JPS5891125A - Production of rolling roll - Google Patents

Production of rolling roll

Info

Publication number
JPS5891125A
JPS5891125A JP18919381A JP18919381A JPS5891125A JP S5891125 A JPS5891125 A JP S5891125A JP 18919381 A JP18919381 A JP 18919381A JP 18919381 A JP18919381 A JP 18919381A JP S5891125 A JPS5891125 A JP S5891125A
Authority
JP
Japan
Prior art keywords
roll
depth
hardened layer
rolling roll
progressive
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
JP18919381A
Other languages
Japanese (ja)
Inventor
Nobuishi Okada
岡田　亘石
Kimihiko Akahori
赤堀　公彦
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18919381A priority Critical patent/JPS5891125A/en
Publication of JPS5891125A publication Critical patent/JPS5891125A/en
Pending 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies

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)

Abstract

PURPOSE:To produce a rolling roll of extremely large depth of a quench hardened layer by subjecting a roll material contg. specific ratios of Mn and Cr to progressive heating and progressive hardening in a low frequency induction furnace then to a sub-zero treatment. CONSTITUTION:A roll material contg. 0.7-1.5wt% Mn and 4-5wt% Cr is subjected to progressive hardening after progressive heating in a low frequency induction furnace. Thereafter, said material is subjected to a sub-zero treatment. Thus, a rolling roll having the depth of the quench hardened layer much larger than that of the conventional rolls, for example, the roll of which the depth of the hardened layer having about >=90 Hs Shore hardness is as high as about 40mm. is obtained.

Description

【発明の詳細な説明】 本発明は、圧延ロールの製造法に係り、特に冷間圧延用
ワークロールに好適な鍛鋼ロールの製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a rolling roll, and particularly to a method for manufacturing a forged steel roll suitable for a work roll for cold rolling.

冷間圧延用ワークロールの熱処理法として、低周波誘導
炉により漸進加熱後、漸進水焼入れし、次いでサブゼロ
処理する方法は知られている。たとえば、特開昭５２−
７．４５２２号公報参照。As a heat treatment method for cold rolling work rolls, a method is known in which progressive heating is performed in a low frequency induction furnace, followed by gradual water quenching, followed by subzero treatment. For example, JP-A-52-
See Publication No. 7.4522.

かかる熱処理法は、焼入れ硬化層の深いロールを得るの
に好適であり、前述の公開公報ではショア硬さＨ８９０
以上を有する硬化層深さが２２＋ｍ＋に達す・るものが
得られている。Such a heat treatment method is suitable for obtaining a roll with a deep quench hardening layer, and the above-mentioned publication discloses a roll with a Shore hardness of H890.
A hardened layer having a depth of 22+m+ has been obtained.

本発明の目的は、前述の公開公報に記載されているもの
よりも更に大きい焼入れ硬化層深さを有するロールの製
造法を提供するにある。It is an object of the present invention to provide a method for manufacturing rolls having a greater depth of quench hardening than that described in the above-mentioned publications.

本発明は、マンガン０．７〜１．５重量係、クロム４〜
５重量％を含有するロール材に対して、前述の熱処理法
を施すものである。The present invention has a weight ratio of 0.7 to 1.5 for manganese and 4 to 1.5 for chromium.
The above heat treatment method is applied to a roll material containing 5% by weight.

前述の熱処理法によって得られる硬化層深さはロール材
の成分組成によって異なることがわかった。前述の熱処
理法の効果が最大限に発揮されるロール材は、マンガン
０．７〜１．５重量係とクロム４〜５重量％を含有する
ものであることを見出した。It was found that the depth of the hardened layer obtained by the above heat treatment method differs depending on the component composition of the roll material. It has been found that the roll material that exhibits the maximum effect of the heat treatment method described above contains 0.7 to 1.5% by weight of manganese and 4 to 5% by weight of chromium.

本発明によれば、−例としてショア硬さＨａ９０以上を
有する硬化層深さが４０１ｍに達するものが得られる。According to the invention, it is possible to obtain, for example, a case having a hardness of Shore hardness Ha of 90 or more and a hardened layer depth of up to 401 m.

実施例 エレクトロスラグ再溶解によって製造した第１表に示す
化学成分を有するロール材に対して、低周波誘導炉に上
る漸進加熱、漸進水焼入れ及び・サブゼロ処理を施した
。ロール材は、マンガ／及びクロムを除いてほぼ同じ含
有量にした。。試料の寸法は６００鳩φである。漸進加
熱の温度は９５０’Ｃ。EXAMPLE A roll material manufactured by electroslag remelting and having the chemical components shown in Table 1 was subjected to gradual heating in a low frequency induction furnace, gradual water quenching and sub-zero treatment. The roll materials had approximately the same content except manga/chromium. . The dimensions of the sample are 600 mm. The temperature of gradual heating is 950'C.

ロールの送り速度は３５ｒｍ／ｍｉｎとしだ。サブゼロ
処理は一１００℃とし冷媒に液体窒素を用いた。The feed speed of the roll was 35 rm/min. The sub-zero treatment was carried out at -100°C and liquid nitrogen was used as the refrigerant.

第１表 各試料のショア硬さＨ［１９０以上を有する焼入れ硬化
層深さは第２表の通りである。Table 1: The depth of the quenched hardened layer having Shore hardness H[190 or more of each sample is shown in Table 2.

マンガン量とＨｇ９０以上を有する焼入れ硬化層深さと
の関係を第１図に示し、同じくクロム量との関係を第２
図に示す。低周波誘導炉による漸進加熱、焼入れ及びサ
ブゼロ処理の効果は、マンガン量及びクロム量゛によっ
て著しい影響を受けることが明らかである。Figure 1 shows the relationship between the amount of manganese and the depth of the hardened layer with Hg90 or more, and the relationship with the amount of chromium is shown in Figure 2.
As shown in the figure. It is clear that the effectiveness of progressive heating, quenching and sub-zero treatment with a low frequency induction furnace is significantly influenced by the amount of manganese and the amount of chromium.

以上、本発明によれば焼入れ硬化層深さの著しく大きい
ロールを得ることができる。As described above, according to the present invention, it is possible to obtain a roll having a significantly large quench hardening layer depth.

晶警crystal police

【図面の簡単な説明】[Brief explanation of drawings]

Claims (1)

【特許請求の範囲】[Claims] １、マンガン０．７〜１，５重量係とクロム４〜５重量
％を含有するロール材を低周波誘導炉により漸進加熱し
てから漸進焼入れし、次いでサブゼロ処理することを特
徴とする圧延ロールの製造法。1. A rolling roll characterized in that a roll material containing 0.7 to 1.5% by weight of manganese and 4 to 5% by weight of chromium is gradually heated in a low frequency induction furnace, then gradually quenched, and then subjected to sub-zero treatment. manufacturing method.
JP18919381A 1981-11-27 1981-11-27 Production of rolling roll Pending JPS5891125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18919381A JPS5891125A (en) 1981-11-27 1981-11-27 Production of rolling roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18919381A JPS5891125A (en) 1981-11-27 1981-11-27 Production of rolling roll

Publications (1)

Publication Number Publication Date
JPS5891125A true JPS5891125A (en) 1983-05-31

Family

ID=16237066

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18919381A Pending JPS5891125A (en) 1981-11-27 1981-11-27 Production of rolling roll

Country Status (1)

Country Link
JP (1) JPS5891125A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360258A (en) * 1986-08-29 1988-03-16 Hitachi Ltd Rolling roll having resistance to accident

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360258A (en) * 1986-08-29 1988-03-16 Hitachi Ltd Rolling roll having resistance to accident

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