JPS5743959A - Polished special strip steel - Google Patents

Polished special strip steel

Info

Publication number
JPS5743959A
JPS5743959A JP11866580A JP11866580A JPS5743959A JP S5743959 A JPS5743959 A JP S5743959A JP 11866580 A JP11866580 A JP 11866580A JP 11866580 A JP11866580 A JP 11866580A JP S5743959 A JPS5743959 A JP S5743959A
Authority
JP
Japan
Prior art keywords
carburization
hardness
upper limit
low
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.)
Pending
Application number
JP11866580A
Other languages
Japanese (ja)
Inventor
Masayoshi Takano
Noriyuki Kono
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co Ltd
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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP11866580A priority Critical patent/JPS5743959A/en
Publication of JPS5743959A publication Critical patent/JPS5743959A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To obtain a steel product which is excellent in deep drawing property as well as high in hardness of a core part thereof and short in a time required in carburization treatment and low in irregularity of carburization effect by a method wherein Si is adjusted and a content of C is made low and Cr and Mn are added. CONSTITUTION:Said steel comprises, in the % basis, above 0.20-0.60 C, 0.15 or less Si, 0.20-2.0 Mn, 0.05-2.0 Cr, 0.60 or less Mo and the remainder of Fe and inevitable impurities. Herein, C is necessary in order to insure hardness of a core part free from carburization but the upper limit thereof is determined from saturation of toughness, deep drawing property and hardening hardness. A content of Si is pref. made low from a standpont of processing property but, when made extremely low from a standpoint of deacidification, because a cost of said steel is increased, the upper limit thereof is defined. Mn enhances hardenability to a large extent and is effective in increasing surface hardness and carburization depth when carburization is carried out but the upper limit thereof is determined from a standpoint of press moldability. Cr enhances hardenability and preferable in press moldability under an annealing condition and hardenability thereafter but, when it is used in a large amount, toughness is lowered.
JP11866580A 1980-08-28 1980-08-28 Polished special strip steel Pending JPS5743959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11866580A JPS5743959A (en) 1980-08-28 1980-08-28 Polished special strip steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11866580A JPS5743959A (en) 1980-08-28 1980-08-28 Polished special strip steel

Publications (1)

Publication Number Publication Date
JPS5743959A true JPS5743959A (en) 1982-03-12

Family

ID=14742178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11866580A Pending JPS5743959A (en) 1980-08-28 1980-08-28 Polished special strip steel

Country Status (1)

Country Link
JP (1) JPS5743959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770261A (en) * 1980-10-18 1982-04-30 Sumitomo Metal Ind Ltd Boronic case hardening steel with reduced carburized abnormal layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770261A (en) * 1980-10-18 1982-04-30 Sumitomo Metal Ind Ltd Boronic case hardening steel with reduced carburized abnormal layer

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