WO1979001054A1 - Chill casting of metal strip employing a molybdenum chill surface - Google Patents

Chill casting of metal strip employing a molybdenum chill surface Download PDF

Info

Publication number
WO1979001054A1
WO1979001054A1 PCT/US1979/000303 US7900303W WO7901054A1 WO 1979001054 A1 WO1979001054 A1 WO 1979001054A1 US 7900303 W US7900303 W US 7900303W WO 7901054 A1 WO7901054 A1 WO 7901054A1
Authority
WO
WIPO (PCT)
Prior art keywords
chill
molybdenum
molten metal
chill body
strip
Prior art date
Application number
PCT/US1979/000303
Other languages
English (en)
French (fr)
Inventor
R Ray
Original Assignee
Allied Chem
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26696754&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1979001054(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Allied Chem filed Critical Allied Chem
Priority to DE7979900571T priority Critical patent/DE2965347D1/de
Publication of WO1979001054A1 publication Critical patent/WO1979001054A1/en

Links

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
    • 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
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire

Definitions

  • the chill body may be a rotating wheel or cylinder, and the molten metal may be impinged onto the flat peripheral surface of the wheel or onto the inner surface of the cylinder.
  • the chill body may also be a traveling belt, usually an endless belt. The metal may be impinged onto the surface of the chill body by methods such as jetting the molten metal onto the surface.
  • High heat conductivity metals previously proposed to serve as chill body surface such as copper, aluminum, beryllium copper or silver, do not have the desired wear characteristics.
  • the present invention further provides an improvement in the apparatus for making metal strip directly from the melt by impinging molten metal onto the flat surface of a rapidly moving chill body, which apparatus includes a chill body having a flat surface adapted to receive molten metal to be impinged thereon for rapid quenching together with means functionally connected with said chill body for impinging molten metal onto its surface, wherein the improvement comprises providing a chill body having a surface of molybdenum.
  • the molybdenum chill surface is readily wetted by the molten metal - especially by iron, nickel or cobalt-based alloys which upon rapid quenching from the melt form amorphous structures.
  • the molybdenum surface further provides for good adhesion of the solidified metal strip, which is essential to effect thorough quenching of the metal if a ductile, amorphous metal strip is desired, yet it also affords clean release of the solidified strip from the surface.
  • the molybdenum surface has excellent wear-resistant properties as compared to chill surfaces previously, used in the melt-spin process wherein molten metal is impinged onto the chill surface.
  • the molybdenum has adequate heat conductivity to permit sufficiently rapid quenching, at rates in excess of 10 4 or 10 5 degrees centigrade per second, of thin layers of molten metal (in the order of a few thousands inch thickness), as is required for formation of amorphous metal strip.
  • chill bodies having a molybdenum surface in the process of making flat metal strip directly from the melt by impinging the molten metal onto the rapidly moving flat surface of a chill body are obtained regardless of the configuration of the chill body.
  • the chill body may be a rapidly rotating drum having a flat exterior surface which serves as the chill surface; it may be a rapidly rotating cylinder whereof the flat inner surface furnishes the chill surface, a moving belt or an other suitable structure which provides a flat surface.
  • a flat strip is a slender body whose transverse dimensions are less than its length, and whose thickness is much less than its width, typically having a width at least about ten times its thickness, and having smooth and even top and bottom surfaces which are generally parallel to each other.
  • a flat chill body surface is an endless surface provided by an endless belt, or the exterior or interior surface of a drum or cylinder, and which is smooth and even and which is straight in transverse direction, upon which a flat strip, as above-defined, may be cast.
  • Fig. 1 is a cross-sectional view of an annular chill roll, the exterior surface of which is provided with a layer of molybdenum metal, to provide a casting surface of molybdenum.
  • Fig. 2 is a cross-sectional view of an annular chill roll having, a ring of molybdenum inserted in its surface.
  • Fig. 3 is a cross-sectional view of a cylindrical chill body having an inner molybdenum-clad chill surface inclined with respect to the axis of rotation.
  • Fig. 4 is a side view in partial cross section showing means for jetting molten metal onto a rotating chill roll and a rotating chill roll provided with a chill surface of molybdenum metal.
  • Fig. 5 is a somewhat simplified perspective view of apparatus including means for depositing molten metal onto a chill surface in the form of a moving endless belt having a surface of molybdenum.
  • Chill casting processes for making flat metal strip - polycrystalline as well as amorphous (glassy) metal strip - by impinging molten metal onto the flat surface of a rapidly moving chill surface of a heat extracting member (chill body) are well known. It has now been found that for use in such chill casting processes molybdenum has a desirable combination of properties required of a good chill surface, namely high melting point (2650oC); relatively low coefficient of thermal expansion (lower than that of copper); moderately high thermal conductivity (about 35% of that of copper); and moderately high hardness.
  • molybdenum has the required wetting properties for the molten metal and release properties for the solidified strip which, in combination with the aforementioned properties, make it eminently suitable for use as chill surface in quench casting of amorphous metal strips, especially ductile amorphous metal strips.
  • Most significant is the ability of molybdenum chill surfaces to resist erosion and wear by the impinging stream of molten metal, whether the casting takes place under vacuum or in a gaseous atmosphere, which may be air or a protective atmosphere such as nitrogen, helium and the like. This is in contrast to the presently employed copper chill surfaces.
  • refractory metals e.g., molybdenum, tungsten, chromium, hafnium, iridium, niobium, osmium, platinum, rhenium, rhodium, ruthenium, tantalum, thorium, vanadium, and zirconium.
  • refractory metals e.g., molybdenum, tungsten, chromium, hafnium, iridium, niobium, osmium, platinum, rhenium, rhodium, ruthenium, tantalum, thorium, vanadium, and zirconium.
  • use of a chill surface of molybdenum is particularly advantageous when casting under vacuum (say under absolutepressure of less than about 1 in. Hg.), or when casting glass-forming alloys containing one or more refractory metals, and especially when casting such alloys under vacuum.
  • the form of the chill body and the mode of the casting operation are not critical for purposes of the present invention, so long as a flat casting surface is provided.
  • casting may take place against the peripheral surface of a rapidly rotating drum by jetting molten metal against that surface, as disclosed in the above-mentioned patents to Bedell et al. and Kavesh.
  • the molten metal may be deposited under pressure from a slotted nozzle onto the flat chill surface, as described in U.S.P. 4,142,571 to Narasimhan.
  • the chill surface may be furnished by the interior surface of a rotating cylinder, as described in U.S.P. 3,881,540 to Kavesh and U.S.P.
  • the chill surface of molybdenum may, in accordance with the present invention, be provided by fabricating the chill body of molybdenum, or by merely providing a surface layer of molybdenum on a chill body constructed of other material, suitably material having high thermal conductivity, such as copper or silver.
  • Chill bodies made of molybdenum may be fabricated employing methods usually employed for fabrication of molybdenum, including machining from solid stock, such as cast pieces, or fabrication by known powder metallurgical methods.
  • a particularly desirable embodiment of the present invention is a composite chill body, especially a chill roll, made of copper provided with a hoop of molybdenum, as illustrated in Figs. 1 and 2. With reference to Fig.
  • chill roll 1 made of copper is mounted for rotation on shaft 2.
  • the flat exterior surface of chill roll 1 is provided with a hoop of molybdenum 3.
  • the hoop of molybdenum covers the total peripheral surface of the chill roll.
  • a narrower hoop of molybdenum 3 is provided covering only part of the peripheral surface of the chill roll.
  • the molybdenum hoop may be affixed to the copper chill roll, e.g. by shrink fitting.
  • a molybdenum surface may be provided by any other conventional surface coating method, as for example oxyacetylene spraying, a method which involves feeding a molybdenum wire into the cone of an oxygen/acetylene flame to melt the metal, and then propelling the molten metal in droplet form against the surface to be coated.
  • oxyacetylene spraying a method which involves feeding a molybdenum wire into the cone of an oxygen/acetylene flame to melt the metal, and then propelling the molten metal in droplet form against the surface to be coated.
  • suitable methods include plasma arc spraying and conventional cladding procedures.
  • Example 1 The following example further illustrates the present invention and sets forth the best mode presently contemplated for its practice.
  • Example 1
  • Fig. 4 employing a chill roll of construction as shown in
  • the chill roll had an outer diameter of 8 inches, and its quench surface was 0.5 inches wide. It was rotated at a speed of about 2000 rpm.
  • the apparatus was enclosed in a vacuum chamber. All tests were conducted under vacuum of about 100 mm. Concurrent experiments employing a chill roll made of copper having an outer diameter of 8 inches and a width of 1 inch rotated at 2000 rpm, were conducted, also under vacuum of about 100 mm.
  • a number of different glass forming alloys alloys which upon rapid quenching from the melt, at a rate in excess of about 10 4 to 10 5 °C/sec. form an amorphous solid structure (see, e.g. U.S.P.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
PCT/US1979/000303 1978-05-11 1979-05-04 Chill casting of metal strip employing a molybdenum chill surface WO1979001054A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE7979900571T DE2965347D1 (en) 1978-05-11 1979-05-04 Chill casting of metal strip employing a molybdenum chill surface

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US90494578A 1978-05-11 1978-05-11
US2311979A 1979-03-23 1979-03-23
US23119 1979-03-23

Publications (1)

Publication Number Publication Date
WO1979001054A1 true WO1979001054A1 (en) 1979-12-13

Family

ID=26696754

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1979/000303 WO1979001054A1 (en) 1978-05-11 1979-05-04 Chill casting of metal strip employing a molybdenum chill surface

Country Status (5)

Country Link
EP (1) EP0016006B1 (enrdf_load_stackoverflow)
JP (1) JPH029900B2 (enrdf_load_stackoverflow)
CA (1) CA1151389A (enrdf_load_stackoverflow)
DE (1) DE2965347D1 (enrdf_load_stackoverflow)
WO (1) WO1979001054A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589471A (en) * 1984-10-29 1986-05-20 General Electric Company Method for rapid solidification of titanium alloys by melt extraction
US4842186A (en) * 1987-10-30 1989-06-27 The Babock & Wilcox Company Method and apparatus for building a workpiece by deposit welding
AT16355U1 (de) * 2017-06-30 2019-07-15 Plansee Se Schleuderring

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801540A (en) * 1961-10-30 1974-04-02 Geigy Ag J R Dialkylhydroxyphenylalkanoic acid esters of di-and tripentaerythritol useful as polymer antioxidants
US3896203A (en) * 1973-04-23 1975-07-22 Battelle Development Corp Centrifugal method of forming filaments from an unconfined source of molten material
DE2719710A1 (de) * 1976-05-04 1977-11-24 Allied Chem Verfahren zum giessen kontinuierlicher faeden mit abschreckwalze und vorrichtung zur durchfuehrung des verfahrens
US4077462A (en) * 1976-06-30 1978-03-07 Allied Chemical Corporation Chill roll casting of continuous filament
US4124664A (en) * 1976-11-30 1978-11-07 Battelle Development Corporation Formation of filaments directly from an unconfined source of molten material
US4142571A (en) * 1976-10-22 1979-03-06 Allied Chemical Corporation Continuous casting method for metallic strips

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881540A (en) * 1973-10-29 1975-05-06 Allied Chem Method of forming metallic filament cast on interior surface of inclined annular quench roll
AU503857B2 (en) * 1976-10-22 1979-09-20 Allied Chemical Corp. Continuous casting of metal strip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801540A (en) * 1961-10-30 1974-04-02 Geigy Ag J R Dialkylhydroxyphenylalkanoic acid esters of di-and tripentaerythritol useful as polymer antioxidants
US3896203A (en) * 1973-04-23 1975-07-22 Battelle Development Corp Centrifugal method of forming filaments from an unconfined source of molten material
DE2719710A1 (de) * 1976-05-04 1977-11-24 Allied Chem Verfahren zum giessen kontinuierlicher faeden mit abschreckwalze und vorrichtung zur durchfuehrung des verfahrens
US4077462A (en) * 1976-06-30 1978-03-07 Allied Chemical Corporation Chill roll casting of continuous filament
US4142571A (en) * 1976-10-22 1979-03-06 Allied Chemical Corporation Continuous casting method for metallic strips
US4124664A (en) * 1976-11-30 1978-11-07 Battelle Development Corporation Formation of filaments directly from an unconfined source of molten material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0016006A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589471A (en) * 1984-10-29 1986-05-20 General Electric Company Method for rapid solidification of titanium alloys by melt extraction
US4842186A (en) * 1987-10-30 1989-06-27 The Babock & Wilcox Company Method and apparatus for building a workpiece by deposit welding
AT16355U1 (de) * 2017-06-30 2019-07-15 Plansee Se Schleuderring
US11065685B2 (en) 2017-06-30 2021-07-20 Plansee Se Slinger ring

Also Published As

Publication number Publication date
JPH029900B2 (enrdf_load_stackoverflow) 1990-03-05
DE2965347D1 (en) 1983-06-16
CA1151389A (en) 1983-08-09
JPS55500295A (enrdf_load_stackoverflow) 1980-05-15
EP0016006A4 (en) 1980-09-29
EP0016006A1 (en) 1980-10-01
EP0016006B1 (en) 1983-05-11

Similar Documents

Publication Publication Date Title
US4830084A (en) Spray casting of articles
CA1069348A (en) Spray casting of gas atomized molten metal to produce high density ingots
JPS6046846A (ja) 結晶質金属の連続ストリツプ製造方法
GB1592257A (en) Apparatus for making continuously cast metallic strip
EP0024506B1 (en) Apparatus and method for chill casting of metal strip employing a chromium chill surface
JPS5928429B2 (ja) 非晶質金属連続フイラメントの製造方法および装置
US3776295A (en) Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification
EP0016006B1 (en) Chill casting of metal strip employing a molybdenum chill surface
US3709722A (en) Process for accreting molten copper on a moving core member
US4184532A (en) Chill roll casting of continuous filament
EP0099599A1 (en) Method of forming continuous strip of amorphous metal
Katuya et al. Production of Ni-Si-B amorphous alloy wires by melt extraction and their thermal and mechanical properties
US5097586A (en) Spray-forming method of forming metal sheet
US4660622A (en) Method for the making of microcrystalline metallic materials
JPH09271909A (ja) 急冷金属薄帯製造用冷却基板
US3940976A (en) Method of determining the suitability of continuously cast slabs of Al- or Al-Si-killed soft steel for producing cold rolled sheets to be tinned
JP2928965B2 (ja) 超耐熱・難加工材の噴射成形方法
EP1307603B1 (en) Composition for elements having a high strength, in particular for hot wear and thermal fatigue, rolls coated with said composition
JP3622437B2 (ja) 連続鋳造用鋳型およびそれを用いた連続鋳造方法
JP2786566B2 (ja) 溶融亜鉛メッキ装置用筒状体の製造方法
JP2006255733A (ja) 連続鋳造用鋳型銅板
JP3022277B2 (ja) ベルトホイール式連続鋳造機用注湯ノズル
JPS6234817B2 (enrdf_load_stackoverflow)
JP2001087841A (ja) 表面品質に優れた薄肉鋳片の連続鋳造方法
JPH05247582A (ja) 圧延用ロールおよびその製造方法

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): JP

AL Designated countries for regional patents

Designated state(s): CH DE FR GB