PL78071B2

PL78071B2 -

Info

Publication number: PL78071B2
Application number: PL15640172A
Authority: PL
Priority date: 1972-06-30
Filing date: 1972-06-30
Publication date: 1975-04-30

Description

W przypadku normalizowania srut zostaje skierowany do zasobnika 22 króccem 27, natomiast w przypadku hartowania kanalem 24 do komory 2 o przekroju prostokat¬ nym posiadajacym perforowane dno 19, gdzie podlega sfluidyzowaniu mieszanina spalin z powietrzem i odpusz¬ czeniu w temperaturze w zakresie 250 -s- 650°C.W przypadku hartowania z przemiana izotermiczna komora 23 zostaje wylaczona z procesu na skutek polaczenia kanalu przesypowego 15 z kanalem 24 przez przesuniecie ruchomej rynny 26 w odpowiednie polozenie, co powoduje, ze srut z komory 4 kierowany jest bezposrednio do komory 2 gdzie zachodzi izotermiczna przemiana austenitu w temperaturze 250—550°C.Do regulacji czasu przebywania srutu w komorze 2 w procesie jego odpuszczania i przemiany izotermicznej sluzy przegroda 13.Po zakonczeniu procesu obróbki cieplnej srut kierowany jest z komory 2 poprzez króciec 21 do pojemni¬ ka 22.78 071 3 Urzadzenie bedace przedmiotem wynalazku umozliwia równiez przeprowadzenie w komorze 1 procesu grafityzacji lub odweglania, przy czym w przypadku odweglania atmosfera pieca zamiast obojetnej bedzie odweglajaca.Dla zapewnienia wlasciwego przebiegu procesu, urzadzenie wyposazone jest w aparature kontrolno-pomia¬ rowa umozliwiajaca pomiar i automatyczna regulacje ilosci dostarczonego gazu i powietrza pierwotnego i wtórne¬ go oraz temperatury w komorach. Utrzymanie wymaganego skladu atmosfery komór urzadzenia, zapewnia zainstalowany analizator gazów rejestrujaco-sterujacy. PL PLIn the case of normalization, the shot is directed to the bunker 22 through the stub pipe 27, while in the case of quenching through the channel 24, to the rectangular chamber 2 having a perforated bottom 19, where the mixture of exhaust gas with air is fluidized and tempered at a temperature in the range of 250 -s 650 ° C. In the case of quenching with isothermal conversion, the chamber 23 is excluded from the process due to the connection of the transfer channel 15 with the channel 24 by shifting the movable chute 26 into the appropriate position, which causes that the shot from chamber 4 is directed directly to chamber 2 where isothermal transformation takes place austenite at a temperature of 250-550 ° C. The septum 13 is used to control the time of the shot in chamber 2 in the process of its tempering and isothermal transformation. After the heat treatment is completed, the shot is directed from chamber 2 through a connector 21 to the container 22.78 071 3. being the subject of the invention, it is also possible to carry out a graph process in chamber 1 ithitization or decay, but in the case of decay, the furnace atmosphere will be decaying instead of inert. In order to ensure the proper course of the process, the device is equipped with a control and measurement device enabling measurement and automatic regulation of the amount of gas and primary and secondary air supplied as well as the temperature in chambers. Maintaining the required composition of the atmosphere in the chambers of the device is ensured by the installed recording and control gas analyzer. PL PL

Claims

1. Claims 1. The method of heat treatment of shots, characterized in that the shot fluidized in a high temperature chamber (1), constituting a fluidized bed, is subjected to austenitization or graphitization process, or re-navigating, and fluidized in the chambers (23 and 2) is subjected to further processing heat, such as, for example, quenching, tempering, normalizing and quenching with isothermal transformation, the flue gas generated in the chamber (1) being at the same time an inert or dewaxing atmosphere for the fluidized bed.

2. The method according to claim The method of claim 1, characterized in that the hot flue gases leaving the chamber (1) after being cleaned in the cyclone (8) are mixed in a mixing heat exchanger (9) with the air supplied by a fan (10) and used for the subsequent heat treatment of the shot in the chamber (2) . 3. A device for heat treatment of shots, characterized by the fact that it is equipped with a high temperature chamber (1) and chambers (23) and (2) connected with each other by transfer channels (15 and 24) and a sliding chute ( 16). 4. Device according to claim 3. The chamber (2), characterized in that the chamber (2) has a cross-section in the form of a parallelogram and a movable partition (13) with dimensions so selected that they ensure a certain time of the shot staying at the required temperature. 5. Device according to claim

3. 4, characterized in that it allows any choice of chambers (23 and 2) depending on the assumed heat treatment process. 18c, 9/00 78 071 MKPC21d9 / 00 Prac. Typographer. UPPRL. Order 55/75 Mintage 120 + 18 Price PLN 10 PL PL