scholarly journals Deep Drawing of Thin Stainless Steel Sheets Using Diamond Tools without Lubricant

2012 ◽  
Vol 53 (612) ◽  
pp. 74-78
Author(s):  
Nobuhiro KOGA ◽  
Kazuki USU ◽  
Changlong XU
Keyword(s):  
Stainless Steel ◽  
Deep Drawing ◽  
Diamond Tools ◽  
Steel Sheets

scholarly journals Influencia de la anisotropia en la formabilidad de acero inoxidable 439

2019 ◽  
pp. 1-8
Author(s):  
Juan Manuel Salgado-Lopez ◽  
José Luis Ojeda-Elizarrarás ◽  
José Trinidad Pérez-Quiroz ◽  
Hector Javier Vergara-Hernández
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Deep Drawing ◽  
Metallographic Analysis ◽  
Quantitative Chemical Analysis ◽  
Normal Anisotropy ◽  
Automotive Components ◽  
Steel Sheets ◽  
R Value

This work shows the influence of the normal anisotropy (“r” value) in the deep drawing of AISI 439 ferritic stainless steel sheets. In order to do so, quantitative chemical analysis, metallographic analysis, tensile mechanical properties, and the determination of the “r” value and the “n” value were carried out in two different AISI 439 steel sheets of two different suppliers. In recent years, this ferritic stainless steel has been applied in a deep drawing process of automotive components. In this way, it must be said that one of these ferritic stainless steel sheets cracked due to exhaustion of formability during deep drawing after few steps. On the other hand, the second ferritic stainless steel sheet showed neither cracking nor other type of defects. The results of the tests, which were carried out in this work, probed that the“r” value has a strong influence on the forming behaviour of ferritic steel during deep drawing. This information is very relevant because the AISI 439 standard does not consider the planar anisotropy or the strain hardening coefficient as relevant for designation, but this type of steel is being applied in many forming operations of different components.

Experimental Determination of Heat Transfer Coefficients for Forming of Stainless Steel Sheets Considering Process Conditions and Deep-Drawing Film

2013 ◽  
Vol 554-557 ◽  
pp. 1501-1508 ◽  
Author(s):  
Philipp Schmid ◽  
Mathias Liewald
Keyword(s):  
Heat Transfer ◽  
Stainless Steel ◽  
Deep Drawing ◽  
Basic Knowledge ◽  
Process Conditions ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Steel Sheets ◽  
Forming Tools

Heat transfer coefficients are playing an important role in forming of metastable stainless steel sheets. Metastable austenitic stainless steels are highly influenced by heating of forming tools due to generation of latent heat during forming process. Strain-induced martensite formation and hence the TRIP-effect is directly coupled with the temperature development within forming tools as well as the temperature induced by heat controlled tools. Measurements of heat development in serial deep drawing processes are showing the need for an accurate determination of heat transfer coefficients considering actual process conditions. Heat transfer coefficients were determined with a simple and easy applicable measurement device for tool materials AMPCO 25 and cold work tool steel EN 1.2379 in combination with aluminum, austenitic EN 1.4301 and ferritic EN 1.4016 stainless steel grades. Special attention was paid to production-related individual influences such as surface conditions, lubrication and deep drawing film. Experiments were accomplished between 1-15 N/mm² showing high influence of intermediate media on heat transfer between forming tool and part and serve as boundary conditions for fully thermo-mechanical coupled forming simulations. A strong influence of deep drawing film, lubrication and surface pressure on heat exchange could be determined and this basic knowledge is seen as mandatory for dimensioning of heat controlled metal forming tools. Finally the experimental determined results are discussed and compared to common heat transfer models and similar experiments from literature.

scholarly journals Quantification of Ridging in Ferritic Stainless Steel Sheets by Electron Backscattered Diffraction R-Value Maps

2013 ◽  
Vol 19 (S5) ◽  
pp. 17-20 ◽  
Author(s):  
Kye-Man Lee ◽  
Jieon Park ◽  
Sangseok Kim ◽  
Sooho Park ◽  
Moo-Young Huh
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Deep Drawing ◽  
Surface Defects ◽  
Inhomogeneous Distribution ◽  
Electron Backscattered Diffraction ◽  
Steel Sheets ◽  
R Value ◽  
Individual Grains

AbstractIn ferritic stainless steel (FSS), undesirable surface defects of ridging appear during deep drawing. The formation of these defects is attributed to the inhomogeneous distribution of orientations of individual grains. In the present work, a new electron backscattered diffraction R(α)-value map was introduced, and the dependence of the tensile directions on the formation of ridging in an FSS sheet was discussed using this map. The results showed that large grain colonies in the R(α)-value maps lead to the formation of severe ridging in an FSS sheet.

Effect of Grain Size on Micro Deep Drawing of SUS304 Stainless Steel Square Cup

2015 ◽  
Vol 661 ◽  
pp. 77-82
Author(s):  
Chao Cheng Chang ◽  
Han Sheng Chen
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Deep Drawing ◽  
Side Length ◽  
Design Rules ◽  
Surface Textures ◽  
Steel Sheets ◽  
Sus304 Stainless Steel ◽  
Micro Deep Drawing

The study investigated the effect of grain size on the micro deep drawing of SUS304 stainless steel squares. Three stainless steel sheets with different thicknesses of 0.05 mm, 0.1 mm and 0.2 mm were treated by annealing processes at 1100 °C in which the holding times were varied in order to adjust the grain size. The sheets were used in the micro deep drawing processes for producing the square cups with 3 mm side length and 1.8 mm height. According to the design rules from references, the dimensions of the blank were determined to reduce the variation on the rim height of the square cup. The results showed that two peak values appeared on the load curves and the as-received sheet with the smallest grain size led to the largest load. Moreover, the cases of the as-received sheet with smaller grains had smoother surface textures than those of the annealed sheets with larger grains.

Effect of Deep Drawing and Subsequent Aging Condition on Delayed Cracking of Stainless Steel

1982 ◽  
Vol 68 (6) ◽  
pp. 649-657 ◽  
Author(s):  
Kiyohiko NOHARA ◽  
Kenji WATANABE ◽  
Yutaka ONO ◽  
Nobuo OHASHI
Keyword(s):  
Stainless Steel ◽  
Deep Drawing ◽  
Aging Condition ◽  
Subsequent Aging ◽  
Delayed Cracking

ALLEGHENY LUDLUM TYPE 305

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Work Hardening ◽  
Deep Drawing ◽  
Heat Treating ◽  
Cold Forming ◽  
Temperature Performance ◽  
Low Rate

Abstract Allegheny Ludlum Type 305 (S30500) stainless steel is used for applications requiring a low rate of work hardening during severe cold-forming operations such as deep drawing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-840. Producer or source: Allegheny Ludlum Corporation.

ALZ 305

Alloy Digest ◽  
1999 ◽  
Vol 48 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Deep Drawing ◽  
Heat Treating ◽  
Intermediate Annealing ◽  
Good Corrosion Resistance

Abstract ALZ 305 is an austenitic stainless steel with excellent formability and good corrosion resistance, toughness, and mechanical properties. The higher amount of nickel in this grade enables high deep-drawing deformation without intermediate annealing. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-762. Producer or source: ALZ nv.

Sign in / Sign up

Export Citation Format

Share Document