PL74176B2

PL74176B2 -

Info

Publication number: PL74176B2
Application number: PL15115971A
Authority: PL
Priority date: 1971-10-22
Filing date: 1971-10-22
Publication date: 1974-10-31

Description

Urzadzenie takie powinno byc wyposazone w elementy umozliwiajace najlepiej bezstopniowa regulacje parametrów pracy, a w szczególnosci predkosci obrotowej, predkosci posuwu drutu elektrodowego oraz natezenia i napiecia pradu elektrycznego - co umozliwia i zapewnia wybór najwlasciwszych parametrów dla danych, konkretych warunków, a co za tym idzie — stabilna prace oraz dobre wyniki procesu napawania.Wspomniane wyzej, najkorzystniejsze parametry pracy, nalezy dobrac, najlepiej na drodze praktyczno-dos- wiadczalnej, miedzy innymi stosownie do przekroju drutu elektrodowego, zadanej grubosci (przekroju) napoiny oraz gatunku obydwu tworzyw: elektrody i elementu, na którym dokonuje sie napawania. Niezaleznie od powyzszego, wchodzi w rachube wzajemny dobór obydwu wymienionych wyzej tworzyw, badz w przypadku, gdy stosuje sie warstwe wzglednie warstwy posrednie — wzajemny dobór odpowiednio wiekszej ilosci tworzyw.Takze w tym zakresie najlepsze i najszybsze wyniki mozna osiagnac na drodze doswiadczen i prób praktycznych.Po zakonczeniu procesu napawania, elementy poddaje sie powolnemu studzeniu, przy czym w pewnych przypadkach moze wchodzic w rachube odpowiednia obróbka termiczna, np. wyzarzanie odprezajace. Z kolei, powierzchnie uszczelniajace w postaci napoin, poddaje sie znanym procesom obróbki mechanicznej, w tym wykanczajaco — gladkosciowej, jak np. toczenie, szlifowanie, docieranie, dogladzanie itp.3 74 176 PL PLSuch a device should be equipped with elements enabling the best stepless adjustment of the operating parameters, in particular the rotational speed, the feed speed of the electrode wire and the intensity and voltage of the electric current - which allows and ensures the selection of the most appropriate parameters for given, specific conditions, and thus - stable work and good results of the surfacing process. The above-mentioned, most favorable operating parameters should be selected, preferably in a practical and experimental way, among others according to the cross-section of the electrode wire, the given thickness (cross-section) of the padding weld and the type of both materials: the electrode and the element, on which is performed surfacing. Regardless of the above, it is possible to select the two above-mentioned materials together, or if intermediate layers or layers are used - to select a correspondingly larger amount of materials. Also in this respect, the best and fastest results can be achieved through experience and practical tests. After completion of the surfacing process, the elements are subjected to a slow cooling, and in some cases it may be considered appropriate thermal treatment, e.g. stress annealing. On the other hand, the sealing surfaces in the form of welds are subjected to the known processes of mechanical processing, including finishing and smoothing, such as turning, grinding, lapping, refining, etc.

Claims

1. Claims 1. Method of surfacing the sealing surfaces, closing the flow, especially ring surfaces in pipeline fittings, in particular the method of surfacing with alloys containing copper and / or iron on cast iron elements or alloys containing copper on steel or steel elements, characterized by the fact that the padded element at ambient temperature is electrically welded, with only one electrode at a time, in a protective gas shield.

2. A variant of the method according to claim 1, characterized in that the layer or intermediate layers are first welded on the given element, and the outer layer is the last layer, i.e. the outer layer, which then constitutes the proper sealing surface, where the individual layers are made of different materials, and the material of the layer or intermediate layers has a lower coefficient of thermal expansion than the material of the outer layer.

3. The method according to p. A process as claimed in claim 2, characterized in that the layer or one of the intermediate layers is carbon steel or an alloy steel or other iron-containing alloy, and the outer layer is a copper-containing alloy.

4. A variant of the method according to claim 2. The process of claim 2, wherein the layer or one of the intermediate layers is an aluminum-containing alloy and the outer layer is a copper-containing alloy. PL PL