JPS585964B2 - Manufacturing method of non-tempered H-beam steel for low temperature use - Google Patents
Manufacturing method of non-tempered H-beam steel for low temperature useInfo
- Publication number
- JPS585964B2 JPS585964B2 JP9756676A JP9756676A JPS585964B2 JP S585964 B2 JPS585964 B2 JP S585964B2 JP 9756676 A JP9756676 A JP 9756676A JP 9756676 A JP9756676 A JP 9756676A JP S585964 B2 JPS585964 B2 JP S585964B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- temperature
- beam steel
- manufacturing
- steel
- 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.)
- Expired
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Description
【発明の詳細な説明】
この発明は普通鋼を使用したＨ形鋼の製造にお．いて、
製造条件を特定することにより、従来製造されているＨ
形鋼の諸性質番改善し、低温用として用いられることを
可能にするＨ形鋼の製造方法に関する。[Detailed Description of the Invention] This invention is applicable to the production of H-beam steel using ordinary steel. There,
By specifying the manufacturing conditions, conventionally manufactured H
This invention relates to a method for manufacturing H-section steel that improves the properties of the section steel and enables it to be used for low-temperature applications.
すなわち、この発明法により得られたＨ形雫は，低温諸
性質としてＹＰ〉３５ｋ９／ｍｉ２、ＴＳ〉５０ｋｇ／
ｍｍ２、Ｅｌ〉２１チ、ｖＥ−４０〉４．０ｋｇ−ｍ，
ｖＥ−７０〉４．Ｏｋｇ−ｍを保証するものである。That is, the H-shaped drop obtained by the method of this invention has various low-temperature properties such as YP>35k9/mi2 and TS>50kg/mi2.
mm2, El〉21chi, vE-40〉4.0kg-m,
vE-70〉4. This guarantees Okg-m.
通常Ｈ形鋼は、素材を加熱後ブレークダウン圧延、粗圧
延、仕上圧延の工程を経て製造される。Usually, H-beam steel is manufactured by heating the material and then going through the steps of breakdown rolling, rough rolling, and finish rolling.
このうち仕上圧延は整形が目的であり、実質的圧延は他
の圧延工程で行なわれる。Among these, the purpose of finish rolling is shaping, and the actual rolling is performed in other rolling steps.
Ｈ形鋼の製造工程を詳細に述べると、一般に素材を１２
５０℃に加熱し、圧延比２，８〜３．２で１１００℃前
後でブレークダウン圧延を完了し、次いで圧延比３〜４
で９５０℃で粗圧延を終る。Describing the manufacturing process of H-beam steel in detail, the material is generally made of 12
Heating to 50°C, completing breakdown rolling at around 1100°C at a rolling ratio of 2.8-3.2, then rolling at a rolling ratio of 3-4.
Rough rolling is completed at 950°C.
ここで圧延比は義されるものである。The rolling ratio is defined here.
ところが従来の圧延によると得られたＨ形鋼が上記の低
温用として要求される諸性質を安定して満足しなかった
。However, the H-section steel obtained by conventional rolling did not consistently satisfy the various properties required for low-temperature use.
この発明は前記問題点を解決するため捉案されたもので
あり、熱処理を施しあるいは高価な合金成分を多量添加
することなく圧延を特定の条件のもとで行なうことによ
って、良好な低温靭性を有する低温用Ｈ形鋼を製造する
ことができる。This invention was devised to solve the above-mentioned problems, and it achieves good low-temperature toughness by rolling under specific conditions without heat treatment or adding large amounts of expensive alloying ingredients. It is possible to manufacture a low-temperature H-beam steel having the following characteristics.
すなわち、この発明は通常低温用として用いられるＣ：
０．０３〜０．１６係，Ｓｉ：０．３０〜０．５０％，
Ｍｎ：１．２５〜１．６０％，Ｐ：０．０３５％，Ｓ：
く０．０３５％，ｓｏｌＡｌ：０．０１０〜０．０５０
係および必要に応じてＶ，Ｎｂの１種または２種を０．
０２０〜０．０５０％含み、残部鉄および不可避的不純
物元素からなる鋼を、７５０〜９１０℃の温度条件で圧
延比２．５〜４．０の粗圧延を行なうことを特徴とする
ものである。That is, the present invention is applicable to C which is normally used for low temperature applications:
0.03~0.16 ratio, Si: 0.30~0.50%,
Mn: 1.25-1.60%, P: 0.035%, S:
0.035%, solAl: 0.010-0.050
0.1 or 2 of V and Nb as required.
The steel is characterized by rough rolling at a rolling ratio of 2.5 to 4.0 at a temperature of 750 to 910°C. .
この発明を実施例により詳細に説明すると、鋼塊を１１
２０℃程度に加熱し、デスケーラーによりスケールを除
去し、次いで孔型ロールにより圧延総パス回数が７〜１
１パス程度のリバース圧延をしながらブレークダウン圧
延する。To explain this invention in detail with reference to examples, a steel ingot of 11
Heating to about 20℃, removing scale with a descaler, then rolling with a grooved roll for a total number of passes of 7 to 1.
Breakdown rolling is performed while performing reverse rolling for about one pass.
続いてトランスファーに導く。Then lead to transfer.
ここでは材料温度は１０２０℃程度となる。Here, the material temperature is about 1020°C.
その後ユニバーサル圧延機およびエツジング圧延機によ
り粗圧延を行う。After that, rough rolling is performed using a universal rolling mill and an edging rolling mill.
そしてこの発明においては、この粗圧延を７５０〜９１
０℃の温度条件のもとに圧延比２．５〜４．０をもって
行うのである。In this invention, this rough rolling is performed at 750 to 91
It is carried out at a rolling ratio of 2.5 to 4.0 at a temperature of 0°C.
最後に仕上げユニバーサル圧延機により仕上圧延をして
製品を得る。Finally, finish rolling is performed using a finishing universal rolling mill to obtain a product.
ところで、この発明の実施は上記の如く粗圧延において
実施するのが現実的で適当であるが、ブレークダウン圧
延、粗圧延、仕上圧延の１工程あるいは２工程以上にわ
たって実施しても同様の製品が得られる。By the way, although it is practical and appropriate to carry out the present invention in rough rolling as described above, similar products may not be produced even if carried out in one or more steps of breakdown rolling, rough rolling, and finish rolling. can get.
この発明において、圧延温度が７５０℃未満であると圧
延組織が製品に残存して、伸びが悪くなる。In this invention, if the rolling temperature is less than 750°C, the rolled structure will remain in the product, resulting in poor elongation.
すなわち、再結晶しないのである。９１０℃を越すと、
再結晶が進み、結晶粒が粗大化し過ぎて靭性が悪くなる
。In other words, it does not recrystallize. When the temperature exceeds 910℃,
Recrystallization progresses, crystal grains become too coarse, and toughness deteriorates.
また圧延比が２．５未満であると、密な圧延組織が得ら
れず、靭性が充分確保されない圧延比４．９を越すと圧
延組織が製品に残存して伸びが悪くなり、靭性劣化をま
ねく。In addition, if the rolling ratio is less than 2.5, a dense rolled structure cannot be obtained and sufficient toughness cannot be obtained.If the rolling ratio exceeds 4.9, the rolled structure remains in the product, resulting in poor elongation and deterioration of toughness. Maneku.
ところで、この発明の方法が対象とする低温用Ｈ形鋼の
各成分組成の値を限定した理由は次の通りである。By the way, the reason why the values of each component composition of the low-temperature H-beam steel to which the method of the present invention is applied is limited is as follows.
Ｃが０．０３以下では強度が確保できず、０．１６以上
では靭性が劣化する。If C is 0.03 or less, strength cannot be ensured, and if C is 0.16 or more, toughness deteriorates.
Ｓｉが０．０３以下では強度の発現を望めず、０．５０
以上では靭性が劣化する。If Si is 0.03 or less, no strength can be expected to develop, and 0.50
Above that, the toughness deteriorates.
Ｍｎが１．２５以下では強度および靭性が小さく、１．
６０以上では接合部の靭性が低く、使用時溶接性が悪く
なる。If Mn is 1.25 or less, strength and toughness are low; 1.
If it is 60 or more, the toughness of the joint will be low and weldability during use will be poor.
ＰおよびＳが０．０３５以上では低温靭性が劣化する。If P and S are 0.035 or more, low temperature toughness deteriorates.
Ｎｂあるいは■の．一種又は二種の合計量が０．０２０
以下では強度の発現が望めず、０．０５０以上では靭性
が悪化する。Nb or ■. The total amount of one or two types is 0.020
If it is less than 0.050, no strength can be expected to develop, and if it is more than 0.050, toughness deteriorates.
ｓｏｌＡｌが０．０１０以下では脱酸が十分でなく、０
．０５０以上ではＡｌクラスターが増し鋼種の性状が悪
化する。When solAl is less than 0.010, deoxidation is not sufficient and 0.
．． If it is more than 050, Al clusters will increase and the properties of the steel will deteriorate.
このように、この発明によれば、製品を調質することな
く特定の条件のもとに圧延制御のみで低温用Ｈ形鋼を製
造できるので、高価な合金成分を含有する製品あるいは
調質品に比してきわめて安価に製造できる。As described above, according to the present invention, it is possible to manufacture H-beam steel for low temperature use only by rolling control under specific conditions without heat-refining the product. It can be manufactured very cheaply compared to
そして特に次述の実施例に示すように、調質せずして良
好な低温特性を有するＨ形鋼を得ることができたことは
実用価値がきわめて大である。In particular, as shown in the following examples, the fact that H-beam steel with good low-temperature properties could be obtained without heat refining is of great practical value.
次に実施例を示す。Next, examples will be shown.
実施例
この発明の方法と一般例との比較を行うために、成分組
成を変え圧延条件を変え、製品の機械的特性を調べた。EXAMPLE In order to compare the method of the present invention with a general example, the mechanical properties of the products were examined by changing the component composition and rolling conditions.
すなわち、この発明法の試料Ａ，ＢおよびＣと、比較例
の試料Ｄとについて、主として圧延温度を変えて、降伏
強度（ＹＰ）、引張強度（ＴＳ）、伸び率（ＥＡ）、０
℃における衝撃強度（ＶＥｏ）、遷移温度（ＶＴｓ）を
調べた結果を第１表に示す。That is, for Samples A, B, and C of the present invention method and Sample D of the comparative example, mainly by changing the rolling temperature, yield strength (YP), tensile strength (TS), elongation rate (EA), 0
Table 1 shows the results of examining impact strength (VEo) and transition temperature (VTs) at ℃.
特性を調べるための試験片は、フランジ端部からフラン
ジ巾の１／４の位置において圧延方向に沿って採取した
ものである。A test piece for examining the properties was taken along the rolling direction at a position 1/4 of the flange width from the flange end.
そしてＹＰ，ＴＳおよびＥｌはＪＩＳＺ２２４１により
、ＶＥｏ，ＶＴｓはＪＩＳ Ｚ２２４２に準じて測定し
たものである。YP, TS and El were measured according to JIS Z2241, and VEo and VTs were measured according to JIS Z2242.
この発明により得られたＨ形鋼はいずれも良好な特性を
示した。All of the H-beam steels obtained by this invention exhibited good properties.
Claims (1)
５０％，Ｍｎ：１．２５〜１．６０％，Ｐ：≦０．０３
５％，Ｓ＜０．０３５％，ｓｏｌＡｌ：０．０１０〜０
．０５０％および必要に応じてＶ，Ｎｂの１種または２
種を０．０２０〜０．０５０％含み、残部鉄および不可
避的不純物元素からなる鋼を、７５０〜９１０℃での圧
延比を２．５〜４．０で圧延することを特徴とする非調
質低温用Ｈ形鋼の製造方法。IC: 0.03-0.16, Si: 0.30-0.
50%, Mn: 1.25-1.60%, P:≦0.03
5%, S<0.035%, solAl: 0.010~0
．． 050% and one or two of V and Nb as necessary
A non-tempered steel characterized by rolling a steel containing 0.020 to 0.050% of seeds and the balance consisting of iron and unavoidable impurity elements at a temperature of 750 to 910°C and a rolling ratio of 2.5 to 4.0. A method for manufacturing H-beam steel for low-temperature use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9756676A JPS585964B2 (en) | 1976-08-16 | 1976-08-16 | Manufacturing method of non-tempered H-beam steel for low temperature use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9756676A JPS585964B2 (en) | 1976-08-16 | 1976-08-16 | Manufacturing method of non-tempered H-beam steel for low temperature use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5322853A JPS5322853A (en) | 1978-03-02 |
| JPS585964B2 true JPS585964B2 (en) | 1983-02-02 |
Family
ID=14195772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9756676A Expired JPS585964B2 (en) | 1976-08-16 | 1976-08-16 | Manufacturing method of non-tempered H-beam steel for low temperature use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS585964B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618562U (en) * | 1984-06-23 | 1986-01-18 | 大日本印刷株式会社 | static packaging |
| JPS6177370U (en) * | 1984-10-29 | 1986-05-24 | ||
| JPS61103360U (en) * | 1984-12-11 | 1986-07-01 | ||
| JPH0245175Y2 (en) * | 1984-01-20 | 1990-11-29 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61200421A (en) * | 1985-03-01 | 1986-09-05 | Mitsutoyo Mfg Co Ltd | Measuring machine |
| CN104018073B (en) * | 2014-06-19 | 2015-11-18 | 马钢(集团)控股有限公司 | A kind of low temperature resistant toughness H profile steel and production technique thereof |
| CN104018074B (en) * | 2014-06-19 | 2015-11-18 | 马钢(集团)控股有限公司 | A kind of low temperature resistant H profile steel and production technique thereof |
-
1976
- 1976-08-16 JP JP9756676A patent/JPS585964B2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0245175Y2 (en) * | 1984-01-20 | 1990-11-29 | ||
| JPS618562U (en) * | 1984-06-23 | 1986-01-18 | 大日本印刷株式会社 | static packaging |
| JPS6177370U (en) * | 1984-10-29 | 1986-05-24 | ||
| JPS61103360U (en) * | 1984-12-11 | 1986-07-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5322853A (en) | 1978-03-02 |
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