JP5737193B2 - 加工割れ感受性評価方法 - Google Patents
加工割れ感受性評価方法 Download PDFInfo
- Publication number
- JP5737193B2 JP5737193B2 JP2012001643A JP2012001643A JP5737193B2 JP 5737193 B2 JP5737193 B2 JP 5737193B2 JP 2012001643 A JP2012001643 A JP 2012001643A JP 2012001643 A JP2012001643 A JP 2012001643A JP 5737193 B2 JP5737193 B2 JP 5737193B2
- Authority
- JP
- Japan
- Prior art keywords
- steel bar
- test
- hollow
- specimen
- diameter
- 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 - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Forging (AREA)
Description
限界へん平率εhi=(h0−hi)/h0×100(%)
ここで、h0は最初の中空試験体の高さ(外径)(mm)、hiは水平位置における外表層で割れが発生する時の高さ(mm)を意味する。
素材にはJIS S45C(0.46%C、0.26%Si、0.76%Mn、0.020%P、0.010%S)の45mmφ圧延材を用いた。素材の外表面の影響を調べるために、外表層の表面性状を変化させた圧延材を作製した。圧延材は、仕上圧延ロールを、a)新品、b)交換直前、c)その中間、と変えた場合の圧延材を用意した。そして、この圧延材に、軟質化処理として球状化焼鈍処理(740℃×7hr−徐冷)を施したものを供試材として、以下の実験を行った。
表1および表2の本発明例では、外表層は受け入れままで機械加工をせず、内径側及び長さ方向に機械加工を施し各種形状の中空試験体に加工した。
試験には最大負荷能力10000kNの油圧式プレスを用いた。いずれの試験条件においても、治具の圧下速度は50mm/s一定とした。
本発明例のへん平試験方法は次の通り実施した。
2端面拘束冶具
3圧縮された試験体
4割れ
Claims (4)
- 圧延したままの棒鋼素材を切断し、中央部をくり貫いた中空試験体を作製し、該中空試験体を鉛直の直径方向にへん平させた際のへん平体のへん平率と、該へん平体の水平位置における外表層での割れ発生状況との関係から、下記式に規定する限界へん平率を求め、圧延したままの棒鋼素材を切断して作製した円柱被加工棒鋼素材の冷間鍛造時の表面加工割れ性を、前記限界へん平率に基づいて評価することを特徴とする棒鋼表面の加工割れ感受性評価方法。
限界へん平率εhi=(h0−hi)/h0×100(%)
ここで、h0は最初の中空試験体の高さ(外径)(mm)、hiは水平位置における外表層で割れが発生する時の高さ(mm)を意味する。 - 前記中空試験体の外径D、内径dの関係が、d/D>0.5であることを特徴とする、請求項1に記載の棒鋼表面の加工割れ感受性評価方法。
- 前記中空試験体は外径D、長さLの圧延したままの棒鋼から、外径D、内径d、長さLの中空試験体に加工することを特徴とする、請求項1または2に記載の棒鋼表面の加工割れ感受性評価方法。
- 前記中空試験体は外径D、長さLの関係が、L/Dが0.5〜2であることを特徴とする、請求項1〜3のいずれかに記載の棒鋼表面の加工割れ感受性評価方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012001643A JP5737193B2 (ja) | 2012-01-06 | 2012-01-06 | 加工割れ感受性評価方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012001643A JP5737193B2 (ja) | 2012-01-06 | 2012-01-06 | 加工割れ感受性評価方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013142559A JP2013142559A (ja) | 2013-07-22 |
JP5737193B2 true JP5737193B2 (ja) | 2015-06-17 |
Family
ID=49039199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012001643A Expired - Fee Related JP5737193B2 (ja) | 2012-01-06 | 2012-01-06 | 加工割れ感受性評価方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5737193B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5672215B2 (ja) * | 2011-11-11 | 2015-02-18 | 新日鐵住金株式会社 | 表面加工割れ感受性評価方法およびその装置 |
JP5672246B2 (ja) * | 2012-01-06 | 2015-02-18 | 新日鐵住金株式会社 | 加工割れ感受性評価方法 |
CN111855952B (zh) * | 2020-07-31 | 2022-10-28 | 山西北方机械制造有限责任公司 | 一种快速检验35#钢焊接性能的方法、装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10317054A (ja) * | 1997-03-14 | 1998-12-02 | Nippon Seiko Kk | 環状部材 |
JP4706183B2 (ja) * | 2004-05-07 | 2011-06-22 | 住友金属工業株式会社 | シームレス鋼管およびその製造方法 |
JP5503170B2 (ja) * | 2009-03-23 | 2014-05-28 | 株式会社神戸製鋼所 | 最大結晶粒の縮小化特性に優れた肌焼鋼 |
-
2012
- 2012-01-06 JP JP2012001643A patent/JP5737193B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2013142559A (ja) | 2013-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Tang et al. | Mechanical anisotropy and deep drawing behaviors of AZ31 magnesium alloy sheets produced by unidirectional and cross rolling | |
Watts et al. | On the basic yield stress curve for a metal | |
JP5737193B2 (ja) | 加工割れ感受性評価方法 | |
Fakhar et al. | Significant improvements in mechanical properties of AA5083 aluminum alloy using dual equal channel lateral extrusion | |
Sahli et al. | Modelling and numerical simulation of steel sheet fine blanking process | |
Wang et al. | A novel backward extrusion process through rotating die and open punch | |
JP5672215B2 (ja) | 表面加工割れ感受性評価方法およびその装置 | |
Wang et al. | Tensile deformation behaviors of pure nickel fine wire with a few grains across diameter | |
Elshalakany et al. | An experimental investigation of the formability of low carbon steel tailor-welded blanks of different thickness ratios | |
Bin et al. | Flow stress and tribology size effects in scaled down cylinder compression | |
Pater et al. | A new cross wedge rolling process for producing rail axles | |
JP5672246B2 (ja) | 加工割れ感受性評価方法 | |
Trzepiecinski | RESEARCH PAPER EFFECT OF THE PLASTIC STRAIN AND DRAWING QUALITY ON THE FRICTIONAL RESISTANCE OF STEEL SHEETS | |
RU2397475C1 (ru) | Способ определения эффективности смазочных материалов для листовой штамповки | |
CN103103920A (zh) | 一种应用于悬索桥的调质索夹制造方法 | |
Kumari et al. | Deformation behavior and characterization of copper alloy in extrusion process | |
Vaidyanathan et al. | Deep Drawing of constrained groove pressed EDD steel sheets | |
Halaczek | Analysis of manufacturing bimetallic tubes by the cold drawing process | |
Trzepieciński et al. | Assessment of frictional performance of deep drawing quality steel sheets used in automotive industry | |
Karanjule et al. | Determination of the optimal reduction ratio for least springback during cold drawing of seamless tubes | |
CN113514332B (zh) | 一种拉拔线棒材抗切削开裂性的原料检测方法 | |
Abdel-Magied et al. | An investigation into deep drawing process without blank holder | |
Miłek et al. | The influence of relative rolling reduction of sheet metal on the changes of deep drawing forces in multi drawing steps for cylindrical drawpiece without collar made from EN AW-1050A aluminium | |
Karanjule et al. | Investigating Springback Of Seamless Tubes Cold Drawing Process Using Design Of Experiments (Doe) And Microstructural Investigations | |
Nikhare | Residual Formability of Single Point Incrementally Formed Part |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140212 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20141031 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20141104 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20141216 |
|
RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20150105 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150324 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150406 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 5737193 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |