Emisije delcev prahu pri procesih rezanja in varjenja

magistrsko delo

Lovro Cigić (Author), Borut Kosec (Mentor)

Abstract

Postopki plamenskega rezanja, plazemskega rezanja in ročnega obločnega varjenja predstavljajo obdelovalne tehnologije, ki so povezane z emisijami prašnih delcev. Ti delci imajo negativen vpliv na zdravje operaterja, saj zaradi svoje majhnosti lahko prodrejo globoko v pljuča. Vpliv se določi z merjenjem emisij delcev, morfologije delcev, kemične sestave delcev in velikosti delcev. Postopki za merjenje teh parametrov so obravnavani v standardu ISO 13322-1:2014, ki v prvem delu podaja priporočila za analizo zajetih delcev. V sklopu magistrskega dela je podrobneje opisana analiza emitiranih prašnih delcev nastalih pri plamenskem rezanju in plazemskem rezanju jekla S460 in ročnem obločnem varjenju jekla S460 in AISI 316. Za zajemanje delcev se je uporabil osebni vzorčevalnik Zambelli, tehtanje delcev je potekalo na elektronski tehtnici, velikost in morfologija delcev ter kemijska sestava pa so bile določene z vrstičnim elektronskim mikroskopom na poljsko emisijo. S primerjavo dobljenih rezultatov je bilo ugotovljeno, kako na merjenje parametre vpliva izbira jekla, izbira obdelovalnega postopka in uporaba naprave za odsesavanje. Izkazalo se je, da oba postopka rezanja proizvedeta več emisij delcev kot ročno obločno varjenje. Pri vseh postopkih nastanejo pravilni sferični delci in aglomerati. V emitiranih prašnih delcih pri vseh postopkih prevladujeta železo in kisik, ki sta v obliki različnih oksidov.

Keywords

emisije prašnih delcev;plamensko rezanje;plazemsko rezanje;ročno obločno varjenje;standard ISO 13322-1:2014;analiza prašnih delcev;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.09 - Master's Thesis
Organization:	UL NTF - Faculty of Natural Sciences and Engineering
Publisher:	[L. Cigić]
UDC:	669
COBISS:	48280067
Views:	408
Downloads:	129
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	dust particles emissions at cutting and welding processes
Secondary abstract:	The processes of oxyfuel cutting, plasma cutting and shielded metal arc welding represent material processing technologies that are strongly associated with particulate matter emissions. These particles have a negative impact on the health of the operator, as they penetrate deep into the lungs due to their small size. The effects are determined by measuring particulate matter emissions, particle morphology, chemical composition of the particles and particle size. Methods for measuring these parameters are discussed in ISO 13322-1: 2014. The first part of which provides recommendations for the analysis of the collected particles. In the master thesis the emitted particulate matter, which are produced by flame cutting and plasma cutting of S460 steel and manual arc welding of S460 and AISI 316 steel, were analysed. The collection of the particles was carried out by the personal sampler Zambelli, the weighing of the particles was done on an electronic balance, particle size, morphology and chemical composition were determined with a field emission scanning electron microscope. By comparing the results obtained, it was determined how the measurements of these parameters are influenced by the choice of steel, the choice of processing technology and the use of a suction device. It was found that both cutting processes produce more particulate matter emissions than manual arc welding. In all processes spherical particles and agglomerates were formed, consisting mainly of iron and oxygen, which are present in the form of various oxides.
Secondary keywords:	dust particles emissions;oxy-fuel cutting;plasma cutting;shielded metal arc welding;standard ISO 13322-1:2014;dust particles analysis;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za materiale in metalurgijo
Pages:	XXI, 63 f.
ID:	12345782