scholarly journals Use of the Press Hardening Technology for Treatment of TRIP Steel

2018 ◽  
Vol 18 (2) ◽  
pp. 243-247
Author(s):  
Hana Jirková ◽  
Kateřina Opatová ◽  
Josef Káňa ◽  
Martin Bystrianský
Keyword(s):  
Trip Steel ◽  
Press Hardening ◽  
The Press

scholarly journals USE OF MULTI-PHASE TRIP STEEL FOR PRESS-HARDENING TECHNOLOGY

2019 ◽  
Vol 25 (2) ◽  
pp. 101 ◽  
Author(s):  
Hana Jirková ◽  
Kateřina Opatová ◽  
Štěpán Jeníček ◽  
Jiří Vrtáček ◽  
Ludmila Kučerová ◽  
...  
Keyword(s):  
Trip Steel ◽  
Physical Simulation ◽  
Isothermal Holding ◽  
High Strength Steels ◽  
High Strength ◽  
Press Hardening ◽  
Passenger Safety ◽  
Ultra High Strength Steels ◽  
New Treatments ◽  
Multi Phase

<p class="AMSmaintext">Development of high strength or even ultra-high strength steels is mainly driven by the automotive industry which strives to reduce the weight of individual parts, fuel consumption, and CO<sub>2</sub> emissions. Another important factor is to improve passenger safety. In order to achieve the required mechanical properties, it is necessary to use suitable heat treatment in addition to an appropriate alloying strategy. The main problem of these types of treatments is the isothermal holding step. For TRIP steels, the holding temperature lies in the field of bainitic transformation. These isothermal holds are economically demanding to perform in industrial conditions. Therefore new treatments without isothermal holds, which are possible to integrate directly into the production process, are searched. One way to produce high-strength sheet is the press-hardening technology. Physical simulation based on data from a real-world press-hardening process was tested on CMnSi TRIP steel. Mixed martensitic-bainitic structures with ferrite and retained austenite (RA) were obtained, having tensile strengths in excess of 1000 MPa.</p>

Heuristic-Based Evaluation of Energy Flows in Press Hardening Process Chains

2011 ◽  
Vol 473 ◽  
pp. 816-823 ◽  
Author(s):  
Reimund Neugebauer ◽  
Frank Schieck ◽  
Angela Göschel ◽  
Julia Schönherr
Keyword(s):  
Qualitative Evaluation ◽  
Resource Efficiency ◽  
Process Chain ◽  
Press Hardening ◽  
Whole Process ◽  
Quantitative Calculation ◽  
Hardening Process ◽  
Energy Flows ◽  
Process Chains ◽  
The Press

Energy and resource efficiency is a pressing issue for technological markets in the 21st century. In the field of production technology the development of energy and resource efficient processes and process chains is of particular importance. In order to meet these needs sustainable methods and standards have to be developed. This paper presents a new procedure to calculate and evaluate the energy and resource efficiency of process chains. The method consists of 4 stages that proceed from the real world to the quantitative calculation and qualitative evaluation of material and energy flows. The method is explained and validated using press hardening process chains as an example. The procedure enables the user to systematically capture and structure the press hardening process chain and subsequently develop a comprehensive model of the whole process chain. As a result, it allows to calculate the energy requirements for each stage of the process chain, and later on the process chain as a whole. The intention of the developed procedure is to provide a tool to detect the most energy efficient variant from a range of possible process chains.

Hot Stamping Technology Applied on Vehicles on EuroCarBody

2014 ◽  
Vol 1063 ◽  
pp. 232-236 ◽  
Author(s):  
Jia Zhou ◽  
Ming Tu Ma
Keyword(s):  
Joule Heating ◽  
Automotive Industry ◽  
New Technologies ◽  
Commercial Vehicle ◽  
State Of The Art ◽  
Hot Stamping ◽  
Tailor Rolled Blank ◽  
Press Hardening ◽  
The Press ◽  
Body In White

EuroCarBody, offer the most important forum for defining and discussing the state of the art in modern series car body engineering. The present paper concerns the materials of press hardened steels and its’ manufacturing technology (Hot stamping) applied on vehicle on EuroCarBody from 2009 to 2013 through presentations and benchmark datas. The using percentage of press hardening steels (PHS) on body in white (BIW) are summarized and analyzied. It can be noted that the number and weight of BIW parts using of press hardening steels are increasing from 2009 to 2013, some kind of vehicle, such as Audi A3, the using percentage of PHS reaches 21.6%. The press hardening steels have started used on commercial vehicle from EuroCarBody 2013. More and more new technologies applied on hot stamping processing, such as Joule heating for hot stamping, Hot-form-process partial tempering, Tailor Rolled Blank (TRB) technolgy, etc. With the developing of the automotive industry, more and more hot forming parts will be applied on vehicles in the future.

Design and Analysis of Hot Forming Parts with Extra Thick Specification

2021 ◽  
Vol 1026 ◽  
pp. 59-64
Author(s):  
Hong Liang Liu ◽  
Yu Chen ◽  
Chun Cheng Li ◽  
Lin Guan ◽  
Xiao Nan Wang
Keyword(s):  
Cooling Rate ◽  
Fatigue Test ◽  
Inner Core ◽  
Hot Forming ◽  
Analysis Method ◽  
Element Analysis ◽  
High Hardenability ◽  
Press Hardening ◽  
The Press ◽  
Press Hardening Steel

The press hardening steel with thick specification has been used as automobile chassis parts. With the increase of the thickness, the cooling rate of the inner core is lower in the conventional process, resulting in a poor harden ability, and the fatigue test is not qualified. In this study, the microstructure of hot forming parts with thick specifications was studied by means of metallographic and micro-hardness testing. The results show that there is a microstructure gradient in the thick hot forming parts, which leads to the uneven strength in the cross section and finally affects the fatigue test results.The finite element analysis method is used to study the cooling rate of the inner core of the hot forming parts. The high hardenability press hardening steel products has been prepared by adjusting the components.

scholarly journals Effect of molybdenum addition on hardenability of chromium-boron steels used for press hardening applications

2018 ◽  
Vol 54 (3) ◽  
pp. 339-347
Author(s):  
M. Deepa ◽  
G. Sahoo ◽  
S.K. Dhua
Keyword(s):  
Mechanical Properties ◽  
Processing Condition ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
Compression Tests ◽  
Press Hardening ◽  
Hardening Process ◽  
Microstructure And Mechanical Properties ◽  
The Press ◽  
Boron Steels

Two laboratory heats of low-Carbon low-alloy steels, one with boron and chromium additions and other with boron, chromium and molybdenum additions were made and cast into pencil ingots. These ingots were hot-rolled to 2 mm sheets suitable for press hardening application in an experimental rolling mill. A detailed study was made on the effect of various alloying elements on the microstructure and mechanical properties of these steels. A significantly higher hardness (~496 VHN), yield strength (~1137 MPa) and ultimate tensile strength (~1673 MPa) with comparable elongation (~6%) could be achieved in the as rolled and water-quenched Mo-Cr-B steel in comparison to Cr-B steel under similar processing condition. Moreover, a reduction of critical cooling rate by10?C/s was observed in this steel to obtain fully martensitic structure. The combined addition of boron, chromium and molybdenum was found to be more effective than that of boron and chromium in enhancing the microstructure and mechanical properties of boron-added steels. Additionally, a few hot compression tests were carried out to simulate the press hardening process of these experimental steels. It was found that one of the press hardening process parameters, viz., prior strain had a greater impact on the transformation behaviour of Cr-B and Mo-Cr-B steels during cooling.

Notch Shear Cutting of Press Hardened Steels

2015 ◽  
Vol 639 ◽  
pp. 477-484 ◽  
Author(s):  
Martin Feistle ◽  
Michael Krinninger ◽  
Roland Golle ◽  
Wolfram Volk
Keyword(s):  
Lightweight Design ◽  
High Energy ◽  
Component Reliability ◽  
Hardened Steels ◽  
Cycle Times ◽  
Press Hardening ◽  
Metal Thickness ◽  
The Press ◽  
High Energy Consumption ◽  
Interesting Alternative

Nowadays, lightweight design is a relevant issue in the automotive industry and in the field of electric mobility. The utilization of Press Hardened Components (PHC) made of manganese-boric steels enable weight saving through the reduction of the sheet metal thickness with sufficient component reliability. Because of the hard martensitic structure, by default, laser cutting is applied for piercing and trimming the contour after the Press Hardening Process (PHP). Due to the high energy consumption, in combination with long cycle times, this process is cost intensive.Instead of laser technology, shear cutting would be an interesting alternative for Press Hardened Steels (PHS) but this process poses substantial challenges for the industrial application. In order to cope with the difficulties of shear cutting operations of PHS, this work presents an alternative for processing PHS. This new method is called notch shear cutting.

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