JPS60133911A - Slit nozzle for cooling high temperature steel material - Google Patents

Slit nozzle for cooling high temperature steel material

Info

Publication number
JPS60133911A
JPS60133911A JP24274083A JP24274083A JPS60133911A JP S60133911 A JPS60133911 A JP S60133911A JP 24274083 A JP24274083 A JP 24274083A JP 24274083 A JP24274083 A JP 24274083A JP S60133911 A JPS60133911 A JP S60133911A
Authority
JP
Japan
Prior art keywords
nozzle
slit
outlet
interval
water
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
JP24274083A
Other languages
Japanese (ja)
Other versions
JPS6359762B2 (en
Inventor
Michiharu Hannoki
播木　道春
Hiroyuki Takashima
高島　啓行
Akira Onishi
晶 大西
Yoshio Hosokawa
細川　能夫
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP24274083A priority Critical patent/JPS60133911A/en
Publication of JPS60133911A publication Critical patent/JPS60133911A/en
Publication of JPS6359762B2 publication Critical patent/JPS6359762B2/ja
Granted 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Abstract

PURPOSE:To lower the lower limit of cooling water flow rate as lower as possible without reducing slit intervals at the outlet of a slit nozzle by specifying the ratio between the inlet slit interval of the nozzle and the outlet slit interval thereof. CONSTITUTION:A nozzle 8 is connected to the bottom discharging port of a water tank 4, and the inlet slit interval (a) at the discharging port side is made to >=3 times the outlet slit interval (b), and the space between these slits is formed into a taper one. That is, cooling water supplied to the tank 4 from the water outflowing holes 7 of a water supplying pipe 5, flows smoothly to the nozzle 8 with the aid of a flow regulating board 6, and an air is therefore prevented from flowing into the nozzle 8 even when the flow rate of cooling water is throttled. The cooling water flows down in a form of continuous plate-like flow from the outlet slits of nozzle 8 onto a high temperature thick steel plate to cool it.

Description

【発明の詳細な説明】 （産業上の利用分野）′ 本発明は、高温鋼材の冷却：用スリットノズルに係シ、
詳しくは安定呆膜が得られる下限界流量の大幅な引下げ
を可能とする冷却用スリットノズルに関するものである
。　□ （従来技術とｉの藺呟点） 例えば厚板工場モは厚鋼板の品質改善等を目的として、
加熱された厚−板を所要温度まで冷却するオンライン制
御が実施されている。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a slit nozzle for cooling high-temperature steel materials.
Specifically, the present invention relates to a cooling slit nozzle that enables a significant reduction in the lower limit flow rate at which a stable film can be obtained. □ (Complaints about conventional technology and i) For example, a plate factory uses the following methods to improve the quality of thick steel plates.
On-line control is implemented to cool the heated slab to the required temperature.

このオンライン冷却制御における厚鋼板の上面冷却用と
しては、一般にう１ナーフロー冷却が採用されており、
特に第１図に示すような板幅方向に切れ目のない板状水
流（２）を高温の厚鋼板′（１）上面に流下させるスリ
ットワンル°方式のノズル（３）が多く採用されている
。そして、このスリットノズル（３）を用い九−鋼板（
１３ｏ′オンライン冷却制御において、上記スリットノ
ズルＣ３′）：から流下される板状水流（２）の流量は
低流量域に設定した方が品質の均一性の面から曳好であ
ることは周知である。In this online cooling control, 1-nare flow cooling is generally used for cooling the top surface of thick steel plates.
In particular, a slit-one-hole type nozzle (3), which allows a continuous plate-shaped water stream (2) in the width direction of the plate to flow down onto the upper surface of a hot thick steel plate (1), as shown in FIG. 1, is often used. Then, using this slit nozzle (3), nine steel plates (
13 o' In online cooling control, it is well known that it is better to set the flow rate of the plate-shaped water stream (2) flowing down from the slit nozzle C3') to a low flow rate range from the viewpoint of quality uniformity. be.

しかし、蜀れ自のなら安矯己た板状水流□が得られる流
量の下限はノズル長さによらず第２図□に破線で示す如
くノズル出口めスリ″ット間隔によって制限を受け、仮
に乍限以ｔ′に上記流量を絞った場合にはスリットノズ
ル（３）内に空気が入り込み、板幅方向に不連続かつ断
続的□な水流になって均一冷却に支障をきたすことはな
る。However, the lower limit of the flow rate at which a stable plate-shaped water flow □ can be obtained is not dependent on the nozzle length, but is limited by the nozzle exit slit interval as shown by the broken line in Fig. 2 □. If the above-mentioned flow rate is reduced to a limit t', air will enter the slit nozzle (3), resulting in a discontinuous and intermittent water flow in the width direction of the plate, which will hinder uniform cooling. .

ところで、従来よ１″採珀）さ□れているスリットノズ
ル（３）は、第３−に示＋よう゛に高さ方向直線部のス
リット間隔比、すなわち入口のスリット間隔をａ、出口
のスリット間隔をｂとした場合ａ／ｂ　は通常は１．０
、大きく壊てもＬ５程度であるため、低流量域で切れ目
のない安定した板状水流を得るためにはスリット間隔の
小さいノズル（３）を採用する必要があるが、厚鋼板（
１）のオンライン冷却制御に用いられるスリットノズル
（３）の幅数）は約５ｍ。By the way, the slit nozzle (3), which is conventionally 1" in diameter, has a slit interval ratio in the straight section in the height direction, that is, a slit interval at the inlet, and a slit interval at the outlet, as shown in No. 3-3. If the slit interval is b, a/b is usually 1.0
, even if it breaks significantly, it will only be about L5, so in order to obtain a stable plate-like water flow without breaks in the low flow rate range, it is necessary to use a nozzle (3) with a small slit interval.
The width of the slit nozzle (3) used for online cooling control in step 1) is approximately 5 m.

ノズル長（４）は約１ｍ近に７もあシ、これを鋼板で精
度良く製作することは非常に困難であると共に費用もか
かることになる。The nozzle length (4) is approximately 1 m long and has 7 recesses, and it is extremely difficult and expensive to manufacture this with precision from a steel plate.

（発明の目的） 本発明は上記問題点に鑑みて成されたものであシ、ノズ
ル出口のスリット間隔を小さくせずに可及的に下限界流
量を引下げることができる高温鋼材の冷却用スリットノ
ズルを提供せんとするものである。(Object of the Invention) The present invention has been made in view of the above-mentioned problems.It is used for cooling high-temperature steel materials, and is capable of lowering the lower limit flow rate as much as possible without reducing the slit interval at the nozzle outlet. It is intended to provide a slit nozzle.

すなワチ、スリットノズルの流量の下限界はスリットノ
ズル出口部においてスリット内に空気が入シ込む量によ
って決定される。従ってこの空気の入シ込みを防止する
には高さ方向にスリット間隔の広がっている形状が効果
的であると考え、本発明者が種々実験・研究した結果、
以下に示す構成のスリットノズルが下限界流量を大幅に
引下げ得ることを見い出した。In other words, the lower limit of the flow rate of the slit nozzle is determined by the amount of air that enters the slit at the slit nozzle outlet. Therefore, in order to prevent this air from entering, we believe that a shape in which the slit spacing is widened in the height direction is effective, and as a result of various experiments and research, the present inventors found that
It has been found that the slit nozzle having the configuration shown below can significantly lower the lower limit flow rate.

（発明の構成） 本発明は、冷却すべき高温鋼材の搬送方向と略直角に配
置されて上記高温鋼材に板状水流を流下せしめる冷却用
スリットノズルにおいて、上記スリットノズルの入口ス
リット間隔を出口スリット間隔の３倍以上とし、かつ上
記人口スリットと出口スリット間がテーパ面となるよう
にしたことを要旨とする高温鋼材の冷却用スリットノズ
ルである。(Structure of the Invention) The present invention provides a cooling slit nozzle that is arranged substantially perpendicular to the conveying direction of high-temperature steel material to be cooled and allows a plate-shaped water flow to flow down the high-temperature steel material, with the interval between the inlet slits of the slit nozzle being equal to the distance between the inlet slits and the outlet slit. This is a slit nozzle for cooling high-temperature steel materials, the gist of which is that the interval is three times or more, and the space between the artificial slit and the exit slit is a tapered surface.

上記入口スリット間隔を出口スリット間隔の３倍以上と
した理由は、本発明者がノズル幅副が４７５０鴎、ノズ
ル長（／、）が４００ｍｍおよび９００　ｗｍ”のスリ
ットノズルにおいて、その出口スリット間隔を９〜１３
ｍの５種類について入口スリット間隔と出口スリット間
隔の比と、下限界流量引下げ率（スリットノズルから流
下する板状水流に膜切れが発生しない最大絞１率）との
関係を実験した結果（第４図）によるものである。なお
、ノズル長（４）が変わっても同様の効果があることを
実験で確認している。The reason why the above-mentioned inlet slit interval is set to be three times or more than the outlet slit interval is that the present inventor set the outlet slit interval in a slit nozzle with a nozzle width of 4750 mm and a nozzle length of 400 mm and 900 wm. 9-13
The results of an experiment on the relationship between the ratio of the inlet slit spacing to the outlet slit spacing and the lower limit flow rate reduction rate (the maximum throttling rate at which film breakage does not occur in the plate-shaped water flow flowing down from the slit nozzle) for five types of m. Figure 4). It has been confirmed through experiments that the same effect can be obtained even if the nozzle length (4) is changed.

Ｃ実施例） 以下本発明を第５図以降の添付図面に基づいて説明する
。C Embodiment) The present invention will be described below based on the attached drawings from FIG. 5 onwards.

図面において、（４）は冷却すべき厚鋼板（１）の幅方
向全域に亘る長さを有する水槽であυ、その底面には長
手方向に所要幅の排水口が設けられている。In the drawing, (4) is a water tank having a length extending over the entire width of the thick steel plate (1) to be cooled, and a drainage port having a required width in the longitudinal direction is provided on the bottom surface of the water tank.

（５）は上記水槽（４）内に挿入された給水管、（６）
は該給水管（５）と上記排水口間に介装された整流板で
あシ、これら給水管（６）と整流板（６）には夫々多数
の水流出孔（γ）が開設されている。(5) is a water supply pipe inserted into the water tank (4), (6)
is a current plate interposed between the water supply pipe (5) and the drain port, and a large number of water outflow holes (γ) are provided in each of the water supply pipe (6) and the current plate (6). There is.

（８）は上記した水槽（４）の底面排水口に接続される
本発明に係るノズルであわ、該ノズル（８）は上記排水
口側の入口スリット間隔（ａ）を出口スリット間隔（ｂ
）の３倍以上とし、かつこれらスリット間がテーパ面と
なるように形成されている。(8) is a nozzle according to the present invention that is connected to the bottom drain port of the water tank (4), and the nozzle (8) is configured to change the inlet slit interval (a) on the drain port side to the outlet slit interval (b).
), and the space between these slits is formed into a tapered surface.

すなわち、給水管（５）の水流出孔（７）よシ水槽（４
）内に供給された冷却水は整流板（６）の作用によシ円
滑にノズル（８）に流れ、かつ先に述べた如くノズル（
８）を形成することによシ冷却水流量を絞った場合でも
出口スリットよシ空気が入シ込まず−ノズル（８）出口
スリットより切れ目のない板状水流となって高温の厚鋼
板（１）上に流下し、これを冷却するのである。In other words, from the water outlet hole (7) of the water supply pipe (5) to the water tank (4)
) The cooling water supplied into the nozzle ( ) smoothly flows to the nozzle (8) by the action of the rectifying plate (6), and as mentioned earlier, the cooling water flows smoothly into the nozzle (8).
By forming a nozzle (8), even when the cooling water flow rate is reduced, air does not enter through the outlet slit. ) and cools it.

（実験結果） ノズル幅−が４７５０ｍ＋＋、ノズル長（２）が９００
露、入口スリット間隔（ａ）が４０ｍ、出口スリット間
隔（ｂ）が１０ｍｍの本発明に係るスリットノズル（８
）を先に説明した水槽（４）に接続し、これを６基通′
板方向に直列配置して高温の厚鋼板（１）を冷却し、冷
却完了後の板幅方向温度分布を測定した結果、第６図に
示す如く均一となシ良好な結果が得られた。(Experimental results) Nozzle width - 4750m++, nozzle length (2) 900m
A slit nozzle according to the present invention (8
) to the water tank (4) explained earlier, and connect this to the 6 tanks'
The hot thick steel plates (1) were cooled by being arranged in series in the plate direction, and the temperature distribution in the plate width direction after cooling was completed. As a result, uniform and good results were obtained as shown in FIG.

Ｃ発明の効果） 以上述べた如く本発明によれば、ノズル出口のスリット
間隔を小さくせずに下限界流量を引下げることができる
為、高温鋼材を均一に冷却でき、更にスリットノズルの
製作が容易かつ安価に行なえる大なる効果を有する なお、本突施例ではスリットノズルは、幅方向に同一の
スリット間隔を有するものについて説明したが何等これ
に限るものではなく、ノズルの幅方向中央部と両端部に
おいてスリット間隔を変える等の設計変更は任意である
。C) Effects of the Invention As described above, according to the present invention, the lower limit flow rate can be lowered without reducing the slit interval at the nozzle outlet, so high-temperature steel can be uniformly cooled, and the slit nozzle can be manufactured more easily. Although the slit nozzle in this project example has the same slit interval in the width direction, the present invention is not limited to this, and Design changes such as changing the slit spacing at both ends are optional.

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

第１図はスリットノズルを用いたうξナーフロー冷却を
示す説明図、第２図はノズル出口のスリット間隔と下限
界流量の関係図、第３図は従来のスリットノズル断面図
、第４図はスリット間隔比と下限流引下げ率との関係図
、第５図は本発明に係るスリットノズルとこれを接続す
る水槽を示す断面図、第６図は本発明に係るスリットノ
ズルを採用した場合の板幅方向の温度分布を示す図面で
ある。 （１＞は高温の厚鋼板、（２）は板状水流、（４）は水
槽、（５）は給水管、（６）は整流板、（８）はスリッ
トノズル、ａ）は入口スリット間隔、（ｂ）は出口スリ
ット間隔。 ！２図 ノス゛ル戴口のスリーｚ［１％　（喚気）？・［ ２８′＜ □ 一友Ｕ鳴方向−す 手続補正書（自発） 昭和５９年４月２３日 特許庁長官　殿　ふ １、事件の表示 特願昭５８−２４２７４０号 ２、発明の名称 高温鋼材の冷却用スリットノズル ３、補正をする者 事件との関係　出願人 住　所　大阪府大阪市東区北浜５丁目１５番地氏名（ｆ
Ｊ）　（２１１）　住友金属工業株式会社４、代　理　
人 図　面Ｃ第７図） ７、補正の内容　別紙の通り （１）０本願発明明細書縞６頁第７行目に「ある。」と
ある記載の後に下記の字句を加入補正する。 記 ［また、第７図は他の実施例を示すもので、第７図に示
すように水槽（４１１Ｃ中間ノズル（９）全取付けるト
共に、その下部にスリットノズル（８）を接続し、該ス
リットノズル（８）の入口スリット間隔（ａ）を出口ス
リット間隔（ｂ）の３倍以上とし、かつ上記入口スリッ
トと出口スリット間がテーバ面よヶ、よ靴、も同様。効
果７、得ら。るユとは勿論である。」 （２）、同書第７頁第１５行目に、「・・・示す図面で
」とある記載を、「・・・示す図面、鎖７図は本発明の
他の実施例を示す断面図で」と補正する。 （３）、同書添付図面Ｃ第１図〜第６図）に第７図を追
加補正する。 ＆添付書類の目録 （１）、追加補正する第７図　１通 第７ す ≦ 与 ４Figure 1 is an explanatory diagram showing ξner flow cooling using a slit nozzle, Figure 2 is a diagram showing the relationship between the slit interval at the nozzle outlet and the lower limit flow rate, Figure 3 is a cross-sectional view of a conventional slit nozzle, and Figure 4 is A diagram of the relationship between the slit spacing ratio and the lower limit flow reduction rate, FIG. 5 is a sectional view showing the slit nozzle according to the present invention and a water tank connecting it, and FIG. 6 is a plate when the slit nozzle according to the present invention is adopted. It is a drawing which shows the temperature distribution in the width direction. (1> is a high temperature thick steel plate, (2) is a plate water stream, (4) is a water tank, (5) is a water supply pipe, (6) is a rectifier plate, (8) is a slit nozzle, a) is the inlet slit interval , (b) is the exit slit interval. ! Figure 2 Nozuru's mouth three-z [1% (exhalation)?・ [ 28' Relationship between the cooling slit nozzle 3 and the amendment case Applicant Address 5-15 Kitahama, Higashi-ku, Osaka-shi, Osaka Name (f
J) (211) Sumitomo Metal Industries, Ltd. 4, Agent
7. Contents of the amendment As shown in the attached sheet (1) 0 The following words and phrases are added after the statement "Aru" in the 7th line of page 6 of the specification of the claimed invention. [Also, Fig. 7 shows another embodiment, in which a water tank (411C intermediate nozzle (9) is fully installed and a slit nozzle (8) is connected to the lower part thereof, as shown in Fig. 7). The same applies if the inlet slit interval (a) of the slit nozzle (8) is at least three times the outlet slit interval (b), and the space between the inlet slit and the outlet slit is a tapered surface. (2) On page 7, line 15 of the same book, the statement ``In the drawings shown...'' was changed to ``The drawings shown and the chain diagram 7 are the invention of the present invention. (3) Figure 7 is added to Figures 1 to 6 of the accompanying drawing C of the same book. & List of attached documents (1), additionally amended Figure 7

Claims (1)

【特許請求の範囲】[Claims] （１）　冷却すべき高温鋼材の搬送方向と略直角に配置
されて上記高温鋼材に板状水流を流下せしめる冷却用ス
リットノズルにおいて、上記スリットノズルの入口スリ
ット間隔を出口スリット間隔の３倍以上とし、かつ上記
入口スリットと出口スリット間がテーパ面となるように
したことを特徴とする高温鋼材の冷却用スリットノズル
。(1) In a cooling slit nozzle that is arranged substantially perpendicular to the conveying direction of the high-temperature steel material to be cooled and allows a plate-shaped water stream to flow down the high-temperature steel material, the inlet slit interval of the slit nozzle is at least three times the outlet slit interval. , and a slit nozzle for cooling high-temperature steel material, characterized in that the space between the inlet slit and the outlet slit is a tapered surface.
JP24274083A 1983-12-21 1983-12-21 Slit nozzle for cooling high temperature steel material Granted JPS60133911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24274083A JPS60133911A (en) 1983-12-21 1983-12-21 Slit nozzle for cooling high temperature steel material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24274083A JPS60133911A (en) 1983-12-21 1983-12-21 Slit nozzle for cooling high temperature steel material

Publications (2)

Publication Number Publication Date
JPS60133911A true JPS60133911A (en) 1985-07-17
JPS6359762B2 JPS6359762B2 (en) 1988-11-21

Family

ID=17093545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24274083A Granted JPS60133911A (en) 1983-12-21 1983-12-21 Slit nozzle for cooling high temperature steel material

Country Status (1)

Country Link
JP (1) JPS60133911A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007037591A (en) * 2005-07-29 2007-02-15 Bambi:Kk Fixing structure of band and watch band, band member and wrist-watch provided with it
EP1776483A1 (en) * 2004-06-30 2007-04-25 Posco Hot rolled strip cooling device with coolant header
US7690215B2 (en) 2004-03-29 2010-04-06 Sms Siemag Aktiengesellschaft Device for cooling metal sheets and strips
JP2010105002A (en) * 2008-10-29 2010-05-13 Sumitomo Metal Ind Ltd Header, cooling device, and method for manufacturing steel sheet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7690215B2 (en) 2004-03-29 2010-04-06 Sms Siemag Aktiengesellschaft Device for cooling metal sheets and strips
EP1776483A1 (en) * 2004-06-30 2007-04-25 Posco Hot rolled strip cooling device with coolant header
EP1776483A4 (en) * 2004-06-30 2009-12-02 Posco Hot rolled strip cooling device with coolant header
JP2007037591A (en) * 2005-07-29 2007-02-15 Bambi:Kk Fixing structure of band and watch band, band member and wrist-watch provided with it
JP2010105002A (en) * 2008-10-29 2010-05-13 Sumitomo Metal Ind Ltd Header, cooling device, and method for manufacturing steel sheet

Also Published As

Publication number Publication date
JPS6359762B2 (en) 1988-11-21

Similar Documents

Publication Publication Date Title
JPS60133911A (en) Slit nozzle for cooling high temperature steel material
KR19990063969A (en) Float glass manufacturing apparatus and method
RU2008123868A (en) TWO-ROLL CASTING MACHINE, AND ALSO MEANS AND METHOD FOR ITS OPERATION
CZ9902891A3 (en) Teeming nozzle for supplying molten metal to crystallizing tank of apparatus for continuous casting
JPS6314053B2 (en)
US3625498A (en) Cooling apparatus for continuous casting plants
JP3615437B2 (en) Slide valve device
CN108180779A (en) Structure at a kind of printed circuit board heat exchanger entrance shunting
JPS6068107A (en) Method and device for cooling hot rolled steel sheet
JPS5886904A (en) Quick cooler for steel plate in hot rolling installation for thick plate
EP2111316B1 (en) A submerged entry nozzle
JPH0354185B2 (en)
KR20210001523A (en) Apparatus and method for manufacturing float glass
JPS60216956A (en) Continuous casting machine for thin sheet
JPS6040588Y2 (en) Cooling system
JPS61229414A (en) Slit lamina cooling device for hot rolled steel sheet
JPS634026A (en) Method for cooling metallic strip
JPH10291018A (en) Method for cooling high-temperature steel sheet and device for cooling high-temperature steel sheet
JPH0920932A (en) Slip laminar cooling device
JPS60234716A (en) Header for steel plate cooling device
KR20240034747A (en) immersion nozzle
JPH0839126A (en) Slit laminar flow cooling equipment
JPS6050122A (en) Cooling method of high temperature steel sheet
JPH0663456A (en) Liquid supply nozzle
JPS6118025Y2 (en)

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term