Jominy End Quench Test of Martensitic Stainless Steel X30Cr13

Landgraf, Pierre; Birnbaum, Peter; Meza-García, Enrique; Grund, Thomas; Kräusel, Verena; Lampke, Thomas

doi:10.3390/met11071071

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…The other tools are dimensioned based on the general functional scheme of the tool given in figure 7. In the work, the dimensioning of each plate of the tool will be given only in general form [6,17]. The construction of the dies, their quality, and die life are highly significant aspects of total manufacturing operations, including the quality of the parts produced [16,17,21].…”

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confidence: 99%

Material Research for the Production of Outdoor and Kitchen Knife Blades at Low Costs

Bruçi,

Bajrami,

Bruçi

et al. 2023

Strojnícky Časopis - Journal of Mechanical Engineering

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In today’s modern times, consumers have changed the idea of shopping. They want a functional product with performance at a low price. On the other hand, the consumer demands a variety of products in the market in terms of dimensions and usability. As the requirements are different, the engineers are challenged with different tasks related to the design of production systems, process design, organization and marketing. In this research, we will present some of the special materials used for knife blades manufactured worldwide. The proper selection of materials and their thickness significantly affects the production price, processing method, corrosion resistance, mass. Special emphasis in the work is devoted to the design of the knife blade for household requirements, model ARIA22, made of EN 1.4028 stainless steel material. It describes the work of the die block, blanking punch, the necessary energy parameters for the realization of the processing process with piercing and punching, as well as the profitability of the production.

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confidence: 99%

Material Research for the Production of Outdoor and Kitchen Knife Blades at Low Costs

Bruçi,

Bajrami,

Bruçi

et al. 2023

Strojnícky Časopis - Journal of Mechanical Engineering

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“…Jominy hardenability simulation has proven to be a valuable tool in the design of these Q&P alloys. Landgraf et al[149] looked at the influence of thermal treatments on the properties of martensitic steel X30Cr13 using JMatPro simulations to model the phase formation at different temperatures and Jominy hardenability simulations against experimental data. Landgraf et al found the use of JMatPro key in reducing the number of experiments and suitable to find optimum processing windows.…”

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confidence: 99%

Ultra High Strength Steels for Roll Formed Automotive Body in White

Hardwicke

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One of the more recent steel developments is the quenching and partitioning process, first proposed by Speer et al. in 2003 on developing 3rd generation advanced highstrength steel (AHSS). The quenching and partitioning (Q&P) process set a new way of producing martensitic steels with enhanced austenite levels, realised through controlled thermal treatments. The main objective of the so-called 3rd generation steels was to realise comparable properties to the 2nd generation but without high alloying additions. Generally, Q&P steels have remained within lab-scale environments, with only a small number of Q&P steels produced industrially. Q&P steels are produced either by a one-step or two-step process, and the re-heating mechanism for the two-step adds additional complexities when heat treating the material industrially. The Q&P steels developed and tested throughout this thesis have been designed to achieve the desired microstructural evolution whilst fitting in with Tata's continuous annealing processing line (CAPL) capabilities. The CALPHAD approach using a combination of thermodynamics, kinetics, and phase transformation theory with software packages ThermoCalc and JMatPro has been successfully deployed to find novel Q&P steels. The research undertaken throughout this thesis has led to two novel Q&P steels, which can be produced on CAPL without making any infrastructure changes to the line. The two novel Q&P steels show an apparent reduction in hardness mismatch, illustrated visually and numerically after nanoindentation experiments. The properties realised after Q&P heat treatments on the C-Mn-Si alloy with 0.2 Wt.% C and the C-Mn-Si alloy with the small Cr addition is superior to the commercially available QP980/1180 steels by BaoSteel. Both novel alloys had comparable levels of elongation and hole expansion ratio to QP1180 but are substantially stronger with a > 320MPa increase in tensile stress. The heat treatment is also less complex as there is no requirement to heat the steel back up after quenching due to one-step quenching and partitioning being employed on the novel alloys.

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