US2857301A - Method of surface-hardening steel, and a quenching medium therefor - Google Patents

Method of surface-hardening steel, and a quenching medium therefor Download PDF

Info

Publication number
US2857301A
US2857301A US567088A US56708856A US2857301A US 2857301 A US2857301 A US 2857301A US 567088 A US567088 A US 567088A US 56708856 A US56708856 A US 56708856A US 2857301 A US2857301 A US 2857301A
Authority
US
United States
Prior art keywords
steel
quenching medium
brine solution
tall oil
hardening
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
Application number
US567088A
Inventor
Harry L Mauzy
Rosenberg Edgar L Von
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.)
Reed Roller Bit Co
Original Assignee
Reed Roller Bit Co
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 Reed Roller Bit Co filed Critical Reed Roller Bit Co
Priority to US567088A priority Critical patent/US2857301A/en
Application granted granted Critical
Publication of US2857301A publication Critical patent/US2857301A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents

Definitions

  • An object of this invention is to provide a new and improved method and a quenching medium for treating steel, and particularly high carbon steel, to produce a surface thereon which is uniformly hardened to a high hardness value.
  • An important object of this invention is to provide a new and improved method for quenching steel, and particularly high carbon steel, wherein a non-ionic, substantially non-foaming wetting agent such as Sterox CD, a polyoxyethylene ester of tall oil, is utilized in a brine solution for obtaining a uniformly hardened surface on the steel.
  • a non-ionic, substantially non-foaming wetting agent such as Sterox CD, a polyoxyethylene ester of tall oil
  • the method of this invention involves the treatment of steel, and particularly high carbon steel having at least about 0.80% carbon. Generally such steel will have at least about 0.20% manganese also.
  • steel articles made of that type of steel having such high carbon content the prior methods of hardening the surfaces thereof have often resulted in spotty areas of insuflicient hardness which has resulted in the rejection or reprocessing of the steel articles so treated.
  • the steel, or the articles made therefrom, having the high carbon content is initially heated above the upper critical temperature of the particular steel being treated. With a steel having about 0.80% carbon and about 0.20% manganese, it is heated to a temperature in the neighborhood of 1400 F. and 1500 F. When the steel is thus heated above its critical temperature, it is then given a drastic quench. In order to obtain a uniform hardening of the surface of such steel, the quenching medium of this invention is employed in carrying out this method.
  • Such quenching medium is a brine solution, preferably having about 710% NaCl by weight in water to which has been added a non-ionic, substantially non-foaming wetting agent such as a polyoxyethylene ester of tall oil sold by Monsanto Chemical Company under the trademark Sterox CD.
  • a non-ionic, substantially non-foaming wetting agent such as a polyoxyethylene ester of tall oil sold by Monsanto Chemical Company under the trademark Sterox CD.
  • the brine solution could have about 9% NaCl by weight in water and the polyoxyethylene ester of tall oil is preferably added in an amount which is above about 0.05% by weight, or more specifically, about 0.1% by weight. From a practical standpoint, the Sterox CD would not be added in amounts above about 0.25% by weight.
  • the surface of the steel is uniformly hardened to a high hardness value in the range of about -65 Rockwell C. None of the areas of insuflicient hardness such as were described above in connection with the prior art are encountered when using the method of this invention. Also, this method requires less time to obtain the same surface hardness of the steel, as compared to the prior known methods.
  • a method of treating high carbon steel to obtain uniform hardening of the surface thereof comprising initially heating said steel above its upper critical temperature, and thereafter quenching the heated steel in a brine solution containing a non-ionic, substantially non-forming wetting agent consisting of a polyoxyethylene ester of tall oil.
  • said brine solution includes 7-10% by weight of NaCl in water and whereinsaid wetting agent is a polyoxyethylene ester of tall oil which is present in the brine solution in an amount above about 0.5% by weight.
  • said brine solution includes 7-10% by weight of NaCl in water and wherein said wetting agent is a polyoxyethylene ester of tall oil which is present in the brine solution in the amount of about 0.1% by weight.
  • a quenching medium for use in the hardening of high carbon steel comprising a brine solution having therewith an effective amount of a polyoxyethylene ester of tall oil.
  • a quenching medium for use in the hardening of high carbon steel comprising a brine solution having about 7-10% NaCl and having therewith an amount of a polyoxyethylene ester of tall oil above about 0.05 by weight.
  • a quenching medium for use in the hardening of high carbon steel comprising a brine solution having about 710% NaCl and having therewith about 0.1% of a polyoxyethylene ester of tall oil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

United States Patent METHOD OF SURFACE-HARDENING STEEL, AND A QUENCHING MEDIUM THEREFOR Harry L. Mauzy, Houston, Tex., and Edgar L. Von Rosenberg, Oklahoma City, Okla., assignors to Reed Roller Bit Company, Houston, Tex., a corporation of Texas No Drawing. Application February 23, 1956 Serial No. 567,088
6 Claims. (Cl. 148-18) This invention relates to new and useful improvements in methods of surface-hardening steel, and a quenching medium therefor.
An object of this invention is to provide a new and improved method and a quenching medium for treating steel, and particularly high carbon steel, to produce a surface thereon which is uniformly hardened to a high hardness value.
An important object of this invention is to provide a new and improved method for quenching steel, and particularly high carbon steel, wherein a non-ionic, substantially non-foaming wetting agent such as Sterox CD, a polyoxyethylene ester of tall oil, is utilized in a brine solution for obtaining a uniformly hardened surface on the steel.
Other objects of this invention will become evident from the following description of the invention and from the claims appended hereto.
The method of this invention involves the treatment of steel, and particularly high carbon steel having at least about 0.80% carbon. Generally such steel will have at least about 0.20% manganese also. In any event, with steel articles made of that type of steel having such high carbon content, the prior methods of hardening the surfaces thereof have often resulted in spotty areas of insuflicient hardness which has resulted in the rejection or reprocessing of the steel articles so treated.
In the method of this invention, the steel, or the articles made therefrom, having the high carbon content is initially heated above the upper critical temperature of the particular steel being treated. With a steel having about 0.80% carbon and about 0.20% manganese, it is heated to a temperature in the neighborhood of 1400 F. and 1500 F. When the steel is thus heated above its critical temperature, it is then given a drastic quench. In order to obtain a uniform hardening of the surface of such steel, the quenching medium of this invention is employed in carrying out this method. Such quenching medium is a brine solution, preferably having about 710% NaCl by weight in water to which has been added a non-ionic, substantially non-foaming wetting agent such as a polyoxyethylene ester of tall oil sold by Monsanto Chemical Company under the trademark Sterox CD. As a specific 2,857,301 Patented Oct. 21, 1958 example, the brine solution could have about 9% NaCl by weight in water and the polyoxyethylene ester of tall oil is preferably added in an amount which is above about 0.05% by weight, or more specifically, about 0.1% by weight. From a practical standpoint, the Sterox CD would not be added in amounts above about 0.25% by weight. i
With the use of the above-described quenching medium in carrying out the method of this invention, the surface of the steel is uniformly hardened to a high hardness value in the range of about -65 Rockwell C. None of the areas of insuflicient hardness such as were described above in connection with the prior art are encountered when using the method of this invention. Also, this method requires less time to obtain the same surface hardness of the steel, as compared to the prior known methods.
The foregoing disclosure and description of the invention is illustrative and explanatory thereof and various changes may be made within the scope of the appended claims without departing from the spirit of the invention.
What is claimed is:
l. A method of treating high carbon steel to obtain uniform hardening of the surface thereof, comprising initially heating said steel above its upper critical temperature, and thereafter quenching the heated steel in a brine solution containing a non-ionic, substantially non-forming wetting agent consisting of a polyoxyethylene ester of tall oil.
2. The method set forth in claim 1, wherein said brine solution includes 7-10% by weight of NaCl in water and whereinsaid wetting agent is a polyoxyethylene ester of tall oil which is present in the brine solution in an amount above about 0.5% by weight.
3. The method set forth in claim 1, wherein said brine solution includes 7-10% by weight of NaCl in water and wherein said wetting agent is a polyoxyethylene ester of tall oil which is present in the brine solution in the amount of about 0.1% by weight.
4. A quenching medium for use in the hardening of high carbon steel, comprising a brine solution having therewith an effective amount of a polyoxyethylene ester of tall oil.
5. A quenching medium for use in the hardening of high carbon steel, comprising a brine solution having about 7-10% NaCl and having therewith an amount of a polyoxyethylene ester of tall oil above about 0.05 by weight.
6. A quenching medium for use in the hardening of high carbon steel, comprising a brine solution having about 710% NaCl and having therewith about 0.1% of a polyoxyethylene ester of tall oil.
References Cited in the file of this patent FOREIGN PATENTS 479,069 Canada Dec. 4, 1951

Claims (1)

1. A METHOD OF TREATING HIGH CARBON STEEL TO OBTAIN UNIFORM HARDENING OF THE SURFACE THEREOF, COMPRISING INITIALLY HEATING SAID STEEL ABOVE ITS UPPER CRITICAL TEMPERATURE, AND THEREAFTER QUENCHING THE HEATED STEEL IN A BRINE SOLUTION CONTAINING A NON-IONIC, SUBSTANTIALLY NON-FORMING WETTING AGENT CONSISTING OF A POLYOXYETHYLENE ESTER OF TALL OIL.
US567088A 1956-02-23 1956-02-23 Method of surface-hardening steel, and a quenching medium therefor Expired - Lifetime US2857301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US567088A US2857301A (en) 1956-02-23 1956-02-23 Method of surface-hardening steel, and a quenching medium therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US567088A US2857301A (en) 1956-02-23 1956-02-23 Method of surface-hardening steel, and a quenching medium therefor

Publications (1)

Publication Number Publication Date
US2857301A true US2857301A (en) 1958-10-21

Family

ID=24265659

Family Applications (1)

Application Number Title Priority Date Filing Date
US567088A Expired - Lifetime US2857301A (en) 1956-02-23 1956-02-23 Method of surface-hardening steel, and a quenching medium therefor

Country Status (1)

Country Link
US (1) US2857301A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072506A (en) * 1957-04-13 1963-01-08 Houghton Chemie G M B H Quenching and cutting oil composition
US3793208A (en) * 1973-01-04 1974-02-19 Park Chem Co Method of rectifying commercial salt baths
US4231812A (en) * 1978-03-14 1980-11-04 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Surface treatment of metal strip
US4243439A (en) * 1976-10-19 1981-01-06 Societe De Vente De L'aluminium Pechiney Process of quenching metal pieces and product produced
US4431466A (en) * 1981-03-16 1984-02-14 Melampy Donald F Method for making armor plate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA479069A (en) * 1951-12-04 Aluminum Company Of America Quenching metal articles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA479069A (en) * 1951-12-04 Aluminum Company Of America Quenching metal articles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072506A (en) * 1957-04-13 1963-01-08 Houghton Chemie G M B H Quenching and cutting oil composition
US3793208A (en) * 1973-01-04 1974-02-19 Park Chem Co Method of rectifying commercial salt baths
US4243439A (en) * 1976-10-19 1981-01-06 Societe De Vente De L'aluminium Pechiney Process of quenching metal pieces and product produced
US4231812A (en) * 1978-03-14 1980-11-04 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Surface treatment of metal strip
US4431466A (en) * 1981-03-16 1984-02-14 Melampy Donald F Method for making armor plate

Similar Documents

Publication Publication Date Title
US2801216A (en) Treatment of water with dialdehyde bactericides
ES377176A1 (en) Heat treatment for alloys particularly steels to be used in sour well service
NO821498L (en) PROCEDURE FOR PREPARING BEETS.
US3022205A (en) Method of quenching and quenching liquid
US2857301A (en) Method of surface-hardening steel, and a quenching medium therefor
US2643204A (en) Nitric acid pickling
US2921877A (en) Process of chromizing air hardening tool steel
US2313754A (en) Method of protecting magnesium and its alloys from corrosion
Christian et al. The bainite transformation
US1961520A (en) Method of case hardening steel
US3039843A (en) Corrosion inhibited wood treating solution
US2312066A (en) Method of coloring stainless steel
US2563672A (en) Machinability of quench-hardened alloy steels containing retained austenite
US3161598A (en) Method and composition for chemical rust removal
US2215950A (en) Chemical process
US1852194A (en) Method of cleaning and pickling metals
US2390264A (en) Soil correctives
US1736920A (en) Case hardening
JPS5729570A (en) Surface treating method
US1685630A (en) Process of curing meats
US1975058A (en) Process for hardening metals
US1304946A (en) Chaeles dear
US2010562A (en) Pickling restrainer and the manufacture thereof
US2305652A (en) Method of treating organic compounds
US1881721A (en) Inhibitor and the use thereof