US812178A - Melt or bath for hardening steel. - Google Patents

Melt or bath for hardening steel. Download PDF

Info

Publication number
US812178A
US812178A US25314105A US1905253141A US812178A US 812178 A US812178 A US 812178A US 25314105 A US25314105 A US 25314105A US 1905253141 A US1905253141 A US 1905253141A US 812178 A US812178 A US 812178A
Authority
US
United States
Prior art keywords
melt
bath
hardening steel
lead
chlorid
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
US25314105A
Inventor
Shipley N Brayshaw
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US25314105A priority Critical patent/US812178A/en
Application granted granted Critical
Publication of US812178A publication Critical patent/US812178A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
    • C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
    • C23C8/64—Carburising
    • C23C8/66—Carburising of ferrous surfaces

Definitions

  • My invention consists, essentially, in formmg-a melt or bath for hardening steel of sodium chlorid (NaCl) and potassium chlorid.
  • KCL Potassic ferrocyanid
  • K Fe(CN) tb which may be added a small proportion of potassic ferrocyanid
  • the melt or bath is maintained fused when in use by the continuous application of heat from gas-jets or other flame.
  • the quantity or proportion of the potassium chlorid may be varied-acccording to the temperature required. The higher the temperature required the less of the potassium salt is required.
  • the arti cles sink in without being forced down. It does not form dross on the surface. It is more fluid and circulates more freely than lead. It is more gentle in its heating action than lead. It remains as a glaze over the surface of the article when removed from the melt and keeps the article hot until it is ac As soon as.
  • a conspicuous advantage over potasslc cyanid is that the melt may he made carburizing by the addition of potassic ferrocyanid K Fe (CNL, or other suitable carburizing agent to any extent desired, or the melt ma be left perfectly neutrali. 45., with no ten ency .to.
  • a melt or bath for hardening tools or articles of steel comprising a fusible compound of sodium chlorid (NaCl), and potassium chlorid (KCl) substantially as described.
  • a melt or bath for hardening tools or articles of steel comprising a compound bf several salts soluble in water, any one of which separately melts at a higher temperature. than the compound and a carburizmg agentsubstantially as described.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

-*n'nrrn sra'rns SHLPLEY N. BRAYSHAW, OF HULME, MANCHESTER, ENGLAND earner. oirrron.
TO GEORGE NASH, OF YORK, N. Y.
MELT OR BATH FOR HARDENENG STEEL.
Specification of Letters Patent.
Application filed March 51,1905. slain No. 253.141.
Patented Feb. 13, 1906.
1 bring them u to the desired temperature,
lead or lead al y being more commonly employed. I find that much better results may be obtained by employing a salt which is soluble in water and which is fusible at about 700 centigrade, and While sodium chlorid and potassium chlorid each separately melt at a much higher temperature than that I find that by mixing them in suitable'proportions they will melt at any desired tempera ture between 680 and 770 centigrade. My invention consists, essentially, in formmg-a melt or bath for hardening steel of sodium chlorid (NaCl) and potassium chlorid.
(KCL) tb which may be added a small proportion of potassic ferrocyanid K Fe(CN) In carrying out the invention I mix to-' gether in the desired proportions crystalline or ground sodium chlorid and potassium chlorid. This is placed in a melt-pot and gradually heated until fused in a gas or other irnace. I
The melt or bath is maintained fused when in use by the continuous application of heat from gas-jets or other flame.
The quantity or proportion of the potassium chlorid may be varied-acccording to the temperature required. The higher the temperature required the less of the potassium salt is required.
I find that in use this melt or bath will- It 1s much lighter The salt is non-poisonous.
It is much than lead and easier to handle.
cheaper than lead bulk for bulk. The arti cles sink in without being forced down. It does not form dross on the surface. It is more fluid and circulates more freely than lead. It is more gentle in its heating action than lead. It remains as a glaze over the surface of the article when removed from the melt and keeps the article hot until it is ac As soon as.
tually immersed in the water. the articles are immersed in water the Whole of the salt is removed instantly, as the salt does not adhere to the teeth or other parts of the articles as does lead.
A conspicuous advantage over potasslc cyanid is that the melt may he made carburizing by the addition of potassic ferrocyanid K Fe (CNL, or other suitable carburizing agent to any extent desired, or the melt ma be left perfectly neutrali. 45., with no ten ency .to.
carburize or to oxidize. What I claim as my invention, and desire to protect by Letters atent isl. A melt or bath for hardening tools or articles of steel comprising a fusible compound of sodium chlorid (NaCl), and potassium chlorid (KCl) substantially as described.
2.. A melt or bath for hardening tools or articles of steel comprising a compound bf several salts soluble in water, any one of which separately melts at a higher temperature. than the compound and a carburizmg agentsubstantially as described.
In Witness whereof I have hereunto slgned my name in the presence of two subscribing witnesses. v
SHIPLEY N. BRAYSl-IAVV.
Vvitnesses:
' I. OWDEN OBRIEN,
B. TABHAM WOODHEAD.
have the following advantages over leadz assrcnon
US25314105A 1905-03-31 1905-03-31 Melt or bath for hardening steel. Expired - Lifetime US812178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US25314105A US812178A (en) 1905-03-31 1905-03-31 Melt or bath for hardening steel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25314105A US812178A (en) 1905-03-31 1905-03-31 Melt or bath for hardening steel.

Publications (1)

Publication Number Publication Date
US812178A true US812178A (en) 1906-02-13

Family

ID=2880657

Family Applications (1)

Application Number Title Priority Date Filing Date
US25314105A Expired - Lifetime US812178A (en) 1905-03-31 1905-03-31 Melt or bath for hardening steel.

Country Status (1)

Country Link
US (1) US812178A (en)

Similar Documents

Publication Publication Date Title
US2569097A (en) Method of coating ferrous metal with aluminum or an aluminum alloy
GB1034270A (en) Case-hardening processes
US812178A (en) Melt or bath for hardening steel.
US1085768A (en) Process of preventing oxidation of metals during annealing.
US3184330A (en) Diffusion process
JP2022000540A (en) Carburization method of steel part and manufacturing method of steel part
US1804454A (en) Process for hardening articles made of iron or steel
US1799945A (en) Process for heat treatment of metal articles
US1307853A (en) Assigwob
US1784570A (en) Coating metal articles
US2755542A (en) Method of providing brazed ferrous metal parts with aluminum coating
US2413928A (en) Heat treatment for magnesium alloys
SU392169A1 (en) METHOD OF OBTAINING HEAT-RESISTANT COATINGS ON HEAT-RESISTANT ALLOYS
US1555400A (en) Heat treating of metal
US1520744A (en) Bath for heat-treating metals
US3475230A (en) Descaling process and material
US1937629A (en) Black finishing metal articles
US158790A (en) Improvement in tin lining metallic pipes
GB190412816A (en) Improved Melt or Bath for Hardening Steel.
US748842A (en) Case-hardening compound
SU377338A1 (en) ENVIRONMENT FOR HEATING OF METALS AND ALLOYS
US2575427A (en) Treatment of metalworking tools
US1096006A (en) Process of treating iron and steel.
US611922A (en) Thomas midgley and lewis fink
US1552042A (en) Process of making protected metal