Analysis of the Influence of Drawing Speed on the Amount of Retained Austenite in TRIP Steel Wires

Wiewiórowska, S.; Muskalski, Z.

doi:10.4028/www.scientific.net/ssp.199.379

Cited by 10 publications

(8 citation statements)

References 2 publications

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“…The wires were heat treated under laboratory conditions in resistance heating furnaces manufactured by LAC, according to the parameters established in the previous tests, which allowed a maximum amount of retained austenite to be obtained in the structure [8].…”

Section: Methodsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Wiewiórowska¹,

Muskalski²,

Michalczyk³

2019

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Many wire products (e.g. nets) are made from galvanized material. The hot dip galvanizing process gives the possibility of applying in a respectively thick coat of zinc (also depending on the time of staying wires in the bath) which provides the protection of the product against corrosion. In the available literature there were no research concerned with the influence of hot dip galvanizing process on the mechanical properties TRIP structure steel wires.Therefore, an experiment was carried out in laboratory conditions allowing the determination of the influence of hot dip galvanizing process parameters on the mechanical properties (tensile strength UST and yield strength YS) of TRIP steel wires as well as on the amount of retained austenite in their structure. It has been stated that the hot galvanizing process of TRIP steel wires influences, proportionally to the time of staying wires in zinc bath, on their plastic properties (the increase in yield strength YS) as well as the decrease in the amount of retained austenite in their structure. Such a phenomenon can be caused by stresses responsible for rapid heating of the wire put in the zinc bath in temperature of 450°C and by the strengthening of the materials resulting from the transformation of retained austenite.

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Section: Methodsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Wiewiórowska¹,

Muskalski²,

Michalczyk³

2019

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“…The film-like retained austenite with a nanometer size in Q&FP steel is incorporated within martensite lath (Figure 7c). Despite most metastable austenite transforming progressively into martensite during tension [93,94], the remaining austenite with a high C content is relatively stable (Figure 7d). The strain-induced martensitic transformation can significantly enhance the work hardening and ductility of the Q&FP steel, as compared to the MART-Si and MART steels with the same or lower stress levels (Figure 7e).…”

Section: Effect Of Flash-partitioning Process On Mechanical Performan...mentioning

confidence: 99%

Multi-Scale Microstructural Tailoring and Associated Properties of Press-Hardened Steels: A Review

et al. 2023

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High-strength press-hardened steels (PHS) are highly desired in the automotive industry to meet the requirement of carbon neutrality. This review aims to provide a systematic study of the relationship between multi-scale microstructural tailoring and the mechanical behavior and other service performance of PHS. It begins with a brief introduction to the background of PHS, followed by an in-depth description of the strategies used to enhance their properties. These strategies are categorized into traditional Mn-B steels and novel PHS. For traditional Mn-B steels, extensive research has verified that the addition of microalloying elements can refine the microstructure of PHS, resulting in improved mechanical properties, hydrogen embrittlement resistance, and other service performance. In the case of novel PHS, recent progress has principally demonstrated that the novel composition of steels coupling with innovative thermomechanical processing can obtain multi-phase structure and superior mechanical properties compared with traditional Mn-B steels, and their effect on oxidation resistance is highlighted. Finally, the review offers an outlook on the future development of PHS from the perspective of academic research and industrial applications.

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“…Since 2005, a team of scientists from the Częstochowa University of Technology has been the first in the world to undertake research on using TRIP steel for wires and wire products. Basic research carried out under two research projects made it possible to solve the assumed research problems and resulted in many publications [24][25][26][27][28][29]. As part of another research project entitled "Development of an innovative technology and launching the production of steel wire rod with a carbon content of 0.1-0.4% C with a TRIP effect and implementation of the technology of drawing new generation of steel TRIP wires for products manufactured in the drawing industry and metal products", the technology of obtaining wire rods with TRIP structures was developed.…”

Section: Introductionmentioning

confidence: 99%

Determination of Two-Stage Heat Treatment Parameters in Industrial Conditions in Order to Obtain a TRIP Structure in Low-Alloy Carbon Steel Wires

et al. 2022

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The research presented in this article aimed to obtain a semi-finished product in the form of TRIP wires, which in further research will be used to produce fasteners in the form of KPS-6 screws used in the construction industry. At present, the process of manufacturing this type of fastener (from wire rod to the finished product) involves two technological lines: one for carrying out the drawing process and obtaining a semi-finished product in the form of a wire with appropriate properties, and the other for the production of fasteners. Semi-finished product wires with a ferritic-perlitic structure obtained after the drawing process are the starting product for the production of fasteners, the tensile strength of which is approximately 450 MPa. In order to be able to obtain fasteners characterized by an increased level of properties in 8.8 grade, after the screw manufacturing process, heat treatment should be carried out by hardening and tempering. The new technology proposed in the article includes: a drawing wire rod with a semi-finished product diameter, two-stage heat treatment on the line for pass-through heating and cooling, ensuring the obtaining of a TRIP-type structure in drawn wires, and calibration drawing. The product of this process was a wire whose tensile strength was in the range of 700–800 MPa with a TRIP structure. Thanks to obtaining a TRIP-type structure with the assumed amount of retained austenite, we obtained wires with higher strength properties and very high plasticity in relation to wires with the same chemical composition and ferritic and perlitic structure. The research carried out in the article also allowed us to obtain, in the semi-finished product wires, a favourable relationship between the strength properties and plasticity of the material, expressed by the value of the Re/Rm coefficient (yield strength/tensile strength) and the so-called yield ratio, which determines the material's susceptibility to cold deformation; the smaller these coefficients, the greater the yield strength. The subsequent stages of the research will include the development of forming fasteners in the form of KPS-6 screws used in the steel construction industry with TRIP structures, with increased properties of products in the 8.8 property class, without conducting heat treatment by hardening and tempering. It is assumed that the resulting product will have an additional usable feature: preserving a certain amount of retained austenite in the structure of the finished fasteners, which will be transformed into martensite during operation, and thus affect the longevity of the fasteners.

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Analysis of the Influence of Drawing Speed on the Amount of Retained Austenite in TRIP Steel Wires

Cited by 10 publications

References 2 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Multi-Scale Microstructural Tailoring and Associated Properties of Press-Hardened Steels: A Review

Determination of Two-Stage Heat Treatment Parameters in Industrial Conditions in Order to Obtain a TRIP Structure in Low-Alloy Carbon Steel Wires

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