Nowadays, a wide range of materials is used for car body structures in order to improve both the passengers’ safety and fuel consumption. These are joined by laser welding solid state fiber lasers being more present. The article focused on research influence mechanical deformation properties, microstructure microhardness advanced high-strength steels: low-alloyed steel HC340LA, dual phase HCT600X multi-phase residual austenite RAK40/70. proper parameters have been found based weld quality...

This article presents the implementation of Six Sigma methodology in electro-discharge texturing process cold mill work rolls. The final surface quality sheet metal must meet specific demands car body part producers, which require a texture described by microgeometry parameters: average roughness and peak density. requirements for are mainly related to improving formability adhesion paint painting process. These parameters can be controlled rolls: this is transferred onto surface. allows...

As part of the Industry 4.0 concept, companies are adopting new processes that utilize contactless methods to assess shapes pressings. Evaluating pressings is essential due springback phenomena occur after plastic deformation, which more pronounced when high-strength steels used in car bodies. Although photogrammetric based on 2D images have been industry for over a decade, 3D optical scanning preferred because they offer increased precision. This article evaluated cylindrical made...

The automotive industry requires defining restrictive criteria for prediction of technology characteristics as well safety at car's collision with another object when auto-body components are produced from sheet metal blanks. article presents the methodology specification material properties effects to overloading human organism. Overloading depends on geometry components, strain-hardening intensity and limit value component's shortening that affect component deformation path. Proposed...

The friction coefficient in the simulation of stamping processes should be defined. Modern software allows its definition as constant or dependence on pressure temperature. It is also useful to define different values regions, it often reflects nature deformation process. This article deals with regression and analytical models commonly used determine coefficients specified areas Analytical were verified by an experimental strip drawing test under same contact conditions. Steel sheets for...

Based on physical knowledge and reached experimental results in the contribution are presented analyzed material models for crash test simulations at frontal lateral impact. Experiments were done using following steel quality: hot deep galvanized extra drawing quality sheet, microalloyed TRIP austenitic duplex stainless steels. Mechanical properties of sheets depend hardening mechanism. Workhardening has greater effect than strain rate to change mechanical properties. strainhardening showed...

The decrease of emissions from vehicle operation is connected mainly to the reduction car’s body weight. high strength and good formability dual phase steel grades predetermine these be used in structural parts safety zones. plastic properties are determined by ferrite matrix while improved volume distribution martensite. aim this paper describe relationship between mechanical parameters structure substructure. heat treatment low carbon X60, alloyed S460MC, DP600 allowed for them reach...

This article presents the improved properties of GI (hot-dip galvanized) steel plates in combination with a special permanent surface treatment. The substrate used was hot-dip galvanized deep-drawn sheets grade DX56D + Z. Subsequently, various treatments were applied to their surface. coefficient friction metal without treatment, temporary treatment called passivation, and thin organic coating (TOC) based on hydroxyl resins dissolved water, Ti Cr3+ determined by cup test. quality corrosion...

Similitude theory helps engineers and scientists to accurately predict the behaviors of real systems through application scaling laws experimental results a scale model related system by similarity conditions. The was applied when studying deep drawing process bathtub made from cold rolled low carbon aluminum-killed steel point view material limits. created on basis geometric, physical, mechanical 1:5. Thus, simulations physical models were created. simulation used verify combination yield...

Exterior car-body parts are made of steel or aluminum sheets. Their formability and appearance after painting depends not only on the mechanical properties but also their surface texture. The roughness characteristics, average Ra peak count Pc per centimeter depend texture rolling mill's finishing rollers, wear degree removal by mill. research was carried out heat-treated rollers which a controlled created changing electro-discharge texturing (EDT) parameters. Parameters number experiments...

This In order to define the friction coefficient simulator of strip drawn test between flat dies and cup were applied. To evaluate modified Coulumb law was used for defining at drawing edge die Ouehler formula Due these both evaluation processes it enabled point out difference values in various contact areas rolling product tool. his paper there are presented measurement by applying test. For experimental research following types materials suitable: DC 05- extra deep drawable steel sheet, DX...

Abstract Materials other than standard and advanced high strength steels are remarkable for the thin-walled structures of car-body in recent years order to safety enhancement, weight emission reduction, corrosion resistance improvement. Thus, there presented paper deformation properties laser welded austenitic AISI 304 ferritic 430 stainless compared these one measured low alloyed steel H220PD. The were researched by tensile test 3-point bending with fixed ends on specimens made basic...

This paper presents the formability results of galvanized Zn-Fe-based interstitial-free (IF) “galvanneal” steel sheets with different degrees alloying. The Fe content Zn-Fe coatings was determined by titration method and phase composition raster electron microscopy EDX analyzer. A deterioration adhesion Fe-Zn coating to substrate observed in pre-alloyed coating. applied modes annealing smooth rolling after surface galvanization resulted a change microgeometry parameters Ra Pc. suitability...

The effect of laser welding on the mechanical properties and prediction formability for austenitic stainless steel AISI 304 ferritic 430 when welded by a YLS-5000 fiber laser, were studied in paper. microstructure joint was analyzed using light microscopy. determined static tensile testing. forming limit diagrams produced from notched samples at R5, R17, R25 mm. hardness values base material Vickers method. Samples made showed that suffered due to welding. Longitudinal coarse ferrite grains...

Contribution presents results of study tribological characteristics Fe-Zn coated steel sheets. Experimental research was done using coatings with different alloying – under alloyed, optimal and slightly pre alloyed. The optimally alloyed the prealloyed ones were annealed in order to reach level. Alloying level evaluated by phase composition % Fe coating. Tribological properties such as surface microgeometry, abrasion, friction coefficient analysed from view formability. strip drawn test used...

When numerically simulate the stamping processes, it is important to define friction coefficients in different regions. These depend on deformation processes due various stress-strain states each area. In deep drawing process, conditions blankholder-blank-die area and blank-die radius differ. The analytical models for determination by strip test are presented paper. equations have been used calculate based a physical model of its numerical simulation. experiments performed Zn coated IF steel...

Recent advances in the commercial exploitation of electrospark coatings have focused on improving surface roughness by depositing Ti, Mo, V, or W over an interlayer Cu, Sn, Pb, Cd top a tool steel material. This paper presents results systematic pin-on-disk experimental study different type bilayer (Cu–Sn/bronze, bottom layer; Ti and layer) deposited Type 45 steel. The are discussed terms friction coefficients obtained under dry-friction conditions (speeds ranging from 0.3m∕sto0.8m∕s,...

The body constitutes the largest proportion of total vehicle weight. Recently, increasing efforts have been made towards reducing its weight and improving crashworthiness. By weight, fuel consumption will be reduced, this also translate into lower CO2 emissions. In terms safety, components use high strength steel which can absorb a substantial amount impact energy. present study pays attention to DP 600 TRIP 400/700 stress-strain characteristics at quasi-static strain rates. absorption...

The present investigation was set up to examine both predicted and experimental values of forces, power, press work friction in drawing cups from low carbon steel blanks using the same die but different uncoated TiN coated conditions. results showed a good agreement between values. In addition, findings demonstrated that tools reduced at tool – blank interface (by about 5%), which turn power 7%) improved final product quality, when compared performance tools..

The producers of components require that cuts steel sheets for superficial parts cars would have guaranteed surface microgeometry, minimum defects, homogenous over the full width and length belt, mat appearance, good adhesion Zn layer. Microgeometry galvanized is one decisive factors affecting appearance after painting stampability sheets. Requirements microgeometry are mainly focused on roughness parameters R a [μm] (roughness), P c [cm -1 ] (number peaks) or W (undulation roughness). This...

In the automotive industry considerable attention is paid to innovations oriented especially meeting safety and environmental requirements. Concepts of vehicle focus on resistance deformation zone components impact intrusion undesirable fragments into passengers´ space. terms these aspects samples base materials from micro-alloyed steels HSLA - H220PD, DP 600 TRIP RAK 40/70 also welded by solid-state fibre laser YLS-5000 were analysed. Multi-phase structure showed considerably higher values...

This paper outlines the considerations of strength and energy absorbing car body by applying mechanical properties steel sheets with higher properties. Good combination ductile dual-phase helps reduce weight improve crash safety body. High-strength steels have better deep-drawing capacity stretching compared to microalloyed at same strength. Dual phase sheet comparable streching but poorer deep drawing than DC04. Measured values LDR FLD0 serve engineers who haven't experience application high for

This paper researches the surface condition and wear on hole-flanging punch when producing a flanged Ø7 mm hole in steel strip S355J2 + N (1.0577) with thickness of 3 mm. The was by defined geometry known as tangent ogive described via caliber radius head (CRH) ratio. During process, made hardened tool 1.3343 appeared after 20,000 strokes. Thus, multipurpose coating TiCN-MP deposited Lateral Rotating Arc-Cathode technology applied to extend lifetime. coated polished remove droplets...

When the sheet metal stamping processes are simulated, different values of friction coefficient need to be defined in regions, considering nature deformation process. Thus, regression and analytical models determine under blankholder on die drawing edge by strip test presented article. These were verified experimental same contact conditions. Zn coated high strength low alloyed steel H220PD+Z100 was used at experiments tests done against tool TiCN MP steel. The results indicate, that...

Modern approaches in simulations of sheet metal stamping processes are based on definition the friction coefficient as not constant, but different value regions, considering nature actual deformation process each individual region. In this contribution regression and analytical models to determine coefficients under blankholder die drawing edge by strip test presented. These were verified experimental same contact conditions. Zn coated steel sheets for automotive industry used experiments –...