This paper evaluates the effect of stress-relieving heat treatment on AlSi10Mg alloy prepared by additive manufacturing using Laser Powder Bed Fusion (L-PBF) with print parameters: 370 W, 1400 m/s, and 50 μm. The as-built state four different annealing modes (240 °C/2 h, 240 °C/6 300 h/water-quenched) are investigated. To determine mode mechanical properties L-PBF alloy, heat-treated samples were compared each other. determined tensile hardness tests. strength in is 488 MPa, depending method...

The Cr–V ledeburitic steel Vanadis 6 was vacuum austenitised, nitrogen gas quenched and double tempered under various combinations of heat treatment regimes. For selected samples, a subzero period inserted between quenching tempering. results obtained infer that: (1) the as microstructure consisted martensite, retained austenite undissolved carbides; (2) processing reduced amount increased tetragonality martensitic lattice; (3) hardness higher by 2–3 HRC due to processing; (4) with...

In the case of titanium alloys, oxide layers on their surfaces strongly influence biocompatibility and corrosion resistance. To improve these characteristics, properties prepared by various methods different base materials were examined. this work, samples widely used biomaterials, CP grade 2 alloy Ti6Al4V, compared with recently developed β‐titanium Ti‐39 wt% Nb. On from materials, thermal (600°C/8 hr/atmospheric air) anodic (1‐M H SO 4 /100 V/1 hr) prepared. The change surface color was...

Tool steels produced with powder metallurgy (P/M) are perspective materials, although they more expensive in comparison tool the conventional method.The work focuses on study of mechanical properties and structure depending heat-treatment conditions for two steels.These 1.2379 steel cold classical high-speed P/M Vanadis 23.Both materials were heat treated manner to achieve a hardness 61 HRC.They also exposed cryogenic treatment at temperatures -90 °C -196 4 h between hardening tempering.We...

Oxide layers on titanium alloy surfaces have an influence bio-compatibility and corrosion resistance. In order to improve them, properties of oxide are examined. The layer can be prepared by different methods under various conditions. This results in a creation showing composition, structure, properties, stability, adhesion biocompatibility. the presented paper, samples three alloys were used: Commercially Pure (CP) grade 2, Ti6Al4V -titanium Ti-39 wt.% Nb. Samples anodically (1MH2SO4 /...

The high-speed P/M steel Vanadis 30 was austenitized at 1100 °C, quenched and tempered various combinations of processing parameters. For one set specimens, also sub-zero period, made -196 °C/4 hours between quenching tempering. microstructure mechanical properties have been investigated as a function austenitizing time, parameters There were used metallographic analysis, hardness measurement three point bending test for the evaluation effect heat treatment conditions to observed materials.

Sub-zero treatment of tool steels is included within the cycle conventional heat treatment. This kind has been reported to improve wear resistance tools. The improvement attributed precipitation fine carbide particles, but depending on a number other factors as well. paper follows previous works, in which effect sub-zero mechanical and structural properties P/M was evaluated. Two types cold work were used research: Vanadis 6 high speed steel 30. They austenitized, nitrogen gas quenched...

Abstract The paper evaluates the properties of two cold work tool steels which differ in production process and content carbon vanadium. Both are characterized by their great hardenability, toughness, dimensional stability wear resistance. They a subledeburitic steel X63CrMoV5-1 produced classical metallurgy ledeburitic Vanadis 6 powder metallurgy. Different austenitizing temperatures range recommended values for material were used during heat treatment. materials tempered at temperature 530...

The paper deals with the assessment of effect content cobalt and cryogenic treatment on mechanical properties structure Vanadis 23 30 PM high-speed steels. studied characteristics are evaluated after conventional heat (quenching multiple tempering) also when deep at -196°C/4 hours was inserted between quenching tempering. assessed by a three-point bending flexural test measurement hardness. Metallographic analysis is performed using an energy dispersive spectrometer (EDS) scanning electron...

<p>This paper discusses issues of growth a thin oxide layer formed on the surface titanium alloys. The introduces corrosion resistance and bio-compatibility, both which are required for medical applications. is result spontaneous passivation, but practical applications it necessary to control oxides. In present work, was CP Ti grade 2, Ti39Nb alloy 2 with PVD coating two different thicknesses by thermal oxidation at 600 °C 8 hours. After process observed SEM.</p>

The growing pressure on tool performance and durability increases demands the materials used choice of optimal heat treatment. properties steels produced by conventional powder metallurgy (1.2379, Vanadis 23) were compared after different treatment modes. Cryogenic was performed in several batches for 4 hours at-90°C or-196°C. inserted between quenching tempering. Mechanical evaluated hardness tests three-point bending strength wear resistance Pin-on-disk tests. Metallographic analysis using...