en sv fi en en en en ru cs da ar es sv ro el fa fr nl hu tr zh de pl fi vi ko it hbs_lat da th ja pt da da da sv de da fi en de sv da sv en da da da da da da eo da en da de eo en sv en en fr en en en en en en en es da it da en en es da en en da da en sv en en da da nl da da da it it da da da da nl pl en nl de en en en en en en en en en en en da da da da da da da en en en en en en la en en en da da da da da da en fr da
Press Hardening Steels :: Total Materia Article
Institutter og den akademiske verden
Deep Drawable Steels: Part One
Thermo-Mechanical Treatment (TMT) of Non-Ferrous Alloys: Part One
DataPLUS er et supplerende data modul som leverer korrosions data, materiale samlings information, materiale dimensioner og tolerancer og belægnings informationer for tusinder af metalliske og ikke-metalliske materialer.
Klik her for at se mere.
Overview of Total Materia database 12th January 2022
Overview of Total Materia database 13th January 2022
Total Materia har ved at give os en bestemt metode tilladt os at løse alle problemerne vi havde med søgning af alternative materialer i udlandet. Takket være Total Materia har vi udstedt virkelige "internationale" specifikationer for køb af stål i fremmede lande.
Total Materia er fortsat det eneste værktøj, der vil blive brugt til dette formål.
Bonfiglioli Industrial Gearmotors, Bologna, Italia
Vores mission er simpel;
at gøre Total Materia
til det eneste destination og
første valg for ingeniører
Prof. Dr. Viktor Pocajt, CEO
Key to Metals AG
Press hardening steel answers several challenges within te automotive industry by successfully meeting te requirements of increased safety whilst at te same time contributing to lighter, more eco-friendly materials.
Strength levels can be up as high as 1500MPa meaning application in passive safety systems such as side impact beams works very effectively.
Today’s car bodies have to meet various different and partly contrary requirements in te automotive industry. Higher demands on passive safety tend to result in weight increase while ecological aspects like reduction of fuel consumption and carbon dioxide emission call for light weight constructions. Te application of high strength steels was te first answer to ensure te required safety directives in a light weight car body construction. Although high strength steels have superior mechanical properties, stamping operations become more difficult. High strength goes parallel with reduced formability, increased spring back behavior and excessive tool wear in cold forming applications.
Press hardening steel has become a much used material in car body manufacturing due to its excellent safety and lightweight potential. In some recent car models press hardening steel has reached already a weight share by more than 20% in te body structure while it is estimated that it could reach even around 40% in te future. However conventional press hardening steel based on te alloying concept 22MnB5 was designed originally not for automotive application. In spite of te high strength level, press hardening steel has generally low toughness due to te relatively high carbon content and its martensitic microstructure.
Particularly important is te ductile-to-brittle transition temperature at low temperature, which might lead to unexpected failure in cold climate regions. Furthermore, hydrogen embrittlement is a major concern in press hardening steel as previous results indicated that only a few ppm of hydrogen could induce delayed cracking. Generally it is important that impact energy should be absorbed by te material to avoid unexpected disintegration of te structure. This material capability is usually characterized by te toughness. All these characteristics have not yet been systematically investigated in press hardening steel. Consequently, no attempts have been made to optimize conventional press hardening steel for obtaining better toughness, lower ductile-to-brittle transition temperature and reduced sensitivity to hydrogen induced cracking.
As mentioned above, press hardening is an effective technique to fulfil te contradicting requirements of very high strength levels (1500 MPa) in combination with a high complexity of geometry. Hardenable boron steel (between 0.002% and 0.005% boron) is austenitised at a temperature above 850°C and then quenched between cold tools with cooling rates greater than 25 K s-1 to attain martensitic transformation.
Te utilization of hardenable steel in combination with press hardening applications began in te 1990s and is mainly used for producing passive safety components such as side impact beams, bumper beams and different types of reinforcement components. Besides passive safety and weight reduction, corrosion protection is another major aspect for materials in te automotive industry. Systems of particular interest are those which are able to act as a sacrificial anode for te base material like te zinc coating of galvanized steel. Te use of continuously galvanized steel sheet as feedstock material for indirect press hardening leads to components of very high strength with classical cathodic corrosion protection.
Figure 1: Press hardening-sample geometries
Skriv en sætning for at søge efter:
Finding heat treatment diagrams in te Total Materia database
Heat treatment diagrams are available for a huge number of materials in te Total Materia database.
Heat treatment diagrams covering hardenability, hardness tempering, TTT and CCT can all be found in te standard dataset.
To select materials by special properties, you can use te special search check boxes in te Advanced Search module.
To define te search criteria, all you have to do is select te country/standard of interest to you from te ‘Country/Standard’ pop-up list and to check ‘Heat Treatment Diagram’ boks, situated in te Special Search area of te form in te lower part of te Advanced Search page.
After selecting te material of interest to you, click on te Heat Treatment link to view data for te selected material. Te number of heat treatment records is displayed in brackets next to te link.
All available heat treatment information will then be displayed for te chosen material.
For you’re a chance to take a test drive of te Total Materia database, we invite you to join a community of over 150,000 registered users through te Total Materia Free Demo.
© 2022 Key to Metals AG. Alle Rettigheder Forbeholdes