Automated Semi-Solid Forging of Steel Components by Means of Thixojoining

Baadjou, René; Shimahara, H.

doi:10.4028/3-908451-26-4.383

Cited by 7 publications

(13 citation statements)

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“…Contrast this with a search on the abstract keyword ''Forging'' where over 35 relevant theses will appear including studies on lubrication, wear and damage as well as 3D simulations. Similarly in the main sources (journals having an impact factor and rated conferences) a search using these keywords will result in few results, which are mainly concerned with kinematic modelling [4,5], often without real world data [6], discussions of potential applications [7], thixotropic forging studies [8] and the like. In contrast there has been relatively steady development by suppliers and manufacturers' websites often have useful reporting material, though discussions with robot suppliers (ABB/Fanuc) have revealed that there has been little application development of automation in forging, which reflects the lack of academic output.…”

Section: Introductionmentioning

confidence: 99%

A review of automation in manufacturing illustrated by a case study on mixed-mode hot forging

Harrison

2014

Manufacturing Rev.

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-This paper describes a review of automation techniques as currently practiced in the forging and forming industry. That industry has been relatively resistant to handling automation because of the severe challenges that are faced by having typically small batch sizes, extremely challenging operating conditions in terms of temperatures and pressures and lighting conditions. The paper discusses how aspects of these difficulties can be overcome and it is hoped that the specific solutions and methodology presented will find general applications in other aspects of manufacturing industry. The concept of the ''Automated Forging of the Future'' is introduced in which advanced handling, rapid tooling-change and flexibility, smart metrology, advanced sensing and intelligent gripping techniques are presented. The paper represents the distillation of work on automated forging based on the authors' implementation of a key theme in forging automation in Advanced Forming

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Section: Introductionmentioning

confidence: 99%

A review of automation in manufacturing illustrated by a case study on mixed-mode hot forging

Harrison

2014

Manufacturing Rev.

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“…In addition, a semi-solid join can be used to join a low melting point metal with a high melting point metal (Kiuchi, Yanagimoto, & Sugiyama, 1998;Ridha, Fonna, Huzni, Supardi, & Ariffin, 2013;Yusof, Jamaludin, Abdullah, Hanafi, & Zain, 2012). However, as reported in other studies, there are three possible methods to produce the thixojoining process: combining the forming and bonding as one step (Baadjou, Shimahara, & Hirt, 2006), using a thixotropic metal as the filler for joining materials (Mendez, Rice, & Brown, 2002), and joining two metals in a thixotropic property (Mohammed, Omar, Salleh, Zailani, & Alhawari, 2012). The aims of the present study were to investigate the prospect of joining D2 tool steel to AISI 304 stainless steel and to characterize the interfacial microstructure and metallurgical joints which are accomplished in this novel process.…”

Section: Introductionmentioning

confidence: 95%

Investigations on Thixojoining Process of Steel Components

Mohammed¹,

Omar²,

Syarif³

et al. 2013

J MECH ENG SCI

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A high quality joint between tool steel and stainless steel alloys is hard to achieve with the conventional welding process. In this study, a new process of joining semi-solid AISI D2 tool steel and AISI 304 stainless steel using a partial remelting method is proposed. Metallographic analysis and Vickers hardness tests were performed. The results obtained from investigating the basic geometries demonstrated a good joining quality that differs from the conventional process of welding or mechanical joining with screws or nails. Metallographic analyses along the joint interface between semi-solid AISI D2 and 304 stainless steel showed a smooth transition from one to the other, with neither oxides nor microcracking being observed. Local mechanical properties of different regions show three different readings according to the results of the hardness tests. The current work successfully confirmed that the avoidance of dendritic microstructure of the semi-solid joined zone and high bonding quality components can be achieved. From the present study, it can be said that the thixojoining process can be utilized safely for dissimilar metal pairs.

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“…Mechanical tests demonstrated a higher bonding strength with decreasing content of liquid phase fraction [1], which verifies a significant advantage compared to the compound casting technology with high liquid phase fraction. Also the feasibility of a joining semi-solid steel matrix with different steels and even lower melting materials like copper based alloys was shown in different research projects [4][5][6]. Figure 1 shows a steel component that contains a shaft made of steel (centre) and a bush made of copper alloy (circumferential in the lower part) [7].…”

Section: Introductionmentioning

confidence: 99%

Investigations on Semi‐solid Joined Steel Components and their Bonding Quality

Baadjou

Knauf

2010

steel research int.

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To characterise the bonding quality of semi-solid joined components, fundamental investigations were carried out by producing composite test specimens. By using steel as a semi-solid base matrix and different steel or copper alloys as inserted materials, an interesting field of material combinations was realised. Two different steel grades, the cold forming tool steel X210CrW12 and the bearing steel 100Cr6, were chosen as the material of the base matrix. Geometry variations were tested along with the variation of materials mentioned. The results supply information about the influence of the inserts shape on an early cooling of the base material during form filling or remelting of the insert caused by overheating. Qualitative and quantitative analyses of the mechanical characteristics of the bonding were carried out using mechanical tests. Metallographic analyses complete the description of the bonding mechanisms at the contact zone between the solidified matrix and the insert. The investigations on basic geometries show a good joining quality, which is mainly based on a strong force and form closure caused by contraction of the solidifying and cooling base matrix. In addition, material closure occurs in areas that are strongly heated during the joining process. These results provide key information for the design of prospective components of a new generation.

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Automated Semi-Solid Forging of Steel Components by Means of Thixojoining

Cited by 7 publications

References 0 publications

A review of automation in manufacturing illustrated by a case study on mixed-mode hot forging

A review of automation in manufacturing illustrated by a case study on mixed-mode hot forging

Investigations on Thixojoining Process of Steel Components

Investigations on Semi‐solid Joined Steel Components and their Bonding Quality

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