JPH01156428A - Manufacture of steel belt - Google Patents

Manufacture of steel belt

Info

Publication number
JPH01156428A
JPH01156428A JP31364087A JP31364087A JPH01156428A JP H01156428 A JPH01156428 A JP H01156428A JP 31364087 A JP31364087 A JP 31364087A JP 31364087 A JP31364087 A JP 31364087A JP H01156428 A JPH01156428 A JP H01156428A
Authority
JP
Japan
Prior art keywords
steel belt
welded part
steel
immersed
heated
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
JP31364087A
Other languages
Japanese (ja)
Other versions
JPH0159338B2 (en
Inventor
Kazuo Sato
一雄 佐藤
Akinori Nakai
中井 昭徳
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 JP31364087A priority Critical patent/JPH01156428A/en
Publication of JPH01156428A publication Critical patent/JPH01156428A/en
Publication of JPH0159338B2 publication Critical patent/JPH0159338B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To manufacture a tough and thin steel belt by welding the end part of a zonal material consisting of carbon steel into the body having no ends and successively executing annealing, quenching and tempering at least to the welded part. CONSTITUTION:The both end parts of the zonal material formed with the carbon steel (about 0.5-0.85% C) are mutually confronted to weld into the body having no ends; the welded part is heated to about 760 deg.C in a neutral salt bath of CaCl and NaCl, is naturally cooled and is annealed. The surface of the welded part is then polished to finish, is immersed into the neutral salt bath of about 830 deg.C, is heated into the state of austenite, is thereafter immersed into the mixed soln. of potassium nitride and sodium nitride, is retained to about 260 deg.C and is quenched. The part is further heated to about 430 deg.C in the mixed soln. of potassium nitride and nitrous acid, is slowly cooled and is tempered. In this way, weak compsn. is not produced in the welded part and the strength is drastically improved, by which the tough and thin steel belt can be obtd.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は大理石等の建築材料や、石英ガラス等の光学材
料の切断に用いられるスチールベルトに係り、さらに詳
細には同スチールベルトの溶接部の強度を著しく向上さ
せることができるスチールベルトの製造方法に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steel belt used for cutting architectural materials such as marble and optical materials such as quartz glass, and more specifically relates to a welded portion of the steel belt. The present invention relates to a method of manufacturing a steel belt that can significantly improve the strength of the steel belt.

E従来技術J 表面にダイヤモンドの粒子を塗布したスチールベルトを
用い、これを高速で回転させつつ、大理石等の建築材料
や、石英ガラス等の光学材料の切断を行なうことは周知
である。
EPrior Art J It is well known to use a steel belt coated with diamond particles on its surface and rotate it at high speed to cut architectural materials such as marble or optical materials such as quartz glass.

この種のスチールベルトは切断具とし苛酷な使用状況に
耐え得るもでなければならず、従って硬くなればならな
いのは勿論であるが同時に疲労に対しても強くなければ
ならない。このような要請から従来においては、この種
のスチールベルトは以下のようにして製造されていた。
This type of steel belt must be able to withstand harsh conditions of use as a cutting tool, and therefore must not only be hard but also resistant to fatigue. In response to such demands, this type of steel belt has conventionally been manufactured in the following manner.

即チ、■炭素鋼よりなる帯状の素材を焼き入れし、次い
で ■その端部を突き合わせ溶接して無端体としだ後 ■焼戻しする。
First, 1. Harden a band-shaped material made of carbon steel, then 2. Butt-weld its ends to form an endless body, and 2. Temper it.

周知のように炭素鋼は焼き入れすることによって硬くな
り、さらにこの焼き入れされた炭素鋼を適宜の温度で焼
戻しすることによって、硬さを保持した状態で材料にね
ばりを生じさせることができる。
As is well known, carbon steel becomes hard when it is hardened, and by further tempering the hardened carbon steel at an appropriate temperature, it is possible to make the material sticky while maintaining its hardness.

[解決すべき問題点] ところで近年、上述のスチールベルトは、電子部品材料
、例えばシリコン、ゲルマニウム、人工水晶等の切断に
も用いられている。特にICやLSIが形成されたシリ
コンスライスの切り出しに用いられるスチールベルトが
現在量も注目されている。即ち、半導体分野での技術の
進歩は極めて早く、特に集積度の向上は著しい。この集
積度の向上に伴ってシリコンスライスをできるかぎり薄
く切り出すことが要望されている。薄いスライス片を切
り出すためにはベルトは薄くなければならない。
[Problems to be Solved] In recent years, the above-mentioned steel belts have also been used to cut electronic component materials, such as silicon, germanium, artificial quartz, and the like. In particular, the current quantity of steel belts used to cut out silicon slices on which ICs and LSIs are formed is attracting attention. In other words, technology in the semiconductor field is progressing extremely rapidly, and in particular, the degree of integration has improved significantly. As the degree of integration increases, it is desired to cut silicon slices as thinly as possible. The belt must be thin in order to cut thin slices.

しかしながら従来のスチールベルトはその製造工程にお
いて、上述のように■炭素鋼よりなる帯状の素材を焼き
入れした後、■その端部を突き合わせ溶接し無端体とし
ており、従って溶接することによって既に焼き入れされ
た状態にある両端部、即ち溶接部が極めて高温状態から
焼戻しされた状態になり、その部分の組成が極めて軟弱
になるという問題があった。このため薄くすると溶接部
の強度が不足し、切断事故が発生する虞れがあり、極端
に薄くすることができなかった。一方、近年の半導体技
術の進歩に伴い、薄いスライス片の切り出しの要請は益
々高まっており、薄くて丈夫なスチールベルトの開発が
望まれていた。
However, in the manufacturing process of conventional steel belts, as mentioned above, ■ after hardening a belt-shaped material made of carbon steel, ■ the ends are butt-welded to form an endless body. There was a problem in that both end portions, that is, the welded portions, which were in a tempered state, went from an extremely high temperature state to a tempered state, and the composition of that portion became extremely soft. For this reason, if the weld is made thinner, the strength of the welded part may be insufficient and a cutting accident may occur, so it has not been possible to make the weld extremely thin. On the other hand, with recent advances in semiconductor technology, there has been an increasing demand for cutting thin slices, and there has been a desire for the development of thin and durable steel belts.

本発明は上記事情に鑑みてなされたもので、溶接部の強
度を著しく向上させることができ、従って薄くて丈夫な
スチールベルトを製造することができるスチールベルト
の製造方法を提供することを目的とする。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a steel belt that can significantly improve the strength of the welded part and, therefore, can manufacture a thin and durable steel belt. do.

[問題点の解決手段] 上記目的を達成するために本発明は、炭素鋼よりなる帯
状の素材の端部を突き合わせ溶接して無端体にした後、
該無端体の少なくとも溶接部を焼鈍し1.次いで該焼鈍
した無端体を焼き入れした後、該焼き入れした無端体を
焼戻しすることを特徴とする。
[Means for Solving Problems] In order to achieve the above object, the present invention includes butt-welding the ends of a strip-shaped material made of carbon steel to form an endless body, and then
Annealing at least the welded portion of the endless body.1. Next, the annealed endless body is hardened, and then the hardened endless body is tempered.

[実施例] 以下図面を参照して本発明の実施例について説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.

スチールベルトの材料としては、いわゆるSK材と称さ
れる炭素の割合が0.5〜0.85%の高炭素鋼を用い
る。
As a material for the steel belt, a high carbon steel with a carbon content of 0.5 to 0.85%, which is so-called SK material, is used.

(1)溶接工程 上述の炭素鋼によって形成された帯状の素材(焼鈍され
た材料)を用意し、これの両端部を互いに突き合わせ溶
接することにより無端体、即ちスチールベルトにする。
(1) Welding process A band-shaped material (annealed material) made of the above-mentioned carbon steel is prepared, and both ends of the material are butt welded to form an endless body, that is, a steel belt.

(2)焼鈍工程 上記スチールベルトの溶接部は、組成が変化して非常に
硬く、かつ脆くなっている。溶接部からこの性質を除去
するために焼鈍する。
(2) Annealing process The composition of the welded portion of the steel belt changes, making it extremely hard and brittle. Annealing to remove this property from the weld.

焼鈍には中性塩炉を用いる。この炉内は塩化カリウムと
塩化ナトリウムの混合液で満たされており、この混合液
が760°Cに加熱保持されている。
A neutral salt furnace is used for annealing. The inside of this furnace is filled with a mixed solution of potassium chloride and sodium chloride, and this mixed solution is heated and maintained at 760°C.

この混合液内に上記スチールベルトの溶接部を浸漬する
。この場合、スチールベルト全体を浸漬しても良い。
The welded portion of the steel belt is immersed in this mixed solution. In this case, the entire steel belt may be immersed.

浸漬後、20分経過した後、浸漬した状態で炉の加熱を
停止し、自然冷却させる。これによって溶接部が焼鈍さ
れ、溶接前の状態に戻る。即ち、溶接部の組成が他の部
分の組成と同じになる。
After 20 minutes have elapsed after immersion, the heating of the furnace is stopped in the immersed state, and the sample is allowed to cool naturally. This causes the weld to be annealed and return to its pre-weld state. That is, the composition of the welded part becomes the same as that of other parts.

次いで溶接部の表面を研磨して仕上げする。The surface of the weld is then polished and finished.

(3)焼き入れ工程 焼き入れには第1図に示す治具を使用する。この治具は
環状のフレームlと、このフレーム1の内側にあって同
フレーム1を補強する複数の補強材2.2・・・とを有
しており、さらに上記フレームl及び補強材2には垂直
上方に、複数のポスト3.3・・・が突設されている。
(3) Hardening process The jig shown in Fig. 1 is used for hardening. This jig has an annular frame l and a plurality of reinforcing members 2, 2, etc. that are located inside the frame 1 and reinforce the same frame 1, and furthermore, the frame l and the reinforcing members 2 are A plurality of posts 3.3... are provided vertically upwardly in a protruding manner.

またこの治具の中央には同治具を支持するフック4が補
強材2に固定されている。
Further, a hook 4 for supporting the jig is fixed to the reinforcing member 2 at the center of the jig.

焼き入れを行う場合には第1図に示すように、上記治具
上に素材であるスチールベルト5をatする。その際、
スチールベルト5をボスト3.3・・にからめるように
することによってスチールベルト5が治具上に保持され
る。モして治具と共にスチールベルト5を上述した中性
塩浴炉に浸漬する。
When hardening is performed, a steel belt 5, which is a raw material, is placed on the jig as shown in FIG. that time,
The steel belt 5 is held on the jig by intertwining the steel belt 5 with the posts 3.3. Then, the steel belt 5 and the jig are immersed in the above-mentioned neutral salt bath furnace.

今回炉内の混合液は約830℃、即ち炭素鋼の変態点(
A、)以上に加熱保持されている。この混合液内に上記
素材であるスチールベルト5を約120秒間浸漬する。
This time, the mixed liquid in the furnace was at about 830℃, which is the transformation point of carbon steel (
A,) is maintained at a higher temperature. The steel belt 5, which is the material mentioned above, is immersed in this mixed solution for about 120 seconds.

これによってスチールベルト5はオーステナイト状態に
なる。
As a result, the steel belt 5 becomes austenitic.

次にこのオーステナイト状態になったスチールベルト5
を中性塩浴炉から引き上げ、治具と共に冷却槽に浸漬す
る。冷却槽は亜硝酸カリと亜硝酸ソーダの混合液で満た
されており、この混合液が約260°Cに加熱保持され
ている。この混合液内にスチールベルト5を約16分間
浸漬する。
Next, the steel belt 5 which has become this austenitic state
is lifted from the neutral salt bath furnace and immersed in the cooling tank together with the jig. The cooling tank is filled with a mixed solution of potassium nitrite and sodium nitrite, and this mixed solution is heated and maintained at about 260°C. The steel belt 5 is immersed in this mixed solution for about 16 minutes.

オーステナイト状態になったスチールベルト5を冷却槽
に浸漬することにより、スチールベルト5が冷えて硬化
する。その際、冷却槽内の混合液の温度が上述のように
比較的高いので、スチールベルト5内の組織が針状ベイ
ナイトに等温変態する。このように組織が針状ベイナイ
トに変態することにより、後に焼戻ししたときにスチー
ルベルトが通常に比べて高い屈曲性と対衝撃性を示すよ
うになる。
By immersing the steel belt 5 in an austenitic state in a cooling tank, the steel belt 5 is cooled and hardened. At this time, since the temperature of the liquid mixture in the cooling tank is relatively high as described above, the structure within the steel belt 5 undergoes isothermal transformation into acicular bainite. This transformation of the structure into acicular bainite allows the steel belt to exhibit higher flexibility and impact resistance than usual when tempered later.

(4)焼戻し 焼き入れされたスチールベルト5は硬い反面、粘りがな
く脆くなっている。また内部に残留応力が生じて変形し
ている。そこで第2図に示す治具に、焼き入れしたスチ
ールベルト5を挟んで焼戻し槽に浸漬する。
(4) Although the tempered and hardened steel belt 5 is hard, it has no stickiness and is brittle. Also, residual stress is generated inside, causing deformation. Therefore, the hardened steel belt 5 is sandwiched between the jig shown in FIG. 2 and immersed in a tempering tank.

第2図に示す治具は一種の矯正具であり、円形の外輪1
0と円形の内輪11とを有している。第3図に示すよう
に、これら外輪10と内輪11の間に焼き入れによって
変形したスチールベルト5を挟み、複数の締結具12.
12・・・によって固定する。これによりスチールベル
ト5の形状を円形に矯正し、焼戻しの間その形状を保持
させる。
The jig shown in Fig. 2 is a kind of correction tool, with a circular outer ring 1
0 and a circular inner ring 11. As shown in FIG. 3, a steel belt 5 deformed by hardening is sandwiched between the outer ring 10 and the inner ring 11, and a plurality of fasteners 12.
12... is fixed. As a result, the shape of the steel belt 5 is corrected into a circular shape, and the shape is maintained during tempering.

焼戻し槽は、冷却槽と同様に亜硝酸カリと亜硝酸ソーダ
の混合液で満たされており、この混合液が約430℃に
加熱保持されている。この混合液内に第2図に示す治具
に保持されたスチールベルト5を約20分間浸漬する。
The tempering tank, like the cooling tank, is filled with a mixed solution of potassium nitrite and sodium nitrite, and this mixed solution is heated and maintained at about 430°C. The steel belt 5 held by the jig shown in FIG. 2 is immersed in this mixed solution for about 20 minutes.

そして浸漬後、焼戻し槽から取り出したスチールベルト
5を第2図に示す治具に保持した状態でゆっくり冷却す
る。これによりスチールベルト5は硬さを保持した状態
で粘りを有するようになり、更に残留応力がとれて円形
になる。
After dipping, the steel belt 5 taken out from the tempering bath is slowly cooled while being held in a jig shown in FIG. As a result, the steel belt 5 becomes sticky while maintaining its hardness, and furthermore, the residual stress is removed and the belt becomes circular.

上述の方法により製造したスチールベルト5の特徴は、
溶接部の組織が他の部分の組織と同じになり、強度等の
物理的性質が全ての部分において均一になるという点に
ある。
The characteristics of the steel belt 5 manufactured by the above method are as follows:
The structure of the welded part is the same as that of other parts, and the physical properties such as strength are uniform in all parts.

第4図はミクロビッカース硬度計により3009の荷重
をかけ、溶接部付近のビッカース硬さを測定した測定結
果を示すグラフである。第4図(イ)は従来のスチール
ベルト(完成品)の測定結果を示し、第4図(ロ)は本
実施例により製造したスチールベルトの測定結果をしめ
している。
FIG. 4 is a graph showing the measurement results of the Vickers hardness near the welded part under a load of 3009 using a micro Vickers hardness meter. FIG. 4(a) shows the measurement results of the conventional steel belt (finished product), and FIG. 4(b) shows the measurement results of the steel belt manufactured according to this example.

この第4図(イ)に示すグラフから明らかなように、従
来のスチールベルトには溶接の中心を挟んで両側に極め
て軟弱な組織が分布している。これに対して本実施例に
より製造したスチールベルト5においては同図(ロ)に
示すように、溶接部であっても硬度は他の部分と全く同
じである。従ってスチールベルト自体の引張強度も向上
し、実験によれば従来のスチールベルトの引張強度が1
16〜II^/mrn”であるのにだいし、本実施例に
より製造されたスチールベルトの引張強度は156〜r
 s ske/fn□2であった。
As is clear from the graph shown in FIG. 4(a), the conventional steel belt has an extremely soft structure distributed on both sides of the weld center. On the other hand, in the steel belt 5 manufactured according to the present example, as shown in FIG. 5B, even the welded portion has the same hardness as other parts. Therefore, the tensile strength of the steel belt itself has improved, and experiments have shown that the tensile strength of conventional steel belts is 1
However, the tensile strength of the steel belt manufactured according to this example is 156~r/mrn''.
s ske/fn□2.

従来のスチールベルトと本実施例により製造されたスチ
ールベルトとの溶接部の組成の相異は第5図及び第6図
に示す#常写真からも明らかであす、従来のスチールベ
ルトの溶接部には第5図に示すように、他の部分と明ら
かに組成が異なる箇所が存在している。これに対して本
実施例によって製造したスチールベルトの溶接部には、
従来のスチールベルトに見られるような組成の異なる部
分は存在せず、第6図に示すように組成は均一である。
The difference in the composition of the welded part between the conventional steel belt and the steel belt manufactured according to this example is clear from the photographs shown in Figures 5 and 6. As shown in FIG. 5, there are parts where the composition is clearly different from other parts. On the other hand, in the welded part of the steel belt manufactured according to this example,
There are no parts with different compositions as seen in conventional steel belts, and the composition is uniform as shown in FIG.

このように本実施例によって製造したスチールベルトに
おいては、強度が全体的に均一なので従来のスチールベ
ルトに比べて丈夫でかつ薄いスチールベルトを製造する
ことができる。
As described above, the steel belt manufactured according to this embodiment has uniform strength throughout, making it possible to manufacture a steel belt that is stronger and thinner than conventional steel belts.

[発明の効果] 以上説明したように本発明によれば、炭素鋼よりなる帯
状の素材の端部を突き合わせ溶接して無端体にした後、
該無端体の少なくとも溶接部を焼鈍し、次いで該焼鈍し
た無端体を焼き入れした後、該焼き入れした無端体を焼
戻ししたので、溶接部に軟弱な組成が生じなくなり、溶
接部の強度が従来に比べて著しく向上する。この結果、
丈夫でかつ薄いスチールベルトを製造することができ、
シリコンスライス等の加工材をより薄く切り出すことが
できる。
[Effects of the Invention] As explained above, according to the present invention, after butt welding the ends of a strip-shaped material made of carbon steel to form an endless body,
Since at least the welded portion of the endless body is annealed, and then the annealed endless body is quenched, the quenched endless body is tempered, so that a soft composition does not occur in the welded portion, and the strength of the welded portion is lower than that of the conventional one. significantly improved compared to . As a result,
We can produce strong and thin steel belts,
Processed materials such as silicon slices can be cut into thinner pieces.

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

第1図は本発明にかかる実施例の一工程である焼き入れ
に用いられる治具を示す斜視図、第2図は同実施例の他
の工程である焼戻しに用いられる治具を示す斜視図、第
3図は第2図に示す治具の断面図、第4図(イ)及び(
ロ)は各々、従来のスチールベルト及び本発明にかかる
実施例によって製造されたスチールベルトの溶接部の硬
度分布図は本発明にかかる方法により製造したスチール
1:環状のフレーム、2:補強材、3:ボスト、4:フ
ック、5ニスチールベルト、10:外輪、11:内輪、
12:締結具。 特許出願人      佐 藤 −雄 中井昭徳 第1図 す 第2図 第4図 中曵′ 中曵゛ 第5 図 第6図 手  続  袖  正  書 平成順科牛元年1月26日
FIG. 1 is a perspective view showing a jig used for hardening, which is one step in the embodiment of the present invention, and FIG. 2 is a perspective view showing a jig used in tempering, which is another step in the same embodiment. , Fig. 3 is a sectional view of the jig shown in Fig. 2, Fig. 4 (a) and (
B) shows the hardness distribution diagrams of the welded parts of a conventional steel belt and a steel belt manufactured according to an embodiment of the present invention. Steel 1: annular frame, 2: reinforcing material, 3: Bost, 4: Hook, 5 steel belt, 10: Outer ring, 11: Inner ring,
12: Fastener. Patent Applicant Sato - Akinori Yunakai Figure 1, Figure 2, Figure 4, Figure 4, Figure 5, Figure 6, Procedures, Masa Sode, January 26, 1996.

Claims (1)

【特許請求の範囲】 (イ)炭素鋼よりなる帯状の素材の端部を突き合わせ溶
接して無端体にする工程と、 (ロ)前記無端体の少なくとも溶接部を焼鈍する工程と
、 (ハ)前記焼鈍した無端体を焼き入れする工程と、(ニ
)前記焼き入れした無端体を焼戻しする工程と からなることを特徴とするスチールベルトの製造方法。
[Claims] (a) a step of butt-welding the ends of a strip-shaped material made of carbon steel to form an endless body; (b) annealing at least the welded portion of the endless body; and (c) a step of annealing at least the welded portion of the endless body. A method for manufacturing a steel belt, comprising the steps of: hardening the annealed endless body; and (d) tempering the hardened endless body.
JP31364087A 1987-12-11 1987-12-11 Manufacture of steel belt Granted JPH01156428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31364087A JPH01156428A (en) 1987-12-11 1987-12-11 Manufacture of steel belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31364087A JPH01156428A (en) 1987-12-11 1987-12-11 Manufacture of steel belt

Publications (2)

Publication Number Publication Date
JPH01156428A true JPH01156428A (en) 1989-06-20
JPH0159338B2 JPH0159338B2 (en) 1989-12-15

Family

ID=18043752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31364087A Granted JPH01156428A (en) 1987-12-11 1987-12-11 Manufacture of steel belt

Country Status (1)

Country Link
JP (1) JPH01156428A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014520A1 (en) * 1995-10-16 1997-04-24 Kaiser Aluminum & Chemical Corporation Casting belts for use in casting of metals and method of manufacturing same
JP2011527635A (en) * 2008-07-11 2011-11-04 アクティエボラゲット・エスコーエッフ Method for manufacturing steel components, weld lines, welded steel components, and bearing components

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5418544B2 (en) * 2011-06-23 2014-02-19 新日鐵住金株式会社 High strength, high fatigue strength thin steel strip, endless steel strip and method for producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014520A1 (en) * 1995-10-16 1997-04-24 Kaiser Aluminum & Chemical Corporation Casting belts for use in casting of metals and method of manufacturing same
US6063215A (en) * 1995-10-16 2000-05-16 Kaiser Aluminum & Chemical Corporation Method of manufacturing casting belts for use in the casting of metals
JP2011527635A (en) * 2008-07-11 2011-11-04 アクティエボラゲット・エスコーエッフ Method for manufacturing steel components, weld lines, welded steel components, and bearing components

Also Published As

Publication number Publication date
JPH0159338B2 (en) 1989-12-15

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