JPS57188612A - Additive for boron-treating steel - Google Patents

Additive for boron-treating steel

Info

Publication number
JPS57188612A
JPS57188612A JP7339681A JP7339681A JPS57188612A JP S57188612 A JPS57188612 A JP S57188612A JP 7339681 A JP7339681 A JP 7339681A JP 7339681 A JP7339681 A JP 7339681A JP S57188612 A JPS57188612 A JP S57188612A
Authority
JP
Japan
Prior art keywords
boron
block
additive
amount
improved
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.)
Granted
Application number
JP7339681A
Other languages
Japanese (ja)
Other versions
JPS6159370B2 (en
Inventor
Tsuneji Yamada
Masaaki Matsuura
Fumio Tajiri
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP7339681A priority Critical patent/JPS57188612A/en
Publication of JPS57188612A publication Critical patent/JPS57188612A/en
Publication of JPS6159370B2 publication Critical patent/JPS6159370B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To obtain an additive for boron-treating steel which has improved quenching characteristics by mixing a specific amount of powdery boron alloy iron consisting of B, C, Si, Al, and Fe at a specific ratio into an Al block. CONSTITUTION:Boron alloy iron powder which consists of 19-23% B, <=0.1% C, <=2.0% Si, <=12% Al, and Fe as a remaining component and has an about 5- 30mm. grain size is mixed nearly uniformly at a 0.2-0.3 blending ratio into an Al block 2 formed in an adequate shape, and the block 2 is fitted to the plunger 4 of an adding device 3. This is dipped in molten steel charged in a foundary ladle 5 and, while moved up and down and left and right, is held for about 20- 40sec before being lifted. Consequently, the yield of added boron is improved and variation in the added amount of boron is decreased, obtaining stably the adequate amount of boron effective to improve quenching characteristics.
JP7339681A 1981-05-18 1981-05-18 Additive for boron-treating steel Granted JPS57188612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7339681A JPS57188612A (en) 1981-05-18 1981-05-18 Additive for boron-treating steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7339681A JPS57188612A (en) 1981-05-18 1981-05-18 Additive for boron-treating steel

Publications (2)

Publication Number Publication Date
JPS57188612A true JPS57188612A (en) 1982-11-19
JPS6159370B2 JPS6159370B2 (en) 1986-12-16

Family

ID=13516991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7339681A Granted JPS57188612A (en) 1981-05-18 1981-05-18 Additive for boron-treating steel

Country Status (1)

Country Link
JP (1) JPS57188612A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6294672U (en) * 1985-12-03 1987-06-17

Also Published As

Publication number Publication date
JPS6159370B2 (en) 1986-12-16

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