CH389331A - Rolling elements and process for their manufacture - Google Patents
Rolling elements and process for their manufactureInfo
- Publication number
- CH389331A CH389331A CH7865559A CH7865559A CH389331A CH 389331 A CH389331 A CH 389331A CH 7865559 A CH7865559 A CH 7865559A CH 7865559 A CH7865559 A CH 7865559A CH 389331 A CH389331 A CH 389331A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- alloy
- dependent
- mon
- workpiece made
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/32—Balls
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Rolling Contact Bearings (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Description
Wälzkörper und Verfahren zu seiner Herstellung Wälzkörper für Wälzlager, das heisst Kugeln, Rollen und Nadeln, werden derzeit hauptsächlich aus sogenanntem Kugellagerstahl hergestellt, der zwar hohe Festigkeiten aufweist, aber nicht rostbeständig ist. Zur Herstellung sogenannter rostfreier Wälzkör- per verwendet man einen Stahl, dessen Chromgehalt über demjenigen des Kugellagerstahls liegt, wodurch zwar eine geringere Rostanfälligkeit, nicht aber Rost freiheit erreicht wird.
Ein weiterer Nachteil dieser gegen Rost weniger anfälligen Wälzkörper ist der, dass sie sich nicht für den Einbau in Lager eignen, die bei hoher Temperatur, also z. B. bei einer Tem peratur von 200 C, arbeiten. Noch weniger rost anfällig, sogar bei höherer Temperatur, sind Wälz- körper aus sogenanntem 18/8 Cr/Ni-Stahl, jedoch ist die Festigkeit solcher Wälzkörper geringer als die jenige von Kugellagerstahl.
Der Wälzkörper nach der vorliegenden Erfindung weist nun keinen dieser Nachteile auf. Er ist absolut korrosionsbeständig und weist nach einer entspre chenden Wärmebehandlung auch die nötige Festig keit auf. Er ist dadurch gekennzeichnet, dass er aus einer Legierung besteht, die folgende Komponenten enthält:
EMI0001.0012
10-20 <SEP> % <SEP> Cr
<tb> 3-15 <SEP> % <SEP> Fe
<tb> 16-27 <SEP> % <SEP> Ni einen die Ausscheidungshärtung bewirkenden Bestandteil
EMI0001.0013
0,5 <SEP> - <SEP> 1 <SEP> % <SEP> Mn
<tb> 0,2 <SEP> - <SEP> 1 <SEP> % <SEP> Si
<tb> 0,01- <SEP> <B>0,1%</B> <SEP> C
<tb> 50 <SEP> -40% <SEP> Co Zu diesen Bestandteilen können noch bis zu 5 Mo sowie bis zu 5 % W hinzugefügt werden.
Als die Ausscheidungshärtung bewirkender Be standteil kommen in erster Linie in Frage
EMI0001.0015
Unter einem entsprechenden Mindestgemisch ist also eines zu verstehen, bei welchem für jeden fehlenden Be-Anteil der doppelte Ti-Anteil vorhanden ist.
Das Verfahren zu dieser Herstellung ist dadurch gekennzeichnet, dass man ein Werkstück aus einer solchen Legierung bei einer Temperatur von 1000 bis 1200 C glüht, im Wasser abschreckt, derart kalt verformt, dass eine Querschnittverminderung von mindestens<B>10%</B> eintritt, und während 30 Minuten bis 10 Stunden einer Wärmebehandlung im Tempe raturbereich zwischen 350 und 600 C unterwirft.
Es können z. B. Lagerrollen dadurch hergestellt werden, dass man eine Stange mit einem Durch messer von 6 mm aus einer Legierung mit
EMI0001.0019
18 <SEP> % <SEP> Cr <SEP> <B>0,3%</B> <SEP> Be
<tb> 5 <SEP> % <SEP> Fe <SEP> 1 <SEP> % <SEP> Ti
<tb> 21% <SEP> Ni <SEP> 1 <SEP> % <SEP> Mn
<tb> 4 <SEP> % <SEP> Mo <SEP> <B>0,6%</B> <SEP> Si
<tb> 4 <SEP> % <SEP> W <SEP> 0,03 <SEP> % <SEP> C
<tb> Rest <SEP> Co über eine Stunde bei 1100 C glüht, im Wasser ab schreckt, durch Herunterwalzen auf einen Durch messer von 3 mm kaltverformt, so dass eine Quer schnittsverminderung von<B>75%</B> erhalten wird, aus diesem Stab Rollen der gewünschten Länge abschnei det, diese während 4 Stunden bei 480 C glüht, sie auf das Endmass schleif und poliert. Kugeln für Kugellager lassen sich z.
B. aus einer Legierung mit
EMI0002.0001
12 <SEP> % <SEP> Cr <SEP> <B>0,15%</B> <SEP> Be
<tb> <B>10%</B> <SEP> Fe <SEP> 1 <SEP> % <SEP> Ti
<tb> <B>27%</B> <SEP> Ni <SEP> 1 <SEP> % <SEP> Mn
<tb> 4 <SEP> % <SEP> Mo <SEP> <B><I>0,5%</I></B> <SEP> Si
<tb> 4%W <SEP> 0,03 <SEP> % <SEP> C
<tb> Rest <SEP> Co herstellen, indem man einen 3 mm dicken Draht aus einem solchen Material über eine Stunde bei 1150 C im Durchlaufofen glüht, im Wasser ab schreckt, auf 1,5 mm Durchmesser herunterzieht, in Teile von 1,5 mm Länge schneidet, diese zu Kügel chen presst, sie dann während einer halben Stunde bei 550 glüht, schleift und poliert.
Infolge des Gehaltes an Beryllium und/oder Titan lassen sich Härten von über 700 kg/mm2 Vickers erreichen, die mit den üblichen rostfreien Legierungen für Wälzkörper nicht erreicht werden können.
Rolling bodies and method for their production Rolling bodies for roller bearings, that is to say balls, rollers and needles, are currently mainly made of so-called ball bearing steel, which has high strengths but is not rust-resistant. To produce so-called rust-free rolling elements, a steel is used whose chromium content is higher than that of ball bearing steel, which means that it is less susceptible to rust, but not rust-free.
Another disadvantage of these rolling elements, which are less susceptible to rust, is that they are not suitable for installation in bearings that are exposed to high temperatures, e.g. B. at a temperature of 200 C, work. Rolling elements made of so-called 18/8 Cr / Ni steel are even less susceptible to rust, even at higher temperatures, but the strength of such rolling elements is lower than that of ball bearing steel.
The rolling element according to the present invention does not have any of these disadvantages. It is absolutely corrosion-resistant and, after appropriate heat treatment, also has the necessary strength. It is characterized by the fact that it is made of an alloy that contains the following components:
EMI0001.0012
10-20 <SEP>% <SEP> Cr
<tb> 3-15 <SEP>% <SEP> Fe
<tb> 16-27 <SEP>% <SEP> Ni is a component which causes precipitation hardening
EMI0001.0013
0.5 <SEP> - <SEP> 1 <SEP>% <SEP> Mn
<tb> 0.2 <SEP> - <SEP> 1 <SEP>% <SEP> Si
<tb> 0.01- <SEP> <B> 0.1% </B> <SEP> C
<tb> 50 <SEP> -40% <SEP> Co Up to 5 Mo and up to 5% W can be added to these components.
As the precipitation hardening constituent Be come primarily into question
EMI0001.0015
A corresponding minimum mixture is therefore to be understood as one in which double the Ti content is present for each missing Be content.
The method for this production is characterized in that a workpiece made of such an alloy is annealed at a temperature of 1000 to 1200 C, quenched in water, and cold-formed in such a way that a cross-section reduction of at least 10% occurs , and subjected to a heat treatment in the temperature range between 350 and 600 C for 30 minutes to 10 hours.
It can e.g. B. bearing rollers are made by having a rod with a diameter of 6 mm made of an alloy
EMI0001.0019
18 <SEP>% <SEP> Cr <SEP> <B> 0.3% </B> <SEP> Be
<tb> 5 <SEP>% <SEP> Fe <SEP> 1 <SEP>% <SEP> Ti
<tb> 21% <SEP> Ni <SEP> 1 <SEP>% <SEP> Mn
<tb> 4 <SEP>% <SEP> Mon <SEP> <B> 0.6% </B> <SEP> Si
<tb> 4 <SEP>% <SEP> W <SEP> 0.03 <SEP>% <SEP> C
<tb> The rest of <SEP> Co anneals for one hour at 1100 C, quenched in water, cold-formed by rolling down to a diameter of 3 mm, so that a cross-section reduction of <B> 75% </B> is obtained, Cut off rolls of the desired length from this rod, anneal them for 4 hours at 480 C, grind them to their final dimensions and polish them. Balls for ball bearings can be z.
B. from an alloy with
EMI0002.0001
12 <SEP>% <SEP> Cr <SEP> <B> 0.15% </B> <SEP> Be
<tb> <B> 10% </B> <SEP> Fe <SEP> 1 <SEP>% <SEP> Ti
<tb> <B> 27% </B> <SEP> Ni <SEP> 1 <SEP>% <SEP> Mn
<tb> 4 <SEP>% <SEP> Mon <SEP> <B><I>0,5%</I> </B> <SEP> Si
<tb> 4% W <SEP> 0.03 <SEP>% <SEP> C
<tb> Make the rest of <SEP> Co by annealing a 3 mm thick wire made of such a material for one hour at 1150 C in a continuous furnace, quenching in water, pulling it down to 1.5 mm diameter, in parts of 1.5 mm in length, press them into small balls, then anneal, grind and polish them for half an hour at 550.
As a result of the beryllium and / or titanium content, hardnesses of over 700 kg / mm2 Vickers can be achieved, which cannot be achieved with the usual rustproof alloys for rolling elements.
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH7865559A CH389331A (en) | 1959-09-25 | 1959-09-25 | Rolling elements and process for their manufacture |
DEI18751A DE1207091B (en) | 1959-09-25 | 1960-09-22 | Corrosion-resistant rolling element made of a cobalt-nickel-chromium alloy and process for its production |
GB32708/60A GB891318A (en) | 1959-09-25 | 1960-09-23 | Improvements in balls or rollers for anti-friction bearings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH7865559A CH389331A (en) | 1959-09-25 | 1959-09-25 | Rolling elements and process for their manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
CH389331A true CH389331A (en) | 1965-03-15 |
Family
ID=4536625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH7865559A CH389331A (en) | 1959-09-25 | 1959-09-25 | Rolling elements and process for their manufacture |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH389331A (en) |
DE (1) | DE1207091B (en) |
GB (1) | GB891318A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2405720A1 (en) * | 1974-02-06 | 1975-08-07 | Kozo Sato | Cylindrical roller bearing has hollow rollers - which contain lubricating substance for gradual usage |
EP0378986A1 (en) * | 1989-01-20 | 1990-07-25 | BÖHLER Gesellschaft m.b.H. | Bearing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5952228B2 (en) * | 1980-07-09 | 1984-12-18 | 株式会社日立製作所 | Sliding structure for nuclear reactor |
US9109623B2 (en) * | 2013-04-29 | 2015-08-18 | Roller-Bearing Company of America, Inc. | Integrated cartridge double-row ball bearing for a nuclear reactor control rod drive mechanism |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH286927A (en) * | 1946-07-11 | 1952-11-15 | Company Elgin National Watch | Cobalt-chromium-nickel alloy. |
AT200805B (en) * | 1956-01-28 | 1958-11-25 | Straumann Inst Ag | Process for the production of non-magnetic and rustproof bearing parts in the form of pointed journals and shafts for point bearings in apparatus and instruments of all kinds |
-
1959
- 1959-09-25 CH CH7865559A patent/CH389331A/en unknown
-
1960
- 1960-09-22 DE DEI18751A patent/DE1207091B/en active Pending
- 1960-09-23 GB GB32708/60A patent/GB891318A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2405720A1 (en) * | 1974-02-06 | 1975-08-07 | Kozo Sato | Cylindrical roller bearing has hollow rollers - which contain lubricating substance for gradual usage |
EP0378986A1 (en) * | 1989-01-20 | 1990-07-25 | BÖHLER Gesellschaft m.b.H. | Bearing |
Also Published As
Publication number | Publication date |
---|---|
GB891318A (en) | 1962-03-14 |
DE1207091B (en) | 1965-12-16 |
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