Bański, Robert

Ostroushko, Dmytro

Szulc, Zygmund

Čížek, Lubomír

English

DSpace at VSB Technical University of Ostrava

Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava číslo 3, rok 2009, ročník Lil, řada hutnická, článek č. 1527 Lubomír ČÍŽEK 1, Dmytro OSTROUSHK01 , Zygmund SZULC2, Robert BANSKl 3 STRUCTURE AND PROPERTIES OF SANDWJCH MATERlALS AFTER EXPLOSJVE CLADDlNG STRUKTURA A VLASTNOSTI SENDVIČOVÝCH MA TERlÁLŮ SPOJENÝCH VÝBUCHEM VŠB- Technica/ University of Ostrava, Ostrava,Czech Republic, contact author, /11bomir.cizek@vsb.cz 1 Z. T. W. EXPLOMET s.c., Opole, Poland, Opole, PolandOpole University of Technology, Opole, Poland Abstract Protective of metal surface has significant role in application of materials in corrosion medium. Usual used stainless steels in the case of heavy products are very expensive. From this reason often is sufficient create thin layer from this material on the surface of usual material. One of methods applied for creating such sandwich materials is explosive welding application. Application of explosive welding enables bonding of different, mutually unweldable metals. Paper discusses the possibility of joining selected materials by explosive cladding. Paper presents results of investigations with two layers explosively fonned sandwich composite consisting of different composition joint (steel - steel, Cu(Zn), Ti). Generally, the welding collectors are metal composites having e.g. steel layer from one side and titanium layer from the other. lt has been proved that elaborated parameters of explosive system ensure complete welding all regions near the join. The microstructure changes of this area have been investigated using light microscopy. Microhardness through the join represents the mechanical properties of this one. Key words: Sandwich metals, explosive cladding, structure, properties 1. lntroductionSurface protection belongs to important processes ensuring efficient and economical use ofmaterials in products and structures. Method of explosive welding of one material to another is one of many applicable methods, became recently very popular and it is frequently used, as it brings about many advantages. Use of this method considerably reduces costs of material and makes it possible to join materials, which cannot be otherwise joined together ( e.g. Ti - steel and others). This is a manner of cold joining of metallic materials by pressur�. Pressure of welding is detennined by the controlled explosi on, which uses energy of blasting means - explosive welding, or explosives shaped according to the fonn of the welded material, surface welding - cladding. li is possible to weld by explosion almost any metals. Thickness of the clad layer can vary from several tenths of millimetre up to 18 mm. At explosive welding two materials are joined by the pressure generated at detonation of an explosive placed on the top surface of the welded material. Position of materials at welding can arranged in be parallel or crossways. The course of explosive welding is schematically shown in Fig. I. At passage of detonation wave, the joined material is immediately defonned by velocity detonation and it falls at the velocity vk on the basic stable material. The place of impact of the joined materials C moves in direction of detonation by the velocity ve and it represents at the same time the velocity of welding. At present a joining arranged in parallel is used in most cases at welding, i.e. p = O. The main kinematic parameters of welding are velocity of detonation Yct. velocity of shifting of the joined material Yv, and velocity of welding (collision) vk. 21 

Struktura a vlastnosti sendvičových materiálů spojených výbuchem

http://dspace.vsb.cz/bitstream/10084/77795/2/VSB%20HUF%202009-3_5_Cizek.pdf

Struktura a vlastnosti sendvičových materiálů spojených výbuchem

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