Effects of oxidation and surface roughening on drawing limit in dieless drawing process of SUS304 stainless steel microtubes

Imagawa, Yusuke; Manabe, Ken‐ichi; Sakai, Takashi

doi:10.1016/j.jmatprotec.2015.03.033

Cited by 20 publications

(10 citation statements)

References 26 publications

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“…In this case, the surface roughness of the formed micro-tubes did not change significantly during forming [32]. For the drawing of stainless-steel micro-tubes in the temperature range of 950 to 1100 °C in argon atmosphere and atmospheric oxygen, respectively, it was found that the oxidation and surface roughening affected the drawing limit and varied widely, depending on the temperature [24]. a all processes conduced at room temperature.…”

Section: Dieless Drawingmentioning

confidence: 77%

“…Recent developments in the fabrication of micro-tubes aim in particular to provide improved semi-finished products, with more economic manufacturing processes, for use in microsystem-based applications of medical engineering and microfluidics for heat exchangers. When primarily considering the fabrication of seamless metallic tubes, the investigated technologies can be divided into (a) dieless drawing techniques [5,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], (b) process chains, applying scaled-down and partly modified tube drawing [36][37][38][39][40][41][42][43][44][45][46][47], and (c) manufacturing techniques of grooved micro-tubes for applications in heat exchange [43,[48][49][50][51][52][53][54]. Apart from this research into tube manufacturing processes, notable progress was also achieved in the design of the process and tools for the profile extrusion of tubular micro-profiles with a number of channels [55][56][57][58][59].…”

Section: Micro-tube Fabricationmentioning

confidence: 99%

“…Due to the fact that dieless drawing is conducted without rigid forming dies, difficulties in the fabrication and handling of scaled-down drawing dies and the influences of size effects in friction can be avoided [34]. As an advantage of size effects, it can be expected that the increase in heating and cooling rates at the microscale will lead to an increase in feasible drawing speeds for dieless micro-tube drawing [24,33].…”

Section: Dieless Drawingmentioning

confidence: 99%

See 2 more Smart Citations

Review on Advances in Metal Micro-Tube Forming

Hartl

2019

Metals

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Metallic tubular micro-components play an important role in a broad range of products, from industrial microsystem technology, such as medical engineering, electronics and optoelectronics, to sensor technology or microfluidics. The demand for such components is increasing, and forming processes can present a number of advantages for industrial manufacturing. These include, for example, a high productivity, enhanced shaping possibilities, applicability of a wide spectrum of materials and the possibility to produce parts with a high stiffness and strength. However, certain difficulties arise as a result of scaling down conventional tube forming processes to the microscale. These include not only the influence of the known size effects on material and friction behavior, but also constraints in the feasible miniaturization of forming tools. Extensive research work has been conducted over the past few years on micro-tube forming techniques, which deal with the development of novel and optimized processes, to counteract these restrictions. This paper reviews the relevant advances in micro-tube fabrication and shaping. A particular focus is enhancement in forming possibilities, accuracy and obtained component characteristics, presented in the reviewed research work. Furthermore, achievements in severe plastic deformation for micro-tube generation and in micro-tube testing methods are discussed.

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Section: Dieless Drawingmentioning

confidence: 77%

Section: Micro-tube Fabricationmentioning

confidence: 99%

Section: Dieless Drawingmentioning

confidence: 99%

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Review on Advances in Metal Micro-Tube Forming

Hartl

2019

Metals

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“…Therefore, high-speed drawing can be realized for microtube dieless drawing. Furushima et al [10] investigated the effects of surface roughening and oxidation on the drawing limit in dieless drawing of SUS304 stainless steel microtubes. They found that the limiting area reduction increases to a maximal value and then decreases with heating temperatures in both air and argon gas.…”

Section: Introductionmentioning

confidence: 99%

Formability Analysis and Oxidation Layer Effects in Dieless Drawing of Stainless Steel Wires

Hwang

Liu

2019

Metals

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In this study, dieless drawing experiments of stainless steel SUS304 wires of 1 mm in diameter were carried out using a self-developed dieless drawing machine. In order to prevent oxidation, argon gas was applied to a self-designed chamber during dieless drawing processes. The effects of the forming temperature and the oxide layer on the mechanical properties of the drawn SUS304 stainless wires obtained by tensile tests are discussed in this paper. A finite element model considering the high frequency induction heating mode in the finite element software DEFORM2D was developed to conduct the heat transfer analysis and the formability analysis of the drawn products in dieless drawing of stainless steel wires. The effects of the drawing speed and forming temperature on the maximal reachable area reductions are discussed. Through the comparisons of the maximal reachable area reduction between the finite element simulations and experiments, the finite element modelling for dieless drawing processes was validated.

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“…Furushima et al [2] studied the effects of oxidation and surface roughening on limiting drawing ratio (LDR) in dieless drawing process of austenitic stainless steel 304. It was found that the LDR in dieless drawing strongly depends on heating temperature.…”

Section: Introductionmentioning

confidence: 99%

Study on micro hydro-mechanical deep drawing using finite element method

Zhao

et al. 2016

MATEC Web Conf.

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Abstract. A numerical model was established to investigate the micro hydro-mechanical deep drawing process of austenitic stainless steel 304 foil (0.05 mm thickness). Due to the miniaturisation of the specimen size, the effect of grain size, gap distance and radial pressure during drawing process could be prominent. The results indicate that the appropriate radial pressure and gap distance could improve the limit drawing ratio (LDR) of manufactured cylindrical cups by reducing the friction resistance. The maximum LDR obtained in the present work reaches 3.2, which is much higher than that obtained by conventional deep drawing process.

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Effects of oxidation and surface roughening on drawing limit in dieless drawing process of SUS304 stainless steel microtubes

Cited by 20 publications

References 26 publications

Review on Advances in Metal Micro-Tube Forming

Review on Advances in Metal Micro-Tube Forming

Formability Analysis and Oxidation Layer Effects in Dieless Drawing of Stainless Steel Wires

Study on micro hydro-mechanical deep drawing using finite element method

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