This contribution is focused on the influence of build orientation hardness materials sintered using direct metal laser sintering (DMLS) technology. It builds current research works that has monitored a fatigue life, mechanical properties, roughness after machining, etc. In mentioned work, slight above properties was shown. The measured Ti6Al4V alloy which made powder by DMLS individual were at different powers, then annealed to remove internal stresses. Part experiment examined...

AbstractThis paper deals with the study of effects mechanical surface preparation on adhesion coating high content zinc dust. Five kinds mechanically blasted surfaces were studied. The following used as abrasives: steel shot, grit, brown corundum oxide and zirblast. last type was modified by MBX Blaster technology (mechanical bristle blasting). topography quantified a roughness profilometer. shape size incurred inequalities studied using 3D microscope images surface. purity after...

Ti6Al4V samples have been prepared by Direct Metal Laser Sintering (DMLS) with varied laser power. Some of the were stress-relief annealed. The microstructure materials was investigated using a light microscopy. Columnar grains martensite dominate in as-made microstructure. Stress-relief annealing led to white acicular phase growth structure fishbone arrangement on boundary some original martensitic needles. Mechanical properties characterized through hardness measurement two directions...

This work focuses on joining steel to aluminum alloy using a novel method of by resistance spot welding with an insert element based anticorrosive in combination adhesive bonding. The aims reduce the formation brittle intermetallic compounds short times and different chemical composition element. In experiment, deep-drawing low-carbon steel, HSLA zinc-coated precipitation-hardened 6082 T6 were used. Two types adhesives-one rubber other epoxy resin-were used for bonding, while surfaces...

Abstract The paper presents results of research the essential characteristics two kinds advanced coatings applied by HVOF technology. One studied coating: WB-WC-Co (60-30-10%) contains types hard particles (WC and WB), second coating is eco-friendly alternative to previously used WC-based coatings, called “green carbides” with composition WC-FeCrAl (85-15%). In green carbides heavy metals (Co, Ni, NiCr) forming binding matrix in conventional wear-resistant are replaced more environmentally...

The contribution presents the research results of hardfacing metals’ resistance in conditions abrasive wear. Two types electrodes with a different chemical composition were used creation three layers metals. determines difference hardface deposit structure. We have investigated influence mixing base metal and filler welds structure on against experiments showed that intensity wear is very dependent parameters as well morphology

Abstract The paper focuses on assessment the resistance of hot-sprayed coatings applied by HVOF technology (WC–Co–Cr created using powder two different grain sizes) against erosive wear dry-pot test in a pin mill at sample angles. As these are designated for environment with varying elevated temperatures and often contact abrasive, have been subjected to thermal cyclic loading their has determined as-sprayed condition after 5 th 10th cycles. corrosion was evaluated linear polarization (Tafel...

The paper is focused on investigating the quality of two grades thermally sprayed coatings deposited by high-velocity oxygen fuel (HVOF) technology. One grade contains WC hard particles in an environmentally progressive Ni- and Co-free FeCrAl matrix, while second coating WB a cobalt matrix. aim experimental work was to determine effect thermal cyclic loading coatings’ resistance adhesive, abrasive erosive wear. Abrasive wear evaluated using cloth grit sizes, dry-pot test pin mill at sample...

Abrasive blasting modifies the surface state of pre-treated materials in terms irregularities. Bearing mind that roughness characteristics affect components functionality, it is essential to study and evaluation materials. The paper deals with relation between individual parameters blasted surfaces by correlation analysis. Based on measured values which were various types devices, matrix was set standard statistic importance monitored determined from it. coefficient also set. There found...

The paper deals with the effects of CAM data needed to produce desired quality shaped surfaces in forming dies making. In general, input have strong influence final surface quality. 3D milling has been modeled as end ball defined inclination. is most common way finish surfaces. Directions tools motion and applied cutting conditions used simulate when setting strategies. resultant machined identified terms roughness. introduces recommendations applicable programming different types strategy...

In this article, we analyse five types of coatings, in terms their microstructure, hardness, porosity, and wear resistance, the as-sprayed state. The coatings are WC-based (WC-FeCrAl, WC-WB-Co, WC-NiMoCrFeCo), alloy-based (Co-MoCrSi), or nanoWC coating-based (nanoWC-CoCr). Two tests were applied to assess resistance coatings: a dry-pot test with two impact angles an abrasive using cloth grit sizes. Porosity was determined by image analysis. Vickers impression performed on cross-sections...

The paper deals with evaluation of relation between individual parameters roughness the blasted surfaces by correlation analysis. Based on measured values which were various types blasting devices, matrix was set and standard statistic importance monitored determined from it. coefficient also set.

This paper deals with joining dissimilar materials using thermal drilling technology as well the combination of and adhesive bonding. The base for experimental work were deep-drawn low-carbon steel DC04, HSLA TL 1550-220 + Z, structural aluminum alloy EN AW-6082 T6 (AlSi1MgMn). geometry formed joints was tested metallographically load-bearing shear capacity under tensile test single-lapped resistance against corrosion-induced disbonding in a climate chamber. energy dissipated by up to...

Article deals with analysis of production and characteristics ceramic coatings applied using HVOF technology. It presents the results research focused on quality evaluation basis WC-Co impact Boron Nitride protective layer. were exposed to hard tribocorrosive conditions. For determining corrosive resistance 1M solution NaCl, potentiodynamic tests accelerated salt spray test used. Experiment confirmed that coating clearly improves even in combined Protective layer seals pores structure thus...

The paper focuses on the possibility of HPDC molds restoration for aluminium casting by laser and MAG weld cladding with a welding wire same grade like base material. A chemical analysis deposits showed decrease in content some elements deposit due to higher thermal input bath. lower heat has resulted incidence fusion defects lack between Thermal conditions during affected hardness their abrasive resistance as well. materials against dissolution when immersed AlSi8Cu3 alloy was similar both metal.

Abstract In this article, the attention is paid to HVOF (High Velocity Oxygen Fuel) thermal spraying method by which progressive coatings are applied on basic material C15E (STN 412020). These based C-17CO, WC-CO-Cr and Cr3C2-25NiCr. There was made determination of chemical composition assessment quality - adhesion, microhardness, porosity wear resistance at room temperature (21°C) also operational elevated (900°C). Results adhesive showed high all evaluated their suitability extreme...

This article is focused on the effect of position a build platform hardness, roughness and corrosion rate parts (Ti6Al4V) produced by direct metal laser sintering (DMLS) technology. During process, test samples were located at key positions—at corners in middle platform. An experimental program started with microstructure investigation two perpendicular directions individual positions. The selected mechanical property—hardness—was investigated metallographic cuts both all positions, data...

This paper presents results of the research focused on possibility restoration shape parts molds made X15CrNiSi20-12 (EN 100 95) heat-resistant austenitic chromium-nickel stainless steel working in high-pressure die casting aluminum alloys by clad welding. There were tested two welding wires—E Ni 6625 and E 18 8 Mn B 2 2—deposited tool using cold metal transfer (CMT) a protective atmosphere Ar. The resistance welds was against dissolution molten alloy ENAC-AlSi9 testing procedure designed....

In this paper, author introduce common needs of increasing surface quality in tool making, a sort products manufactured by free form milling technology. Principles the free-form decomposition into measurable samples are presented and that is method combining CAD modeling with design sampling objects. Sampling objects classed both according to their measurability applied strategy. Authors verify experimentally approach for three strategies finishing operations while surfaces investigated...

The applicability of flowdrill technology to join steel and aluminum alloys is studied. When used two overlapped thin-walled materials, a joint formed as secondary effect. quality the resulting bushings forming interference fit was investigated by metallography. joints were using combination uncoated deep drawn steel, galvanized high-strength low alloy alloy, in different positions joint. Subsequently, tensile shear testing single performed. load-carrying capacity also tested with adhesive...

This paper deals with research into the influence of surface preparation before adhesive bonding galvanised and non-galvanised steel substrates. The substrates were experimentally treated chromate-free zirconate passivation, iron phosphate, zinc phosphate an experimental organosilane-based preparation. roughness was evaluated by a set selected vertical horizontal parameters. corrosion rate tested electrochemical impedance spectroscopy linear polarisation. Single-lap joints created using...

Abstract The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the fragment cut during repair “Soyuz” gas main after 30 years operation. It is shown that slightly changes its properties when operated under influence working stresses environmental factors. Structural degradation micro-defects accumulated wall were scattered, indicating material retains sufficient plasticity allows it to resist processes nucleation macrocracks.

The conventional and innovative surface technologies are applied to sheet metal stamping dies in order produce a composite material with properties unattainable either the base or material. To select proper materials for forming systematic evaluation of materials, their heat treatment coatings required. This paper deals plasma sprayed Cr 2 O 3 , Al WC12Co by pressure plate-ring test (tester T 05) deep drawing process. Friction coefficients seizure these were studied under dry wet friction...