description of drawings]

FIG. 1 shows an outline of equipment for carrying out the method of the present invention.

FIG. 2 shows an example of a nozzle used in the device of the present invention.

FIG. 3 is a diagram showing a brazing joint system for a steel pipe.

[Explanation of symbols]

 1, 2: steel pipe 3, 4: concave and convex taper 5: truncated cone ring-shaped brazing material 6: cooling roll 7: taper surface 8: container 9: nozzle 10: rapidly solidified foil (brazing material) 11: gas injection nozzle 12: Rotation axis

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B23K 35/40 H 7362-4E

Claims (2)

[Claims] 1. A series of curved tapes produced using a single taper roll, comprising a rapidly solidified foil which, when wound with a predetermined diameter, forms a true frustoconical ring. Brazing material for truncated cone ring. 2. A single roll surface is formed in a taper shape, a nozzle surface of a molten metal container is positioned close to and substantially parallel to the tapered surface, and a molten metal is formed on the tapered surface of the roll rotating at a high speed. A process for producing a brazing filler metal for a truncated cone ring, which is made of a rapidly solidified foil, characterized in that it spouts.