EP0099599B1 - Method of forming continuous strip of amorphous metal - Google Patents

Method of forming continuous strip of amorphous metal Download PDF

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Publication number
EP0099599B1
EP0099599B1 EP83200882A EP83200882A EP0099599B1 EP 0099599 B1 EP0099599 B1 EP 0099599B1 EP 83200882 A EP83200882 A EP 83200882A EP 83200882 A EP83200882 A EP 83200882A EP 0099599 B1 EP0099599 B1 EP 0099599B1
Authority
EP
European Patent Office
Prior art keywords
jets
strip
row
metal
nozzle
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
Application number
EP83200882A
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German (de)
English (en)
French (fr)
Other versions
EP0099599A1 (en
Inventor
Johannes Bernardus Antonius Bosman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Akzo NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Akzo NV filed Critical Akzo NV
Priority to AT83200882T priority Critical patent/ATE18726T1/de
Publication of EP0099599A1 publication Critical patent/EP0099599A1/en
Application granted granted Critical
Publication of EP0099599B1 publication Critical patent/EP0099599B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B22D11/0642—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces

Definitions

  • the invention relates to a method of forming a continuous strip of amorphous metal, comprising forcing a row of jets of molten metal through a corresponding row of orifices in the nozzle of a reservoir for the molten metal onto a chill surface moving transverse to said row and within a distance of 2,5 mm from said nozzle, on which surface the jets join together to form a melt puddle for solidification of the metal into an amorphous strip which is carried off by the chill surface.
  • U.S. Patent Specification 4 154380 shows a nozzle for making amorphous metal strip using 2 coaxial slit-shaped orifices and a nozzle provided with a row of 3 round openings for the jets of liquid metal.
  • German Patent application 29 38 709 discloses a process and apparatus for making amorphous metal strip using relatively large orifices to avoid clogging. These orifices have a dimension in the range of 1.5 ⁇ 6.0 mm in the direction of the movement of the chill surface.
  • European Patent application 50 397 discloses a process and apparatus for making a rapidly quenched, cast metallic strip comprising a plurality of dissimilar longitudinal portions. Each individual portion of the strip is metallurgically alloy-bonded to the edges of adjacent portions.,along the longitudinal extent of the strip during casting. To that end separate streams of molten metal from separate crucibles are delivered onto the casting surface. The crucibles and their nozzles are arranged such that on the casting surface the peripheral edge portion of one stream contacts the peripheral edge portion of the adjacent stream.
  • amorphous metal strip having a maximum thickness of about 30-40 11m is too thin. Because of this extremely small thickness the strip is very vulnerable mechanically and as a rule it does not quite satisfy the set standards of rigidity and strength and hence stability of shape.
  • amorphous metal strip including that of Fe-alloys, having a thickness greater than that of the known range of 30-40 11m and having uniform properties.
  • the invention now has for its object to make metal strip by the melt spinning process in which use is made of a chill surface and the metal is solidified substantially in the amorphous state and the resulting metal strip has a greater thickness than realized with the previously known method and has a uniform thickness and width.
  • amorphous metal is to be understood here a metal in which no crystalline phase can be detected by X-ray diffractometry.
  • the method according to the invention is characterized in that the metal is forced against the chill surface using at least two parallel rows of jets emerging from parallel rows of orifices in the same nozzle and the jets of all rows together form the melt puddle.
  • the unexpected result of this method is that the thickness of the amorphous strip obtained is considerably greater and far more regular than can be realized by using 1 row of jets of liquid metal and, moreover, a considerably wider strip can be obtained than with said use of a single row of jets. This is the more surprising in that in prior art disclosures it was considered that the use of a plurality of jets could not possibly lead to wider strip having uniform properties.
  • the use of 2 or more parallel rows of jets of liquid metal also results in greatly reduced instability in the melt puddle and hence in suppression of variation in strip thickness and width.
  • the favourable result obtained in making amorphous strip is particularly manifest in that with the amorphous phase being retained, the metal strip can be made at least 1,5 times as thick as by spinning from a slotted nozzle under identical conditions, It is preferred that the jets of a liquid metal should be arranged in 3 ⁇ 4 rows. The rows need not be spaced at equal distances and the jets of the successive rows need not be staggered. Also the number of jets per row may differ. It is preferred that the rows should each be perfectly straight, but there is no absolute need for that.
  • One or more of the rows may be arranged slightly curved or be interrupted for influencing the cross-sectional shape of the strip.
  • the nozzle orifices in which the jets are formed may best be circular, but other forms, such as short slots, also may be used.
  • the distance from the centres of the jets of the first row to those of the last row should not be greater than 10 mm.
  • a distance not greater than 5 mm may be preferred.
  • the diameter of jets having a circular cross section may with advantage be chosen in the range of from 0,5 to 1,0 mm and the centre-to-centre distance between 2 jets of a row in the range of 1,1-2 times the diameter.
  • the jets of a row may be of different thicknesses for influencing the cross-sectional shape of the strip.
  • Comparative melt spinning experiments in which use is made of a single jet formed in the slotted nozzle as described in the aforementioned US Patent Specification 4 221 257 and several rows of jets according to the invention demonstrate that the absolute uniformity of the thickness and the width obtained in the process of the present invention is hardly or not smaller than that of strip obtained using a single slot, but that the relative uniformity bf the thickness is generally somewhat more favourable.
  • flank angle i.e. the angle between a side face of the strip and the base
  • a large flank angle and a high relative uniformity of thickness are especially desired when making amorphous strip which is assembled into laminates. It is desirable then that the strips should fit together as closely as possible when placed side by side or one upon the other. This is of great importance in processing amorphous strip into a laminate for making electromagnetic cores as described in Netherlands Patent Application 8 201 427.
  • the stacking fraction of the metal in the cores should be as high as possible.
  • amorphous strip of alloys of the MmZz type wherein M is Fe, Ni, Co or blends thereof and Z is a metalloid, such as C, P, B, Si, AI or blends thereof and m is 70-90 at.% and z is 30-10 at.%.
  • Part of the Fe, Ni and/or CO content may be replaced with other metals, such as Mn, Mo, Cr and the like.
  • Such compositions of alloys rendered amorphous by very rapid cooling are mentioned in, among other publications, Acta Metallurgica Vo. 20, April 1972, pp. 485-491, and U.S. Patent Specification 3856513.
  • Metal strips of these alloys are very ductile and have excellent magnetic properties such as low hysteresis losses and are excellently suitable to be used for electromagnetic cores. These cores may then be built up of stack of amorphous metal strips. Since the stacking of these strips can be realized more readily as they are thicker, the aim will be to make the thickest possible metal strips while retaining the amorphous structure of the metal.
  • the numeral 1 refers to a quartz crucible for a metal 2.
  • the metal can be melted with the aid of an MF induction coil 3.
  • the crucible changes into a nozzle 4 which is provided with orifices 9.
  • the nozzle 4 can be closed with a valve 5 which is actuated from a unit 6, from which also a particular gas pressure may be applied in the crucible.
  • nozzle 4 Positioned at some adjustable distance from the under side. of the nozzle 4 is the internally water-cooled surface of a chill roll 7 which is driven by some device (not shown) such that it has a spinning speed in the range of 0 to 50 m/s.
  • the strip obtained by using the nozzle 4 has a uniform thickness and width.
  • the comparative experiment demonstrates that the use of 3 rows of jets results in obtaining strip which is considerably thicker than that obtained with a single jet from a slot-shaped orifice. This experiment also shows that with the use of a slotted nozzle said alloy may be formed into amorphous strip having a maximum thickness of about 30 ⁇ m.
  • Example 1 In the manner described in Example 1, use being made of the alloy mentioned in it, strip is made at different spinning speeds. Starting from a value of 30 m/s the spinning speed of the chill surface is decreased in each successive experimental run.
  • Strips obtained using a slotted nozzle, slot dimensions 8x0,6 mm, are-compared with strips obtained using a 7,1 mm wide nozzle having 14 orifices 0,7 mm in diameter arranged in 3 rows of 5,4 and 5 orifices, respectively, which are spaced at a centre-to-centre distance of 1,6 mm.
  • the distance from the centre of the first to that of the third row is 2,6 mm.
  • the orifices of the second row are staggered half a centre-to-centre orifice distance with respect to those of the 1st and 3rd rows. The values found are given in Table 2.
  • the width of the strip obtained using the slotted nozzle was 8,2 mm and that obtained using the multiple-row nozzle 6,3 mm.
  • This experiment also shows that use of a multiple-row nozzle leads to a considerably greater strip thickness than that obtained using a slotted nozzle, irrespective of the spinning speed.
  • the experiment moreover demonstrates that for the alloy used in it the spinning speed must be higher than 20 m/sec in order that the strip may solidify in the amorphous state.
  • the equipment and the alloy used for Experiment 1 are employed for making a wider amorphous strip at different spinning speeds.
  • the nozzle used has 44 orifices of 0,7 mm arranged in 3 rows of 15, 14 and 15 orifices.
  • the distance between the centres of the first and the third rows is 1,6 mm and the width 12 mm.
  • the centre-to-centre distance of the orifices of a row is 0,8 mm.
  • Measured are the strip thickness, strip width and the amplitude of the strip thickness. The values found are given in Table 4.
  • amorphous strip is made from the alloy Fe 72 , 5 Mn 2,0 B 9,0 Si 16,2 CO,3 (at.%).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Soft Magnetic Materials (AREA)
EP83200882A 1982-07-15 1983-06-16 Method of forming continuous strip of amorphous metal Expired EP0099599B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200882T ATE18726T1 (de) 1982-07-15 1983-06-16 Verfahren zur herstellung eines fortlaufenden bandes aus amorphem metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8202856 1982-07-15
NL8202856 1982-07-15

Publications (2)

Publication Number Publication Date
EP0099599A1 EP0099599A1 (en) 1984-02-01
EP0099599B1 true EP0099599B1 (en) 1986-03-26

Family

ID=19840032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200882A Expired EP0099599B1 (en) 1982-07-15 1983-06-16 Method of forming continuous strip of amorphous metal

Country Status (4)

Country Link
EP (1) EP0099599B1 (enrdf_load_stackoverflow)
JP (1) JPS5924556A (enrdf_load_stackoverflow)
AT (1) ATE18726T1 (enrdf_load_stackoverflow)
DE (1) DE3362675D1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620722A1 (de) * 1986-06-20 1988-02-25 Wilfried Dr Hug Giessvorrichtung zur herstellung schnell erstarrender duennwandiger gegenstaende

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2065565B (en) 1979-12-21 1983-07-20 Pilot Ink Co Ltd Ball-point pen tip and ball-point pen provided with same
JPS60108144A (ja) * 1983-11-18 1985-06-13 Nippon Steel Corp 金属薄帯の製造方法
JPS60121049A (ja) * 1983-12-02 1985-06-28 Nippon Steel Corp 金属線材の製造方法
JPS60199553A (ja) * 1984-03-23 1985-10-09 Nippon Steel Corp 金属薄帯の製造方法
JPS63220950A (ja) * 1986-06-28 1988-09-14 Nippon Steel Corp 金属薄帯の製造方法および製造用ノズル
KR0149065B1 (ko) * 1993-08-23 1998-11-16 도끼와 히꼬끼찌 무정형 합금리본 제조방법
US6689234B2 (en) 2000-11-09 2004-02-10 Bechtel Bwxt Idaho, Llc Method of producing metallic materials
US20030183310A1 (en) * 2002-03-29 2003-10-02 Mcrae Michael M. Method of making amorphous metallic sheet
CN104368774A (zh) * 2013-08-12 2015-02-25 江苏宏远新能源科技有限公司 一种多条非晶合金薄带同时喷制生产系统
JP2018167298A (ja) * 2017-03-30 2018-11-01 Ｂｉｚｙｍｅ有限会社 Ｆｅ−Ｓｉ−Ｂ系ナノ結晶合金の製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5448637A (en) * 1977-09-27 1979-04-17 Nippon Steel Corp Method of making amorphous metal sheet
JPS5518582A (en) * 1978-07-26 1980-02-08 Matsushita Electric Ind Co Ltd Manufacture of amorphous metal
US4221257A (en) * 1978-10-10 1980-09-09 Allied Chemical Corporation Continuous casting method for metallic amorphous strips
DE2938709A1 (de) * 1979-09-25 1981-04-02 Vacuumschmelze Gmbh, 6450 Hanau Verfahren und vorrichtung zur herstellung von amorphen metallbaendern
YU96681A (en) * 1980-10-22 1983-12-31 Allegheny Ludlum Steel Device for casting metal bands

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620722A1 (de) * 1986-06-20 1988-02-25 Wilfried Dr Hug Giessvorrichtung zur herstellung schnell erstarrender duennwandiger gegenstaende

Also Published As

Publication number Publication date
DE3362675D1 (en) 1986-04-30
EP0099599A1 (en) 1984-02-01
JPH0478391B2 (enrdf_load_stackoverflow) 1992-12-11
ATE18726T1 (de) 1986-04-15
JPS5924556A (ja) 1984-02-08

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