JPH02205620A - Heat treatment tray having welded structure - Google Patents
Heat treatment tray having welded structureInfo
- Publication number
- JPH02205620A JPH02205620A JP2078189A JP2078189A JPH02205620A JP H02205620 A JPH02205620 A JP H02205620A JP 2078189 A JP2078189 A JP 2078189A JP 2078189 A JP2078189 A JP 2078189A JP H02205620 A JPH02205620 A JP H02205620A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- ribs
- tray
- heat
- treatment tray
- 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
- 238000010438 heat treatment Methods 0.000 title abstract description 32
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052745 lead Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 abstract description 13
- 229910045601 alloy Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- KKIWLGAMEWOSQL-UHFFFAOYSA-N n-nitroso-n-propylpropanamide Chemical compound CCCN(N=O)C(=O)CC KKIWLGAMEWOSQL-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、連続炉等の熱処理炉において使用される熱処
理トレイに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat treatment tray used in a heat treatment furnace such as a continuous furnace.
従来の技術
金属材料よりなる加工材を熱処理する場合、加工材を熱
処理トレイに載置し、熱処理炉に導入して処理すること
がしばしば行われている。従来、その際に使用する熱処
理トレイとしては、例えばＪＩＳ Ｇ５１１２５ＣＨ１
３等の鋳鋼を鋳込んで製造されたものが一般に使用され
ている。BACKGROUND ART When heat treating a workpiece made of a metal material, the workpiece is often placed on a heat treatment tray and introduced into a heat treatment furnace for treatment. Conventionally, the heat treatment tray used in this case is, for example, JIS G51125CH1.
Those manufactured by casting grade 3 cast steel are generally used.
発明が解決しようとする課題
ところで、熱処理炉において熱ロスを少なくし、熱処理
を効率的に行なうためには、肉薄の熱処理トレイを使用
することが望ましい、ところが、鋳鋼で複雑な形状で肉
薄のものを製造しようとすると、溶湯の流れが悪く、鋳
造欠陥が生じ、また使用に際してヒートクラックが頻繁
に生じると言う問題があった。Problems to be Solved by the Invention By the way, in order to reduce heat loss and perform heat treatment efficiently in a heat treatment furnace, it is desirable to use a thin-walled heat treatment tray. When attempting to manufacture the same, there were problems in that the flow of the molten metal was poor, casting defects occurred, and heat cracks frequently occurred during use.
本発明は、従来の技術における上記のような間開点に鑑
みてなされたものである。The present invention has been made in view of the above-mentioned gap in the conventional technology.
したがって、本発明の目的は、肉薄の圧延材薄板より形
成され、耐ヒートクラツク性の優れた長寿命の熱処理ト
レイを提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat treatment tray that is formed from a thin rolled sheet and has excellent heat crack resistance and a long life.
課題を解決するための手段
本発明者は、検討の結果、特定の合金組成を有する圧延
鋼材が溶接性に優れ、熱処理トレイの作製に好適である
ことを見出だし、本発明を完成するに至った。Means for Solving the Problems As a result of studies, the inventor of the present invention discovered that rolled steel having a specific alloy composition has excellent weldability and is suitable for producing heat-treated trays, and has completed the present invention. Ta.
即ち、本発明の熱処理トレイは、重量％で、Ｃ：０．２
〜０．３％、Ｓ ｉ ： ０．１〜０．３％、Ｍｎ：１
．５％以下、Ｎ ｌ ： １２．５〜１３．５％、Ｃｒ
： ２４．０〜２５．０％、ｐ ｂ ： １ｏｐｐｎ
以下、Ｏ： ８０Ｅｌｌ）ｌ以下、及び残部Ｆｅからな
る合金組成を有する圧延材長尺薄板を網目状に組立て、
溶接してなることを特徴とする。That is, the heat treatment tray of the present invention has C: 0.2 in weight%.
~0.3%, Si: 0.1~0.3%, Mn: 1
．． 5% or less, Nl: 12.5-13.5%, Cr
: 24.0-25.0%, pb: 1oppn
Hereinafter, long thin sheets of rolled material having an alloy composition of O: 80El or less and the balance consisting of Fe are assembled in a mesh shape,
It is characterized by being welded.
本発明の熱処理トレイにおける圧延材長尺薄板は、上記
の合金組成を有するものであるが、それ等の成分の限定
理由について説明する。The rolled long thin plate in the heat treatment tray of the present invention has the above-mentioned alloy composition, and the reasons for limiting these components will be explained.
Ｃ： ０．２〜０．３％
Ｃは熱処理トレイの耐熱性及び強度を確保するのに有効
な元素であり、その量が０．２％より低くなると、耐熱
強度が劣り、使用中にヒートクラックが発生するように
なる。また０、３％よりも多くなると、溶接時に溶接ク
ラックが発生するようになり、溶接が十分に実施できな
くなる。C: 0.2-0.3% C is an effective element for ensuring the heat resistance and strength of the heat treatment tray. If the amount is lower than 0.2%, the heat resistance strength will be poor and the Cracks begin to occur. Moreover, if it exceeds 0.3%, welding cracks will occur during welding, making it impossible to perform welding satisfactorily.
Ｓｉ：０．１〜０，３％
Ｓｌは脱酸及び耐酸化性向上の為に有用な元素であり、
その様な効果を発揮させるために０．１％が必要である
。しかしながら、その量が０．３％よりも多くなると、
溶接性が悪くなり、溶接時にクラックが生じるようにな
る。Si: 0.1-0.3% Sl is a useful element for deoxidation and improving oxidation resistance,
0.1% is required to exhibit such an effect. However, when the amount is greater than 0.3%,
Weldability deteriorates and cracks occur during welding.
Ｍ ｎ ：Ｌ５％以下
Ｍｎも脱酸のために有用な元素であり、脱酸作用を発揮
させるために、好ましくは０．１％〜１．５％含有させ
る。しかしながら、その量が１．５％よりも多くなると
、溶接性が劣化する。Mn: L5% or less Mn is also an element useful for deoxidizing, and is preferably contained in an amount of 0.1% to 1.5% in order to exhibit a deoxidizing effect. However, if the amount exceeds 1.5%, weldability deteriorates.
Ｎ ｉ ： １２．５〜１３．５％
Ｎｔは耐熱性及び耐酸化性を付与するのに有効な元素で
あり、９００℃程度までの熱処理条件に耐えるようにす
る為に１２．５％含有させる。その量が多くなっても耐
熱性の向上にはそれ程寄与しなくなり、コスト的にも不
利になるので、上限は１３．５％に設定する。Ni: 12.5 to 13.5% Nt is an effective element for imparting heat resistance and oxidation resistance, and is contained at 12.5% in order to withstand heat treatment conditions up to about 900°C. . Even if the amount increases, it will not contribute much to the improvement of heat resistance and will be disadvantageous in terms of cost, so the upper limit is set at 13.5%.
Ｃｒ ： ２４．０〜２５．０％
Ｃｒは強度及び耐熱性の向上に有効な元素であり、その
機な効果を得るなめに上記の範囲で含有させる。Cr: 24.0 to 25.0% Cr is an element effective in improving strength and heat resistance, and is contained within the above range in order to obtain this advantageous effect.
Ｐ ｂ ： １０ｐｐＩＮ以下、０：８０ρρ１以下、
ｐｂ及び０は、熱処理トレイを反復使用する際における
ヒートクラック発生に関与する元素であり、粒界にＰｂ
Ｏ等の介在物を形成して、耐ヒートクラツク性を劣化さ
せるので、ｐｂは１０ｐｐＩＮ以下、０は８０ｐｐＨ以
下であることが必要である。P b: 10ppIN or less, 0:80ρρ1 or less,
Pb and 0 are elements that are involved in the generation of heat cracks when the heat treatment tray is used repeatedly, and Pb
Since inclusions such as O are formed and the heat crack resistance is deteriorated, pb needs to be 10 ppIN or less, and 0 needs to be 80 ppH or less.
作用
本発明の熱処理トレイは、上記の合金組成を有する圧延
材長尺薄板を用いるから、それを網目状に組立て、各接
合部を溶接して固定する場合、溶接性が向上し、溶接ク
ラックの発生が阻止される。Function: Since the heat treatment tray of the present invention uses rolled long thin plates having the above-mentioned alloy composition, when assembled into a mesh shape and fixed by welding each joint, weldability is improved and weld cracks are prevented. Occurrence is prevented.
また、熱処理炉において、反復使用する場合の耐ヒート
クラツク性が改善される。In addition, heat crack resistance during repeated use in a heat treatment furnace is improved.
実施例
本発明の実施例を図面によって説明する。第１図は、本
発明の熱処理トレイの平面図、第２図はＡ−Ａ線断面図
、第３図はリブの組立て状態を説明する図である。Embodiments Examples of the present invention will be explained with reference to the drawings. FIG. 1 is a plan view of the heat treatment tray of the present invention, FIG. 2 is a sectional view taken along line A-A, and FIG. 3 is a diagram illustrating the assembled state of ribs.
本発明の熱処理トレイは、外枠１に、圧延薄板より形成
された複数のリブ２を、格子状に組立て、外枠とリブ、
及びリブとリブとの各接合部３を溶接材で溶接して構成
される。外枠及びリブの厚さは、使用する熱処理炉によ
って異なるが、通常、１０１１ＩＩよりも薄い厚さのも
のを使用するのが好ましい。なお、４は搬送ロールに接
触させる為に設けられた圧延材薄板であり、リブに溶接
によって接合されている。In the heat treatment tray of the present invention, a plurality of ribs 2 formed of rolled thin plates are assembled on an outer frame 1 in a lattice shape, and the outer frame and the ribs,
And each rib-to-rib joint 3 is welded with a welding material. The thickness of the outer frame and ribs varies depending on the heat treatment furnace used, but it is usually preferable to use ones thinner than 1011II. Note that 4 is a thin plate of rolled material provided for contact with the conveyor rolls, and is joined to the ribs by welding.
この熱処理トレイにおいて、リブとリブとの組立ては、
第３図に示すように、各リブ２．２に設けられた切り欠
き溝５．５を互いに嵌合させることによって行われる。In this heat treatment tray, the rib-to-rib assembly is as follows:
As shown in FIG. 3, this is done by fitting the cutout grooves 5.5 provided in each rib 2.2 into each other.
嵌合により形成された接合部の溶接は、その４つのコー
ナー全てについて行なう。Welding of the joint formed by fitting is performed at all four corners.
次に、本発明の熱処理トレイを構成する材料について実
施例を示す。Next, examples will be shown regarding materials constituting the heat treatment tray of the present invention.
実施例１
重量％で、Ｃ： ０．２５％、Ｓ ｉ ： ０．２％、
Ｍｎ：１．０％、Ｎ ｉ ： １３．０％、Ｃｒ ：
２４．５％、Ｐｂ：８ｐｐｍ、 Ｏ： ７０ＤｐＩｌ
、及び残部Ｆｅからなる合金組成を有する厚さ５鴎、幅
６５＋＋ｕ＋の圧延材長尺薄板を、外枠及びリブとして
用意し、第１図に示されるように組み立てた後、各接合
部をＳ Ｕ Ｓ ３０９を用いて溶接し、熱処理トレイ
を作製した。この場合、溶接は良好に行われ、溶接部分
にクラックは発生しなかった。Example 1 In weight%, C: 0.25%, Si: 0.2%,
Mn: 1.0%, Ni: 13.0%, Cr:
24.5%, Pb: 8ppm, O: 70DpIl
, and the balance is Fe, a rolled long thin plate with a thickness of 5 mm and a width of 65 + u+ was prepared as an outer frame and ribs, and after assembling as shown in Fig. 1, each joint part was A heat-treated tray was produced by welding using US 309. In this case, welding was performed well and no cracks occurred in the welded area.
この熱処理トレイを連続処理炉における加熱処理に使用
して耐ヒートクラツク性の評価を行なった。１日１サイ
クルの使用割合で２２０日経過した後においても、熱処
理トレイにはヒートクラックが発生しなかった。This heat treatment tray was used for heat treatment in a continuous treatment furnace to evaluate heat crack resistance. Even after 220 days of use at one cycle per day, no heat cracks occurred in the heat-treated tray.
比較例１
重量％で、Ｃ： ０．３５％、Ｓ ｉ ： １．０％、
Ｍｎ：１．３％、Ｎ ｉ ： １３．０５％、Ｃｒ ：
２５．３％、及び残部Ｆｅからなる合金組成を有する
鋳鋼から得られた鋳造薄板について、溶接性を調べるた
めに、ＳＵ Ｓ ３０９を用いて溶接を行なった。その
結果、溶接部にクラックが発生し、充分な溶接を行なう
ことができなかった。Comparative Example 1 In weight%, C: 0.35%, Si: 1.0%,
Mn: 1.3%, Ni: 13.05%, Cr:
A cast thin plate obtained from a cast steel having an alloy composition of 25.3% Fe and the balance Fe was welded using SU S 309 in order to examine weldability. As a result, cracks occurred in the welded portion, and sufficient welding could not be performed.
比較例２
重量％で、Ｃ： ０．２５％、Ｓ ｉ ： ０．２％、
Ｍｎ：１．０ ％、Ｎ ｉ ： １３．０％、Ｃｒ
： ２４．５％、Ｐｂ：２２ｐｐｍ 、 ０ ： １
００００１１、及び残部Ｆｅからなる合金組成を有する
厚さ５ａｍ、幅６５鴎の圧延材長尺薄板を用いた以外は
、実施例１と同様にして熱処理トレイを作製しな、この
場合、溶接は良好に行われたが、熱処理トレイを反復使
用した場合における耐ヒートクラツク性に問題があった
。即ち、実施例１と同様にして耐ヒートクラツク性の評
価を行なったところ、１９０日目に辷−トクラックが発
生した。Comparative Example 2 In weight%, C: 0.25%, Si: 0.2%,
Mn: 1.0%, Ni: 13.0%, Cr
: 24.5%, Pb: 22ppm, 0:1
A heat-treated tray was produced in the same manner as in Example 1, except that a rolled long thin plate having a thickness of 5 am and a width of 65 mm and having an alloy composition of 000011 and the remainder Fe was used. In this case, the welding was good. However, there was a problem with heat crack resistance when the heat treatment tray was used repeatedly. That is, when heat crack resistance was evaluated in the same manner as in Example 1, leg cracks occurred on the 190th day.
比較例３
比較例１における合金組成の鋳鋼を用い、鋳造によって
厚さ１５＋ｎ＋、幅６５ ＩＩｍのリブを有する熱処理
トレイを作製した。この熱処理トレイについて、実施例
１におけると同様にして耐ヒートクラツク性の評価を行
なったところ、２００日目にヒートクラックが発生しな
。Comparative Example 3 Using cast steel having the alloy composition in Comparative Example 1, a heat-treated tray having ribs with a thickness of 15+n+ and a width of 65 IIm was produced by casting. When this heat-treated tray was evaluated for heat crack resistance in the same manner as in Example 1, no heat cracks occurred on the 200th day.
発明の効果
本発明の熱処理トレイは、上記の合金組成を有する圧延
材長尺薄板を用いて形成されているから、各圧延材長尺
薄板の接合部が良好に溶接されており、また、熱処理炉
で反復使用した場合における耐ヒートクラツク性に優れ
、長寿命であるという効果を生じる。また、鋳鉄により
作製された従来の熱処理トレイに比して肉薄のものが得
られるため、熱処理効率の向上をはかることができる。Effects of the Invention Since the heat-treated tray of the present invention is formed using rolled long thin plates having the above-mentioned alloy composition, the joints of each rolled long thin plate are well welded, and the heat treatment It has excellent heat crack resistance when used repeatedly in a furnace and has a long life. Furthermore, since the tray can be made thinner than conventional heat treatment trays made of cast iron, the heat treatment efficiency can be improved.
第１図は、本発明の熱処理トレイの一実施例の平面図、
第２図は、第１図のＡ−Ａ線の断面図、第３図は、組立
ての状態を説明する説明図である。
１・・・外枠、２・・・リブ、３・・・接合部、４・・
・圧延薄板、５・・・切り欠き溝。
特許出願人 大同特殊鋼株式会社
代理人 弁理士 液部 剛FIG. 1 is a plan view of an embodiment of the heat treatment tray of the present invention;
FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is an explanatory diagram illustrating the assembled state. 1...Outer frame, 2...Rib, 3...Joint part, 4...
- Rolled thin plate, 5...notch groove. Patent applicant: Daido Steel Co., Ltd. Representative: Patent attorney Tsuyoshi Hirobe
Claims (1)
〜０．３％、Ｍｎ：１．５％以下、Ｎｉ：１２．５〜１
３．５％、Ｃｒ：２４．０〜２５．０％、Ｐｂ：１０ｐ
ｐｍ以下、０：８０ｐｐｍ以下、及び残部Ｆｅからなる
合金組成を有する圧延材長尺薄板を組立て、溶接してな
ることを特徴とする熱処理トレイ。(1) In weight%, C: 0.2-0.3%, Si: 0.1
~0.3%, Mn: 1.5% or less, Ni: 12.5-1
3.5%, Cr: 24.0-25.0%, Pb: 10p
pm or less, 0:80 ppm or less, and the balance is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2078189A JPH02205620A (en) | 1989-02-01 | 1989-02-01 | Heat treatment tray having welded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2078189A JPH02205620A (en) | 1989-02-01 | 1989-02-01 | Heat treatment tray having welded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02205620A true JPH02205620A (en) | 1990-08-15 |
Family
ID=12036673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2078189A Pending JPH02205620A (en) | 1989-02-01 | 1989-02-01 | Heat treatment tray having welded structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02205620A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009149405A (en) * | 2007-12-20 | 2009-07-09 | Toyota Motor Corp | Parts feeding device |
| JP2014012872A (en) * | 2012-07-04 | 2014-01-23 | Toyo Tanso Kk | Heat treatment furnace tray |
-
1989
- 1989-02-01 JP JP2078189A patent/JPH02205620A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009149405A (en) * | 2007-12-20 | 2009-07-09 | Toyota Motor Corp | Parts feeding device |
| JP2014012872A (en) * | 2012-07-04 | 2014-01-23 | Toyo Tanso Kk | Heat treatment furnace tray |
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