GB1367687A - Method of hardening the surface of workpieces made of iron and steel - Google Patents

Method of hardening the surface of workpieces made of iron and steel

Info

Publication number
GB1367687A
GB1367687A GB4126471A GB4126471A GB1367687A GB 1367687 A GB1367687 A GB 1367687A GB 4126471 A GB4126471 A GB 4126471A GB 4126471 A GB4126471 A GB 4126471A GB 1367687 A GB1367687 A GB 1367687A
Authority
GB
United Kingdom
Prior art keywords
stage
treatment
nitriding
glow discharge
iron
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
Application number
GB4126471A
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.)
Elektrophysikalische Anstalt Bernhard Berghaus
Original Assignee
Elektrophysikalische Anstalt Bernhard Berghaus
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 Elektrophysikalische Anstalt Bernhard Berghaus filed Critical Elektrophysikalische Anstalt Bernhard Berghaus
Publication of GB1367687A publication Critical patent/GB1367687A/en
Expired 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
    • C23C8/06—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 gases
    • C23C8/36—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 gases using ionised gases, e.g. ionitriding
    • C23C8/38—Treatment of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

1367687 Nitriding by glow discharge ELEKTROPHYSIKALISCHE ANSTALT BERNHARD BERGHAUS 3 Sept 1971 [8 Sept 1970] 41264/71 Heading C7U Iron or steel are surface hardened by glow discharge in an atmosphere of treatment gas, particularly nitrogen or a titanium compound, in at least two stages, treatment of part of the surface being suppressed by shielding during at least one stage, so that a hardening element is diffused to differing depths. As particularly applied to a valve plunger Fig. 1, the body is treated by glow discharge nitriding in a first stage with the regions 3, 4, 5, 6 protected by shields 26, 27, 28, 29 which may be spaced up to 0À5 mm. from the surface, the treatment being effected at above 500‹ C and particularly for 18 hours at 530‹ C. The outer sleeve 26 is then removed and treatment continued for 6 hours at 490‹ C. In a modified second stage the ring 28 shielding region 4 may also be removed, while the inner sleeve 27 may be partially withdrawn to allow nitriding of that part of the inner surface adjacent to the closed end and thereby minimize distortion. Further improvement may also be obtained by shortening the outer sleeve 26 during the first stage.
GB4126471A 1970-09-08 1971-09-03 Method of hardening the surface of workpieces made of iron and steel Expired GB1367687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1336670 1970-09-08

Publications (1)

Publication Number Publication Date
GB1367687A true GB1367687A (en) 1974-09-18

Family

ID=4391800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4126471A Expired GB1367687A (en) 1970-09-08 1971-09-03 Method of hardening the surface of workpieces made of iron and steel

Country Status (10)

Country Link
AT (1) AT320707B (en)
BE (1) BE772299A (en)
CA (1) CA945048A (en)
CH (1) CH545859A (en)
DE (1) DE2144238C3 (en)
FR (1) FR2106363B1 (en)
GB (1) GB1367687A (en)
LU (1) LU63856A1 (en)
NL (1) NL7112384A (en)
SE (1) SE370553B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153488A (en) * 1984-01-23 1985-08-21 Nippon Piston Ring Co Ltd Nitrided steel piston ring
GB2196993A (en) * 1986-10-29 1988-05-11 Electricity Council Method and apparatus for thermochemical treatment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5868878A (en) * 1993-08-27 1999-02-09 Hughes Electronics Corporation Heat treatment by plasma electron heating and solid/gas jet cooling
EP0985739B1 (en) * 1998-09-10 2003-05-14 MMS Marine Motor Service Method of hardening piston crowns and piston crown

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL163085B (en) * 1950-08-03 Siemens Ag SWITCHING DEVICE FOR TRANSMISSION OF MESSAGES ON A TRANSMISSION ROAD CONSISTING OF SEVERAL PARALLEL CONNECTED LINES.
US3536602A (en) * 1967-01-27 1970-10-27 Gen Electric Glow inhibiting method for glow discharge apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153488A (en) * 1984-01-23 1985-08-21 Nippon Piston Ring Co Ltd Nitrided steel piston ring
GB2196993A (en) * 1986-10-29 1988-05-11 Electricity Council Method and apparatus for thermochemical treatment
US4900371A (en) * 1986-10-29 1990-02-13 The Electricity Council Method and apparatus for thermochemical treatment
GB2196993B (en) * 1986-10-29 1991-04-03 Electricity Council Method and apparatus for thermochemical treatment

Also Published As

Publication number Publication date
AT320707B (en) 1975-02-25
DE2144238C3 (en) 1975-09-04
NL7112384A (en) 1972-03-10
FR2106363A1 (en) 1972-05-05
SE370553B (en) 1974-10-21
LU63856A1 (en) 1973-03-09
FR2106363B1 (en) 1974-03-29
BE772299A (en) 1972-03-16
CH545859A (en) 1974-02-15
DE2144238A1 (en) 1972-03-16
DE2144238B2 (en) 1975-01-16
CA945048A (en) 1974-04-09

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees