CA1191497A - Wearing surface for a crusher and a method for manufacturing the same - Google Patents
Wearing surface for a crusher and a method for manufacturing the sameInfo
- Publication number
- CA1191497A CA1191497A CA000345943A CA345943A CA1191497A CA 1191497 A CA1191497 A CA 1191497A CA 000345943 A CA000345943 A CA 000345943A CA 345943 A CA345943 A CA 345943A CA 1191497 A CA1191497 A CA 1191497A
- Authority
- CA
- Canada
- Prior art keywords
- iron
- cast
- wearing
- crusher
- white cast
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/10—Shape or construction of jaws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Forging (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Soft steel forming a machinable mating surface and martensitic white cast-iron forming a wearing surface are hot welded together and then the mating surface is machined to the support surface of a crusher.
Soft steel forming a machinable mating surface and martensitic white cast-iron forming a wearing surface are hot welded together and then the mating surface is machined to the support surface of a crusher.
Description
f~
OUTOKUMPU Oy, Ou-tokumpu Wearing surface for a crusher and a method for manufacturing th same The present invention relates to a wear- and shock-resistant ~earing component intended to be attached to the backing surface in a crusher and having a machined fitting surface, ~nd to a method for manufacturing -the same, and this invention relates in particular to a method for manufacturing jAW
plates and crusher coatings.
T~e replaceable wearing components in jaw crushers include the coating plates of the fixed jaw and the ;swinging jaw, as well as the plates protec-ting the sides of the chamber. The wearing components in gyratory crushers ,include the respective coatings of the moving crushing cone and the fixed crushing bowl.
The material which has been used as coating material in crusners is a hard manganese steel which contains carbon approx. 1.2 %
by weight and manganese approx. 14 % by weight and has a Brine~ Hardness Number of approx.200 after casting and heat treatment. Hard manganese steel is also characterized in that it is tough and shock-resistant and that its backing surfaces can be machined after casting. However, such manganese cast-steel is not resistant to abrasive wear.
Furthermore, coating components made from so-called martensi~ic ~hite cast-iron have been used in smal] jaw crushers (Delonge, ~.A., Abrasion-resistant alloy reduces milling costs, Engineering Mining Journal 147 (1946):10, 60-62). Such martensitic white cast-iron usually contains carbon 2.9-3.9 ~, silL~on 0.5-1.0 % by weight, man~anese 0.4-1.2 % by weight, chromium 1.5-3.0 %, nickel 2.5-4.75 ~ by weight, and possibly also molybdenum, copper and vanadium. Such martensitic white cast-iron is highly resistant to abrasion and is also resistant ~o shocks, provided -that it is not subjected -to bending stress.
The proper-ties of martensi-tic white cast-iron, i.e. so-called Ni--hard, have been described in the publication of International ~ickel Co.: Engineering Properties and Applications of Ni-hard, ~ulletin, New York 1954.
The use of white martensitic cast-iron ior wearing components subjected to shocks and especially for t:he wearing components vf crushers has been prevented by the fact that such cas-t-iron cannot be machined to the precision required by the backing su~faces. The machining problems result in that wearing components made from martensitic white cast-iron do not fit ti~htly against the backing surfaces at all points, and so, when ~h~y are sub~ected to shocks in crushers, they bend and break easi~Ly. I~ the publication Vuoriteollisuus, issue 1 (1960) 1-39, the ~roperties of martensitic white cast-iron are compared with t~se of various steels. It is noted in this publication that martensitic white cast-iron can be used advantageously as coating material in mills. In mills the coating material is not, however, subjected to bending stresses o~E the same magnitude as in crushers. Nevertheless, it is also polnted out in this publiLcation that problems have been encountered in the dry millin~ machine of a vanadium factory owi.ng to -the brittleness of martensitic white cast-iron but that the wear was minimal compared with that of hard manganese stee!l. The great wear of the latter was due to the fac-t that -the coating was smooth and that the milling load slid along the coating.
It can be seen from the above that hard ~ n~se steel has been used for the manufacture of the wearing componen-ts of crushers because after casting its backing surfaces can be machined but its poor resistance to ab:rasive wear constitutes a disadvantage. It can also be seen from the above -that martensi-tic white cas-t-iron would be a more advantageous ~a~erial than hard manganese steel for the wearing components of crushers because it is highly resistant -to abrasive wear and also to shocks, provided it :is not subjected to bending s~resC3es. However, in order to preven~ a crusher wearing c~mponent made from martensitic whi-te cast-iron from being s~jected to bending stresses it must be possible to machine this component to the precision required by the backing surface. This has proved -to be very di:Eficult since a casting ~ade from martensi-tic white cast-iron .is very hard, its Brinell ~ardness ~umber is approx. 500-600.
~he object of the present invention is -therefore to elimina-te the above problems and to provide a crusher wearing component the fi-tting surface of which can be machined to -the precision r~uired by the backing surfaces, the wearing surface of the c~ponent heing as resistant to abrasive wear as is martensitic ~it~ cast-iron.
~'he ~ear- and shock-resistant wearing component according to the invention, intended to be attached to the backing surface of a crusher and having a machined fi-tting surface, is c~ar~cterized in that the fitting surface is of sof-t steel whic~ ~an be machined and the wearing surface is of martensitic white cast iron.
The crusher woaring cornponen-t according to -the presen-t invention is manufactured by attaching the soft steel constituting the machinable fitting surface and -the martensitic white cast-iron COnStitUtillg the wearing surface to each other by hot welding and by machining the fittiny surface to the shape of the backing surface. The hot welding of the machinable fitting surface and the wearing surface to each other can be achieved by casting the mar-tensitic whi-te cast-iron onto a possibly 4 ~ 7 pre-heated soft-s-teel plate, depressions or spigots having possibly been formecd on one side of the soft steel plate beEore the casting of the martensitic white cast-iron on the said side.
Alternatively, the martensitic white cast-iron can be cast first, whereafter soft steel is cast onto the still hot ~earing surface of martensltic white cast-irorl, and the soft steel is finally machined to form the fitting surface.
Alternatively, perforations can be made in a soft steel pla-te, and through these perforations a wearing surface made from martensitic white cast-iron is attached to the soft steel plate by welding.
It is evident that the expression "soft steel" in this conte~t denotes in general any steel which can be machined to the precision required by the backing surfaces in the crusher and which, without deforming, is resistant to the stresses it is subjected to in the crusher.
OUTOKUMPU Oy, Ou-tokumpu Wearing surface for a crusher and a method for manufacturing th same The present invention relates to a wear- and shock-resistant ~earing component intended to be attached to the backing surface in a crusher and having a machined fitting surface, ~nd to a method for manufacturing -the same, and this invention relates in particular to a method for manufacturing jAW
plates and crusher coatings.
T~e replaceable wearing components in jaw crushers include the coating plates of the fixed jaw and the ;swinging jaw, as well as the plates protec-ting the sides of the chamber. The wearing components in gyratory crushers ,include the respective coatings of the moving crushing cone and the fixed crushing bowl.
The material which has been used as coating material in crusners is a hard manganese steel which contains carbon approx. 1.2 %
by weight and manganese approx. 14 % by weight and has a Brine~ Hardness Number of approx.200 after casting and heat treatment. Hard manganese steel is also characterized in that it is tough and shock-resistant and that its backing surfaces can be machined after casting. However, such manganese cast-steel is not resistant to abrasive wear.
Furthermore, coating components made from so-called martensi~ic ~hite cast-iron have been used in smal] jaw crushers (Delonge, ~.A., Abrasion-resistant alloy reduces milling costs, Engineering Mining Journal 147 (1946):10, 60-62). Such martensitic white cast-iron usually contains carbon 2.9-3.9 ~, silL~on 0.5-1.0 % by weight, man~anese 0.4-1.2 % by weight, chromium 1.5-3.0 %, nickel 2.5-4.75 ~ by weight, and possibly also molybdenum, copper and vanadium. Such martensitic white cast-iron is highly resistant to abrasion and is also resistant ~o shocks, provided -that it is not subjected -to bending stress.
The proper-ties of martensi-tic white cast-iron, i.e. so-called Ni--hard, have been described in the publication of International ~ickel Co.: Engineering Properties and Applications of Ni-hard, ~ulletin, New York 1954.
The use of white martensitic cast-iron ior wearing components subjected to shocks and especially for t:he wearing components vf crushers has been prevented by the fact that such cas-t-iron cannot be machined to the precision required by the backing su~faces. The machining problems result in that wearing components made from martensitic white cast-iron do not fit ti~htly against the backing surfaces at all points, and so, when ~h~y are sub~ected to shocks in crushers, they bend and break easi~Ly. I~ the publication Vuoriteollisuus, issue 1 (1960) 1-39, the ~roperties of martensitic white cast-iron are compared with t~se of various steels. It is noted in this publication that martensitic white cast-iron can be used advantageously as coating material in mills. In mills the coating material is not, however, subjected to bending stresses o~E the same magnitude as in crushers. Nevertheless, it is also polnted out in this publiLcation that problems have been encountered in the dry millin~ machine of a vanadium factory owi.ng to -the brittleness of martensitic white cast-iron but that the wear was minimal compared with that of hard manganese stee!l. The great wear of the latter was due to the fac-t that -the coating was smooth and that the milling load slid along the coating.
It can be seen from the above that hard ~ n~se steel has been used for the manufacture of the wearing componen-ts of crushers because after casting its backing surfaces can be machined but its poor resistance to ab:rasive wear constitutes a disadvantage. It can also be seen from the above -that martensi-tic white cas-t-iron would be a more advantageous ~a~erial than hard manganese steel for the wearing components of crushers because it is highly resistant -to abrasive wear and also to shocks, provided it :is not subjected to bending s~resC3es. However, in order to preven~ a crusher wearing c~mponent made from martensitic whi-te cast-iron from being s~jected to bending stresses it must be possible to machine this component to the precision required by the backing surface. This has proved -to be very di:Eficult since a casting ~ade from martensi-tic white cast-iron .is very hard, its Brinell ~ardness ~umber is approx. 500-600.
~he object of the present invention is -therefore to elimina-te the above problems and to provide a crusher wearing component the fi-tting surface of which can be machined to -the precision r~uired by the backing surfaces, the wearing surface of the c~ponent heing as resistant to abrasive wear as is martensitic ~it~ cast-iron.
~'he ~ear- and shock-resistant wearing component according to the invention, intended to be attached to the backing surface of a crusher and having a machined fi-tting surface, is c~ar~cterized in that the fitting surface is of sof-t steel whic~ ~an be machined and the wearing surface is of martensitic white cast iron.
The crusher woaring cornponen-t according to -the presen-t invention is manufactured by attaching the soft steel constituting the machinable fitting surface and -the martensitic white cast-iron COnStitUtillg the wearing surface to each other by hot welding and by machining the fittiny surface to the shape of the backing surface. The hot welding of the machinable fitting surface and the wearing surface to each other can be achieved by casting the mar-tensitic whi-te cast-iron onto a possibly 4 ~ 7 pre-heated soft-s-teel plate, depressions or spigots having possibly been formecd on one side of the soft steel plate beEore the casting of the martensitic white cast-iron on the said side.
Alternatively, the martensitic white cast-iron can be cast first, whereafter soft steel is cast onto the still hot ~earing surface of martensltic white cast-irorl, and the soft steel is finally machined to form the fitting surface.
Alternatively, perforations can be made in a soft steel pla-te, and through these perforations a wearing surface made from martensitic white cast-iron is attached to the soft steel plate by welding.
It is evident that the expression "soft steel" in this conte~t denotes in general any steel which can be machined to the precision required by the backing surfaces in the crusher and which, without deforming, is resistant to the stresses it is subjected to in the crusher.
Claims (6)
- WHAT IS CLAIMED IS:
l. A wear- and shock-resistant wearing component adapted to be attached to a support surface in a crusher, comprising a machined mating surface of soft steel and a wearing surface of martensitic white cast-iron. - 2. A method for manufacturing a wear- and shock-resistant wearing component adapted to be attached to a support surface in a crusher, comprising attaching to each other a soft steel forming a machinable mating surface and a martensitic white cast-iron forming a wearing surface by hot welding and machining the mating surface to the shape of the support surface.
- 3. The method of Claim 2, in which the martensitic white cast-iron is cast onto a soft steel plate, which has been pre-heated.
- 4. The method of Claim 3, in which depressions or spigots or both are formed on one side of the soft, steel plate before the casting of the martensitic white cast-iron on said one side.
- 5. The method of Claim 2, in which the wearing surface is first cast from martensitic white cast-iron and, before it has cooled, soft steel is cast onto it to form the machinable mating surface.
- 6. The method of Claim 2, in which perforations are made in the soft steel plate, and the wearing surface made from martens-itic white cast-iron is attached to the soft steel plate through these perforations by welding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI790678 | 1979-02-28 | ||
| FI790678A FI60410C (en) | 1979-02-28 | 1979-02-28 | SLITPARTI FOER KROSS OCH FOERFARANDE FOER FRAMSTAELLNING DAERAV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1191497A true CA1191497A (en) | 1985-08-06 |
Family
ID=8512438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000345943A Expired CA1191497A (en) | 1979-02-28 | 1980-02-19 | Wearing surface for a crusher and a method for manufacturing the same |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS55132647A (en) |
| CA (1) | CA1191497A (en) |
| DE (1) | DE3007594A1 (en) |
| ES (1) | ES8106841A1 (en) |
| FI (1) | FI60410C (en) |
| GB (1) | GB2044646B (en) |
| MX (1) | MX154359A (en) |
| NO (1) | NO160591C (en) |
| SE (1) | SE8001566L (en) |
| ZA (1) | ZA801035B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE431723B (en) * | 1980-06-23 | 1984-02-27 | Sandvik Ab | WELDABLE Wear Part with High Durability |
| US4635701A (en) * | 1983-07-05 | 1987-01-13 | Vida-Weld Pty. Limited | Composite metal articles |
| CN101850491B (en) * | 2010-04-13 | 2012-07-04 | 文山通用机械制造有限责任公司 | Manufacture process of machine body of large jaw crusher |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE677570C (en) * | 1938-07-13 | 1939-06-28 | Fried Krupp Grusonwerk Akt Ges | Process for the production of Brechbachken |
| JPS5365223A (en) * | 1976-11-24 | 1978-06-10 | Kobe Steel Ltd | Preparation of jaw plate |
-
1979
- 1979-02-28 FI FI790678A patent/FI60410C/en not_active IP Right Cessation
-
1980
- 1980-02-19 CA CA000345943A patent/CA1191497A/en not_active Expired
- 1980-02-20 GB GB8005798A patent/GB2044646B/en not_active Expired
- 1980-02-20 MX MX181250A patent/MX154359A/en unknown
- 1980-02-22 ZA ZA00801035A patent/ZA801035B/en unknown
- 1980-02-26 ES ES488964A patent/ES8106841A1/en not_active Expired
- 1980-02-27 JP JP2286780A patent/JPS55132647A/en active Pending
- 1980-02-28 DE DE19803007594 patent/DE3007594A1/en not_active Ceased
- 1980-02-28 NO NO800577A patent/NO160591C/en unknown
- 1980-02-28 SE SE8001566A patent/SE8001566L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2044646B (en) | 1983-08-17 |
| FI60410B (en) | 1981-09-30 |
| FI790678A (en) | 1980-08-29 |
| NO160591C (en) | 1989-05-03 |
| DE3007594A1 (en) | 1980-09-04 |
| ZA801035B (en) | 1981-03-25 |
| ES488964A0 (en) | 1981-09-01 |
| ES8106841A1 (en) | 1981-09-01 |
| JPS55132647A (en) | 1980-10-15 |
| GB2044646A (en) | 1980-10-22 |
| FI60410C (en) | 1982-01-11 |
| NO800577L (en) | 1980-08-29 |
| MX154359A (en) | 1987-07-24 |
| SE8001566L (en) | 1980-08-29 |
| NO160591B (en) | 1989-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |