JPS63270412A - Solid solution heat treatment method for stainless h-beam steel - Google Patents
Solid solution heat treatment method for stainless h-beam steelInfo
- Publication number
- JPS63270412A JPS63270412A JP10393387A JP10393387A JPS63270412A JP S63270412 A JPS63270412 A JP S63270412A JP 10393387 A JP10393387 A JP 10393387A JP 10393387 A JP10393387 A JP 10393387A JP S63270412 A JPS63270412 A JP S63270412A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- web
- stainless
- heat treatment
- cooling
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 239000006104 solid solution Substances 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 23
- 239000004744 fabric Substances 0.000 abstract description 4
- 238000007664 blowing Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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 Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、ステンレスＨ形鋼の固溶化熱処理方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a solution heat treatment method for stainless H-section steel.
（ロ）従来技術
ＳＵＳ ３０２，３０４，３１６等のオーステナイト系
ステンレスは、各々材質により９２０〜１．１５０’Ｃ
まで昇温した後、急冷し、いわゆる同浴化熱処理を施し
ている。しかし、ステンレスＨ形鋼やそれに類似する形
鋼（？すえば、■形鋼や不等辺不等厚山形鋼）において
は、ウェブとフランジとの冷却速度の差に起因する歪が
発生し、形状不良材が発生することが多い。(b) Conventional technology Austenitic stainless steels such as SUS 302, 304, and 316 have a temperature of 920 to 1.150'C depending on the material.
After raising the temperature to 100%, it is rapidly cooled and subjected to so-called co-bath heat treatment. However, in stainless H-shaped steel and similar shaped steel (for example, ■-shaped steel and scalene thickness angle shaped steel), distortion occurs due to the difference in cooling rate between the web and the flange, resulting in the shape of the steel. Defective materials often occur.
Ｈ形鋼は、通常ウェブに対し、フランジが１．２〜２倍
程度厚い。そのため、全体を同一条件で冷却すると、ウ
ェブが先に冷えすぎる。その結果、熱膨張の関係より、
フランジの収縮がウェブの波打ちを起す。The flange of H-beam steel is approximately 1.2 to 2 times thicker than the normal web. Therefore, if the entire web is cooled under the same conditions, the web will cool down too much first. As a result, from the relationship of thermal expansion,
Contraction of the flange causes web waving.
これを防止するためには、フランジの両列面のみを冷却
し、ウェブの冷却を遅くするなどの方法が必要である。In order to prevent this, it is necessary to cool only the surfaces of both rows of the flange and slow down the cooling of the web.
しかし、水冷で行うと、どうしてもＨ形鋼の場合ウェブ
面に水が溜り、過冷却になってしまう。ステンレスＨ形
鋼では、小ロット品が多く、同一寸法の形鋼が連続する
ことが少なり０そのため、ノズル位置の設定替えの操作
が煩雑となり、生産性が悪かった。However, if water cooling is used, water will inevitably accumulate on the web surface of H-section steel, resulting in supercooling. Stainless steel H-section steel is often produced in small lots, and sections of the same size are rarely consecutive.As a result, the operation of changing the nozzle position is complicated, resulting in poor productivity.
このような問題点を解決する手段として、特公昭５９−
４２，０５０号公報では、加熱したステンレス鋼材を２
００℃／秒以上の速度で、水冷却を行うことにより、曲
りの少ない冷却を行う方法を開示している。この方法で
は山形鋼等は水の溜ることもないので、効果が上がる。As a means to solve these problems,
No. 42,050 discloses that heated stainless steel material is
A method is disclosed in which cooling is performed with less bending by performing water cooling at a rate of 00° C./second or more. With this method, water does not accumulate on angle irons, etc., so it is more effective.
しかし、Ｈ形鋼の場合は、Ｈ状姿勢にすると、ウェブに
水が溜り、また、Ｉ状姿勢にすると、下側フランジ面に
疵等が発生しやすくなる。さらに、冷却が上下面でわず
かに相違し、その結果、上下方向に曲り、搬送不能の事
故となる。したがって、Ｈ形鋼の場合には、このような
冷却が困難であった。However, in the case of H-beam steel, if it is in the H-shape position, water will accumulate on the web, and if it is in the I-shape position, flaws etc. are likely to occur on the lower flange surface. Furthermore, the cooling is slightly different between the upper and lower surfaces, resulting in bending in the vertical direction, resulting in an accident that makes transport impossible. Therefore, in the case of H-beam steel, such cooling is difficult.
（）・）発明が解決しようとする問題点本発明が解決し
ようとする問題点は、ステンレスＨ形鋼の冷却にともな
うウェブ波打ちを防止しうる簡便な固溶化熱処理方法を
得ることにある。()・)Problems to be Solved by the Invention The problems to be solved by the present invention are to provide a simple solution heat treatment method capable of preventing web waving due to cooling of stainless H-section steel.
（ニ）問題点を解決するための手段
本発明の方法はステンレスＨ形鋼の固溶化熱処理におい
て、固溶温度に昇熱されたＨ形鋼のウェブ片面または両
面を断熱材で覆い、冷却用流体を周囲から該Ｈ形鋼に吹
き付けることによって、上記問題点を解決している。(d) Means for Solving the Problems The method of the present invention is to cover one or both sides of the web of the H-beam heated to the solid solution temperature with a heat insulating material in the solution heat treatment of the stainless H-beam steel. The above problem is solved by spraying fluid onto the H-section steel from the surrounding area.
（ホ）作用
高温のステンレスＨ形鋼をＨ状の姿勢で長手方向に搬送
し、高速気体流を吹き付けて急冷却する〇このとき、ウ
ェブの上面側を断熱材（ＳＵＳ板、無機質耐熱布、耐熱
ボード等）で覆い、ウェブ部の冷却は、下面側よりの一
方向冷却とする。(e) Action: The high-temperature stainless steel H-shaped steel is conveyed in the longitudinal direction in an H-shaped posture, and rapidly cooled by blowing a high-speed gas flow. At this time, the upper surface of the web is (heat-resistant board, etc.), and the web section is cooled in one direction from the bottom side.
Ｈ形鋼の通常寸法はフランジ厚／ウェブ厚が１．５程度
であり、ウェブとフランジとの継ぎ部（フィレット部）
が最も厚い。フィレット部の冷却速度に、ウェブ冷却速
度を合わせるのが最良であるが、残留応力の関係より、
ウェブに引張り応力が働く方が形鋼の形状性は良くなる
。ウェブの冷却速度をフィレット部の冷却速度と同じか
または遅くなるように調整する。The normal dimensions of H-section steel are flange thickness/web thickness of about 1.5, and the joint part (fillet part) between the web and flange.
is the thickest. It is best to match the web cooling rate to the fillet cooling rate, but due to residual stress,
The shapeability of the section steel improves when tensile stress is applied to the web. The cooling rate of the web is adjusted to be the same as or slower than the cooling rate of the fillet.
冷却速度をあまり遅くすると、ウェブに過大の引張応力
が残留し、応力腐食割れ等の原因となる。If the cooling rate is too slow, excessive tensile stress remains in the web, causing stress corrosion cracking and the like.
そこで、Ｈ形鋼の寸法比より見て、ウェブを片側からの
冷却にする。なお、断熱材は加熱前にＨ形鋼上に載置す
るのが、作業性より好ましい。しかし、加熱炉出側の冷
却直前に、断熱材を載置してもよい。断熱材の厚みが薄
い場合（例えば、不足形耐火材を吹付けにより付着させ
た場合）は、片面だけでは断熱不足となるので、両面よ
り断熱材で覆うことにより、冷却速度を調整できる。Therefore, considering the dimensional ratio of the H-section steel, the web is cooled from one side. Note that it is preferable for workability to place the heat insulating material on the H-shaped steel before heating. However, a heat insulating material may be placed immediately before cooling on the exit side of the heating furnace. If the thickness of the insulation material is thin (for example, when a deficient refractory material is applied by spraying), insulation will be insufficient if only one side is used, so the cooling rate can be adjusted by covering both sides with insulation material.
（ホ）実施例
第１図に示すように、ＨＸＢ 、ｔｌ／１２が１９４×
１５０．６／９の５ＵＳ３０４Ｈ形鋼１を熱間圧延にて
生遺し、定尺切断しくｌ１ｍ）、冷却後矯正機にて±２
ｍｍ／ ５ ｍ以下の曲り量とした。(E) Example As shown in FIG. 1, HXB, tl/12 is 194×
150.6/9 5US304H section steel 1 was hot rolled, cut to a specified length (l1m), and after cooling, it was straightened by a straightening machine to ±2
The amount of bending was set to be less than mm/5 m.
次に、ウェブ上面に無機質短繊維よりなる２５龍厚の断
熱布２（商品名：カオウール）を乗せ、Ｈ状の姿勢で、
加熱炉に入れ、１，０５０℃で約５分均熱する。抽出と
同時に、加熱Ｈ形鋼１の上下左右付近に配した冷却ヘッ
ダ３より、圧縮空気（３〜５Ｋｇ／Ｃ／Ｌ）を吹き付け
た。Ｈ形鋼の搬送速度は０．２５７ｎ／ ｓｅｃとし、
冷却ゾーンは５ｍで、合計４．０００ ｍ３／ｍｉｎの
空気により冷却を行った。Next, a heat insulating cloth 2 (trade name: Kao Wool) made of inorganic short fibers with a thickness of 25 mm is placed on the upper surface of the web, and in an H-shaped position,
Place in a heating furnace and soak at 1,050°C for about 5 minutes. Simultaneously with the extraction, compressed air (3 to 5 kg/C/L) was blown from the cooling headers 3 placed near the top, bottom, left and right of the heated H-beam 1. The conveyance speed of H-shaped steel is 0.257n/sec,
The cooling zone was 5 m long, and cooling was performed with air at a total rate of 4,000 m3/min.
その結果、ウェブ面の波打ち、材質のミクロ検査等いず
れも良好で全体の曲り量も±５ ｍｍ／ ５ ｍ以内で
あった。As a result, the waviness of the web surface, microscopic inspection of the material, etc. were all good, and the total amount of bending was within ±5 mm/5 m.
断熱布なしの場合は、ウェブ面に５〜８朋程度の波打ち
が生じた。In the case without the heat insulating cloth, undulations of about 5 to 8 mm were generated on the web surface.
（へ）効果
本発明の方法によれば、簡便な方法によって、熱処理後
のステンレスＨ形鋼のウェブ波打ち、ねじれ、ウェブ座
屈、フランジ倒れ等の形状不良を減少させることができ
る。(f) Effects According to the method of the present invention, shape defects such as web waving, twisting, web buckling, and flange collapse of stainless H-section steel after heat treatment can be reduced by a simple method.
本発明の方法はステンレスのＨ形鋼ばかりではなく、不
等辺不等厚山形鋼にも適用できる。The method of the present invention can be applied not only to stainless steel H-beams but also to scalene angle-thickness angle steels.
第１図は本発明の詳細な説明図。 １ニステンレスＨ形鋼 ２：断熱布３：冷却ヘッダ 特許出願人 住友金属工業株式会社 ニー”−ｉ （外５名） FIG. 1 is a detailed explanatory diagram of the present invention. 1. Stainless steel H-beam 2: Heat insulation cloth 3: Cooling header Patent applicant: Sumitomo Metal Industries, Ltd. Knee”-i (5 other people)
Claims (1)
昇熱されたＨ形鋼のウェブ片面または両面を断熱材で覆
い、冷却用流体を周囲から該Ｈ形鋼に吹き付けることを
特徴としたステンレスＨ形鋼の固溶化熱処理方法。In solution heat treatment of stainless steel H-shaped steel, one or both sides of the web of the H-shaped steel heated to the solid solution temperature is covered with a heat insulating material, and a cooling fluid is sprayed onto the H-shaped steel from the surroundings. Solution heat treatment method for H-beam steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10393387A JPS63270412A (en) | 1987-04-27 | 1987-04-27 | Solid solution heat treatment method for stainless h-beam steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10393387A JPS63270412A (en) | 1987-04-27 | 1987-04-27 | Solid solution heat treatment method for stainless h-beam steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63270412A true JPS63270412A (en) | 1988-11-08 |
Family
ID=14367236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10393387A Pending JPS63270412A (en) | 1987-04-27 | 1987-04-27 | Solid solution heat treatment method for stainless h-beam steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63270412A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010174289A (en) * | 2009-01-28 | 2010-08-12 | Kobe Steel Ltd | Quenching method preventing heat-treatment strain |
| CN106191402A (en) * | 2016-08-31 | 2016-12-07 | 无锡派克新材料科技股份有限公司 | A kind of heat treatment method improving 17 4PH alloy strengths |
-
1987
- 1987-04-27 JP JP10393387A patent/JPS63270412A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010174289A (en) * | 2009-01-28 | 2010-08-12 | Kobe Steel Ltd | Quenching method preventing heat-treatment strain |
| CN106191402A (en) * | 2016-08-31 | 2016-12-07 | 无锡派克新材料科技股份有限公司 | A kind of heat treatment method improving 17 4PH alloy strengths |
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