US2576223A - Method of producing wear resistant steel rails - Google Patents
Method of producing wear resistant steel rails Download PDFInfo
- Publication number
- US2576223A US2576223A US9003A US900348A US2576223A US 2576223 A US2576223 A US 2576223A US 9003 A US9003 A US 9003A US 900348 A US900348 A US 900348A US 2576223 A US2576223 A US 2576223A
- Authority
- US
- United States
- Prior art keywords
- rail
- temperature
- cooling
- wear resistant
- resistant steel
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 title description 9
- 239000010959 steel Substances 0.000 title description 9
- 238000001816 cooling Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- -1 mo ybdenum Chemical compound 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
Definitions
- This invention relates to the manufacture of The invention, therefore, is based on the mainsteel rails having a high degree of wear resistance. tenance of two cooling steps of which the one is Numerous processes have been developed to rapid cooling from the rolling temperature to achieve this important object. Most of these about between 620 to 660 C., and the second is prior art processes are based on a treatment of 5 represented by slow cooling from a critical temthe rails which consists of a succession and a perature to atmospheric temperatures.
- the steel used for the production of the rails pose in view to secure optimum hardening condiin conformity with this invention should contain tions. .35 to 1.0% carbon, 1.3 to 2.0% manganese, and
- the steel may additionally conthe rail is heated to a temperature of over 850 0., tain chromium, mo ybdenum, Vanadium and quenched to a temperature of about 500-700 C. other steel components within customary limits.
- the rail is rolled from a steel containing .55%
- .75% silicon and 1.5% manganese in accordance with a modification of this methcarbon, .75% silicon and 1.5% manganese, in
- the rail is upon leaving the rolls quenched, readdition to normal percentages of sulphur and heated to about 730 c. and finally cooled at a pho phoru Th rail is rolled from the steel at slow rate.
- the method therefore, includes the a temperature of between about 1050 to 1180 C. combination of at least three different tempera- As the rail leaves the rolls it is rapidly cooled ture steps. to a temperature of about 640 C.
- the cooling is S we d by embedding the the rail is, as it comes from the rolls, directly and rail in sand until atmospheric temperature is rapidly cooled to a temperature between 550 to ea hed- 310 0., hereupon annealed at a temperature of What I claim is:
- a method for producing a wear resistant method requires a succession of at least three steel rail compr the tep of ol ing he rail temperature treating steps. from a steel having 0.35 to 1.0 per cent carbon,
- this method is the 5 than before until it reaches atmospheric quick cooling to a temperature below the critical peraturerange and the subdivision of the slow cooling pro-
- this method s l a l comprising the s s f ll n th ra l comprises three distinct temperature treating in a rolling mill m a ee avi 0.35 to 1.0 stages.
- the 0.5 to 1.5 p r c t si st ir n a a t p rarail is heated to a temperature above the thermal e of about 1060 1180 quenching the ra critical range, quenched to a temperature of not directly p its emergence from e rolling l less than 250 C., reheated to below the thermal to a tempe a of about 660 t0 C! herecritical temperature and then slowly cooled to ft r olin the rail a a slower rate than beatmospheric temperatures. Also in this case fore y embedding the Sa e into Sand until it three different temperature treating steps are rereaches atmospheric temperaturequired. .FRI'IZ HOFMANN.
- the invention utilizes the combination of a rapid and a slow cooling step, but it is based on REFERENCES CITED the recognition that the rapid cooling from the 60
- the f I ollowing references are of record in the rooling temperature of the rails must be directly fil of this patent; carried-out in such a manner that a well defined hardening structure results; this aim is achieved UNITED STATES PATENTS by rapidly cooling the rail as it comes from the Number Name Date rolls to a temperature of about between 620 to 1,846,684 Kenney Feb. 23, 1932 660 C. 1 1,943,944 Whyte Jan. 16, 1934 Hereupon the rail is slowly cooled to atmos- 2,101,312 Gerhardt Dec. 7, 1937 pheric temperatures.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
Patented Nov. 27, 1951 UNITED STATES PATENT OFFICE METHOD OF PRODUCING WEAR RESISTANT STEEL RAILS Fritz Hofmann, Linz, Austria No Drawing. Application February 17, 1948, Serial No. 9,003
2 Claims. (01. 148-12.4)
1 2 This invention relates to the manufacture of The invention, therefore, is based on the mainsteel rails having a high degree of wear resistance. tenance of two cooling steps of which the one is Numerous processes have been developed to rapid cooling from the rolling temperature to achieve this important object. Most of these about between 620 to 660 C., and the second is prior art processes are based on a treatment of 5 represented by slow cooling from a critical temthe rails which consists of a succession and a perature to atmospheric temperatures.
variety of heating and cooling steps with the pur- The steel used for the production of the rails pose in view to secure optimum hardening condiin conformity with this invention should contain tions. .35 to 1.0% carbon, 1.3 to 2.0% manganese, and
In conformity with a known process of this type .5 to 1.5% silicon; the steel may additionally conthe rail is heated to a temperature of over 850 0., tain chromium, mo ybdenum, Vanadium and quenched to a temperature of about 500-700 C. other steel components within customary limits.
and then slowly cooled; a reheating step may be The invention will now be described more in introduced between the quenching and the slow detail.
cooling procedure, The rail is rolled from a steel containing .55% In accordance with a modification of this methcarbon, .75% silicon and 1.5% manganese, in
0d the rail is upon leaving the rolls quenched, readdition to normal percentages of sulphur and heated to about 730 c. and finally cooled at a pho phoru Th rail is rolled from the steel at slow rate. The method, therefore, includes the a temperature of between about 1050 to 1180 C. combination of at least three different tempera- As the rail leaves the rolls it is rapidly cooled ture steps. to a temperature of about 640 C. at which point In accordance with another prior art method the cooling is S we d by embedding the the rail is, as it comes from the rolls, directly and rail in sand until atmospheric temperature is rapidly cooled to a temperature between 550 to ea hed- 310 0., hereupon annealed at a temperature of What I claim is:
between 550 to 660 C. and then cooled. Also this 1. A method for producing a wear resistant method requires a succession of at least three steel rail compr the tep of ol ing he rail temperature treating steps. from a steel having 0.35 to 1.0 per cent carbon,
It has also been suggested to cool the rails on 1.3 to 2 per cent manganese and 0.5 to 1.5 per cent the hot bed below the critical temperature range silicon, rest iron at a t p a of about 1050 which is given to be between about 450 to 300 c. o 1l80 0., co lin the rail as it comes from the Hereupon the rail is slowly cooled in a closed vesrolling mill directly and p y until the a sel to about 50 C. and then exposed to air for the reaches a temperature f between 660 to 620 C. final cooling. and hereafter cooling the rail at a slower rate The characterizing feature of this method is the 5 than before until it reaches atmospheric quick cooling to a temperature below the critical peraturerange and the subdivision of the slow cooling pro- A method o producing a ear resistant cedure into separate steps. Also this method s l a l comprising the s s f ll n th ra l comprises three distinct temperature treating in a rolling mill m a ee avi 0.35 to 1.0 stages. per cent carbon, 1.3 to 2 per cent manganese and In conformity with still another method the 0.5 to 1.5 p r c t si st ir n a a t p rarail is heated to a temperature above the thermal e of about 1060 1180 quenching the ra critical range, quenched to a temperature of not directly p its emergence from e rolling l less than 250 C., reheated to below the thermal to a tempe a of about 660 t0 C! herecritical temperature and then slowly cooled to ft r olin the rail a a slower rate than beatmospheric temperatures. Also in this case fore y embedding the Sa e into Sand until it three different temperature treating steps are rereaches atmospheric temperaturequired. .FRI'IZ HOFMANN.
The invention utilizes the combination of a rapid and a slow cooling step, but it is based on REFERENCES CITED the recognition that the rapid cooling from the 60 The f I ollowing references are of record in the rooling temperature of the rails must be directly fil of this patent; carried-out in such a manner that a well defined hardening structure results; this aim is achieved UNITED STATES PATENTS by rapidly cooling the rail as it comes from the Number Name Date rolls to a temperature of about between 620 to 1,846,684 Kenney Feb. 23, 1932 660 C. 1 1,943,944 Whyte Jan. 16, 1934 Hereupon the rail is slowly cooled to atmos- 2,101,312 Gerhardt Dec. 7, 1937 pheric temperatures.
Claims (1)
1. A METHOD FOR PRODUCING A WEAR RESISTANT STEEL RAIL COMPRISING THE STEPS OF ROLLING THE RAIL FROM A STEEL HAVING 0.35 TO 1.0 PER CENT CARBON, 1.3 TO 2 PER CNET MANGANESE AND 0.5 TO 1.5 PER CENT SILICON, REST IRON AT A TEMPERATURE OF ABOUT 1050 TO 1180* C., COOLING THE RAIL AS IT COMES FROM THE ROLLING MILL DIRECTLY AND RAPIDLY UNTIL THE RAIL REACHES A TEMPERATURE OF BETWEEN 660 TO 620* C. AND HEREAFTER COOLING THE RAIL AT A LOWER RATE THAN BEFORE UNTIL IT REACHES ATMOSPHERIC TEMPERATURE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9003A US2576223A (en) | 1948-02-17 | 1948-02-17 | Method of producing wear resistant steel rails |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9003A US2576223A (en) | 1948-02-17 | 1948-02-17 | Method of producing wear resistant steel rails |
Publications (1)
Publication Number | Publication Date |
---|---|
US2576223A true US2576223A (en) | 1951-11-27 |
Family
ID=21735000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US9003A Expired - Lifetime US2576223A (en) | 1948-02-17 | 1948-02-17 | Method of producing wear resistant steel rails |
Country Status (1)
Country | Link |
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US (1) | US2576223A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3207637A (en) * | 1961-12-21 | 1965-09-21 | Matuschka Bernhard | Structural steel and process for making same |
US3519497A (en) * | 1965-04-28 | 1970-07-07 | Lorraine Escaut Sa | Method for the thermal treatment of steel rails |
US4510706A (en) * | 1983-01-08 | 1985-04-16 | Berchem & Schaberg Gmbh | Cutting-tooth anchor for suction dredge and method of making same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1846684A (en) * | 1930-02-05 | 1932-02-23 | Bethlehem Steel Corp | Heat treatment of rails |
US1943944A (en) * | 1931-06-26 | 1934-01-16 | Whyte Samuel | Manufacture of rolled steel products |
US2101312A (en) * | 1931-12-05 | 1937-12-07 | Beth Mary Steel Corp | Process for cooling rails |
-
1948
- 1948-02-17 US US9003A patent/US2576223A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1846684A (en) * | 1930-02-05 | 1932-02-23 | Bethlehem Steel Corp | Heat treatment of rails |
US1943944A (en) * | 1931-06-26 | 1934-01-16 | Whyte Samuel | Manufacture of rolled steel products |
US2101312A (en) * | 1931-12-05 | 1937-12-07 | Beth Mary Steel Corp | Process for cooling rails |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3207637A (en) * | 1961-12-21 | 1965-09-21 | Matuschka Bernhard | Structural steel and process for making same |
US3519497A (en) * | 1965-04-28 | 1970-07-07 | Lorraine Escaut Sa | Method for the thermal treatment of steel rails |
US4510706A (en) * | 1983-01-08 | 1985-04-16 | Berchem & Schaberg Gmbh | Cutting-tooth anchor for suction dredge and method of making same |
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