Parametrična analiza oblikovnega obločnega navarjanja jekla 15-5 PH

Ščetinec, Aljaž (author), Klobčar, Damjan (mentor), Bračun, Drago (comentor)

V delu je obravnavano oblikovno obločno navarjanje z martenzitno nerjavno žico 15-5 PH. Izziv je v iskanju parametrov, ki zagotavljajo stabilen proces ter v iskanju relacij in interakcij med procesnimi parametri in merjenimi izhodnimi kontrolnimi faktorji. Z načrtovanimi eksperimenti se je raziskovalo: a) vpliv različne dolžine prostega konca žice na merjeno obločno napetost in jakost varilnega toka, b) vpliv finih nastavitev pulzne dinamike pri pulznem varjenju na geometrijo varkov in na količino brizganja in c) vpliv jakosti varilnega toka, obločne napetosti in medvarkovne temperature na geometrijo oblikovno navarjenih izdelkov in na stabilnost delovanja procesa. Ugotovili smo, da je s spremljanjem obločne napetosti in jakosti varilnega toka med procesom varjenja možno sklepati na dolžino prostega konca žice. Ugotovili smo relacijo med finimi nastavitvami pulzne dinamike in količino brizganja med varjenjem. Ugotovili smo relacije med procesnimi parametri in geometrijo oblikovno navarjenih izdelkov. Navarili smo testni izdelek z optimalnimi parametri za najstabilnejše delovanje procesa in željeno geometrijo slojev.

• Language: Slovenian
• Keywords: varjenje, aditivne tehnologije, oblikovno obločno navarjanje z žico, načrtovanje eksperimentov, optimizacija procesa, nerjavno jeklo, 15-5 PH
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [A. Ščetinec]
• Year: 2019
• Number of pages: XXII, 69 str.
• PID: 20.500.12556/RUL-109729
• UDC: 621.791.75:669.14(043.2)
• COBISS.SI-ID: 16928795
• Publication date in RUL: 07.09.2019

Secondary language

• Language: English
• Title: Parametric analysis of wire and arc additive manufacturing with 15-5 PH steel

Abstract

In this thesis wire and arc additive manufacturing with a 15-5 PH martensitic stainless steel wire is researched. The problem is in finding the correct parameters which allow for a stable process and in finding relations and interactions between process parameters and measured control factors. With designed experiments the following was explored: a) influence of the wire stick out length on the welding voltage and current, b) influence of fine tuning pulse dynamics in pulse welding on weld bead geometry and ammount of spatter and c) influence of the welding current, voltage and weld interpass temperature on the geometry of welded layers and on the process stability. It was established that it is possible to correlate wire stick out length to the value of welding voltage and current. We established the relation between pulse dynamics parameters and amount of spatter during welding. We discovered the relation between process parameters and the geometry of the wire and arc additive manufactured layers of products. We manufactured a test product with optimized parameters for the most stable process and desired geometry of the layers.

• Keywords: welding, additive manufacturing, wire and arc additive manufacturing, design of experiments, process optimization, stainless steel, 15-5 PH