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Abstract

The paper presents the capabilities of welding techniques to creating properties of wear resistant high chromium cast iron alloy. The use

of the right kind of welding sequence allows you to change the structure and properties of the obtained welds. Tests were conducted for

one type of additive material in the form of self shielded core wire. In order to determine the effect of the type of welding sequence on the

properties of welds performed welding using string bead and weave bead. The resulting weld was tested on hardness and research structure

in an optical microscope. In the following studies have been made erosive tests wear of made hardfacing. String beads gave structure rich

in carbides and harder about 270 HV of the weld with weave bead. Also, wear resistance was nearly twice as better for welds made with

string beads. In the experiment a decisive role in the resistance to wear plays a high hardness of the deposit and the presence of carbides in

its structure. Changes in the basic parameters of the deposition process allows for the formation of structure and properties of hardfacing

welds in a wide range.

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Authors and Affiliations

T. Wyleciał
M. Gucwa
J. Winczek
R. Bęczkowski
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Abstract

Steel loss related to the formation of scale is a parameter that is of great importance in the charge heating process. The value of steel loss determined by the thickness of the scale layer affects the intensity of the heat transfer process in the heating furnace, but also constitutes a significant element in the heat-material balance. Reducing the loss of steel during charge heating has a positive effect on heat consumption and material losses, which is extremely important in the context of energy and resource savings, the main elements of sustainable development processes. The methodology of determining the loss of steel to scale in an industrial heating furnace is presented in the paper. The results of calculations for various charge temperatures at the entrance to the furnace are presented. The influence of furnace operating conditions on steel loss is discussed.
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Authors and Affiliations

J. Boryca
1
ORCID: ORCID
T. Wyleciał
1
ORCID: ORCID
D. Urbaniak
1
ORCID: ORCID

  1. Czestochowa University of Technology, 19 Armii Krajowej Av., 42-200 Czestochowa, Poland
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Abstract

Both the steel loss to scale and the scale adhesion are very important parameters of the heating process. High values of steel loss (large thickness of the scale layer) reduce the heat exchange intensity in the furnace chamber, which results in higher energy consumption. A low adhesion value adversely affects the operation of heating furnaces, while too high value causes the scale to roll into a steel product and deteriorate its purity and quality.
The paper presents the research methodology and the results of measurements of steel loss and scale adhesion. The effect of the excess air combustion ratio values on loss of steel and scale adhesion for constant furnace efficiency is discussed. This influence was described by mathematical dependencies. The tests were carried out for traditional technology and rational technology, enabling the reduction of steel losses to scale and energy consumption.
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Authors and Affiliations

T. Wyleciał
1
ORCID: ORCID
J. Boryca
1
ORCID: ORCID
D. Urbaniak
2
ORCID: ORCID

  1. Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, Department of Production Management,19 Armii Krajowej Av., 42-201 Czestochowa, Poland
  2. Czestochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, Department of Thermal Machinery, 19 Armii Krajowej Av., 42-201 Czestochowa, Poland

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