An overview of high thermal conductive hot press forming die material development

Bending behavior occurs in the hot press forming process, resulting in many cases of failure during forming. To address the problem of cracking and improve the formability and mechanical properties of boron steel sheets in the bending process, an experiment has been carried out by using a spring compound bending die. Also, a comparison has been made between the traditional U-bending die and the spring compound bending die with regard to formability. The influence of the parameters for hot press forming such as the heating temperature, punch speed, and die radii on the mechanical properties and microstructure was analyzed by tension testing and metallographic observations.

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Corrosion Assessment for Boron Steel Weldments Prepared by Overlap Welding and Successive Hot Press Forming Processes

Journal of Welding and Joining ◽

10.5781/jwj.2017.35.5.1 ◽

2017 ◽

Vol 35 (5) ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Minjung Kang ◽

Cheolhee Kim

Keyword(s):

Boron Steel ◽

Hot Press ◽

Press Forming ◽

Hot Press Forming ◽

Corrosion Assessment

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Microstructure and Mechanical Properties of Boron Sheet Metal Steels in Hot Press Forming Process With Nanofluid as a Coolant

Reference Module in Materials Science and Materials Engineering ◽

10.1016/b978-0-12-815732-9.00142-x ◽

2021 ◽

Author(s):

Ahmad R. Yusoff ◽

Syh K. Lim ◽

Mohamad Ramadan

Keyword(s):

Mechanical Properties ◽

Sheet Metal ◽

Hot Press ◽

Forming Process ◽

Press Forming ◽

Microstructure And Mechanical Properties ◽

Hot Press Forming

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Study on Hot Press Forming Process of Large Curvilinear Generatrix Workpiece of Ti55 High-Temperature Titanium Alloy

Metals ◽

10.3390/met8100827 ◽

2018 ◽

Vol 8 (10) ◽

pp. 827 ◽

Cited By ~ 1

Author(s):

Fengyong Wu ◽

Wenchen Xu ◽

Zhongze Yang ◽

Bin Guo ◽

Debin Shan

Keyword(s):

Titanium Alloy ◽

High Temperature ◽

Fem Simulation ◽

Alloy Sheet ◽

Rolled Sheet ◽

Strain Rates ◽

Hot Press ◽

Forming Process ◽

Press Forming ◽

Hot Press Forming

In order to manufacture complex curvilinear generatrix workpieces of high-temperature titanium alloy, the hot tensile behavior of Ti55 alloy sheet was tested and the hot press forming process was investigated using Finite Element Method (FEM) simulation and experiment. The hot tensile experiments of Ti55 rolled sheet were conducted at the temperatures of 800–900 °C with the strain rates of 0.001–0.1 s−1. According to the results of hot tensile tests and microstructure evolution, the proper hot press forming parameters were determined as the temperature of 850 °C and the strain rates of 0.001–0.01 s−1. The wrinkling mechanism in the transition region was analyzed and the initial blank sheet geometry was optimized by FE simulation of hot press forming. The two-step hot press forming process was better to produce the complex sheet workpiece of Ti55 alloy than the one-step hot forming scheme, which could restrain the wrinkling trend and ensure the microstructure and mechanical properties of the hot formed workpieces.

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Fabrication of Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.760 ◽

2010 ◽

Vol 447-448 ◽

pp. 760-764 ◽

Cited By ~ 3

Author(s):

Keiji Ogawa ◽

Toshiki Hirogaki ◽

Eiichi Aoyama ◽

Mitsuaki Taniguchi ◽

Sachiko Ogawa

Keyword(s):

Present Report ◽

Bamboo Fiber ◽

Hot Press ◽

Green Composite ◽

Forming Process ◽

Machining Center ◽

Press Forming ◽

Hot Press Forming ◽

Binder Free ◽

Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we proposed a sustainable manufacturing system using bamboo. An extraction method of bamboo fibers end-milled using a machining center with in-situ measurement is proposed. Bamboo fibers with high precision shape are efficiently acquired. In the present report, we propose the fabrication of binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper forming conditions to optimize the forming process. We also made various three-dimensional shapes considering the practical applications of the formed binder-free bamboo fiber moldings.

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Hardness Prediction of Tailor Rolled Blank in Hot Press Forming Using Quench Factor Analysis

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.729.110 ◽

2017 ◽

Vol 729 ◽

pp. 110-114

Author(s):

Jae Hong Kim ◽

Dae Cheol Ko ◽

Byung Min Kim

Keyword(s):

Factor Analysis ◽

Fe Simulation ◽

Boron Steel ◽

Rear Side ◽

Cooling Curves ◽

Hot Press ◽

Tailor Rolled Blank ◽

Side Member ◽

Press Forming ◽

Hot Press Forming

This paper aims to predict the hardness of hot formed part for tailor rolled blank (TRB) by the FE-simulation coupled with quenching factor analysis (QFA). Dilatometry test of boron steel is performed at various range of cooling rates from 0.2 to 100°C/s using the dilatometer with forced air cooling system. The dilatometry test provides a hardness data according to cooling curves which are used to determine the material constants (K1~K5) of QFA and the time‒temperature‒property (TTP) diagram of boron steel. Then, FE‒simulation of hot press forming is conducted to predict the cooling curves of hot formed TRB part with a thickness combination of thicker 1.6mm and thinner 1.2mm which is called as rear side member of automotive component. The cooling curves of FE-simulation are applied to predict the hardness of hot formed rear side member using the QFA. Also, experiment of hot press forming is performed to verify the predicted results and to examine the effect of cooling curves on the hardness.

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