Analysis of Multiple Indicators of Ion Nitrided Layers of BH11 Steel

Abstract

In modern scientific and engineering expertise there are a few methods for graphical computational analysis related to decision making. However, few of them are devoted to materials science and the determination of the complex of properties separately and simultaneously. This research proposes a decision analysis approach tested for the basic properties of BH11 steel. With the help of the approach the tendencies as technological regimes in the change of the microhardness Hv, the relative wear resistance Kv and the connected nitride zone δnz are established. A model for the phase composition is derived, which interprets all observed trends and technological regimes for the relatively minimal and relatively maximal studied values. Thus, the efficiency of the technology in processing the considered steel is associated with the structure and properties of ion nitrided layers, which as a research is the main task of materials science.

Investigation of the penetration of the counter-body in the nitride zone of steels and analysis of concomitant characteristics

“…The obtained regression models (3) and ( 6) for both steels have a high power correlation coefficient (R = 0.85 -0.91). They are adequate according to Fisher's criterion: F Calc = 5.16 > F Table = 4.1 for model (1); F Calc = 4.8 > F Table = 3.43 for model (6), at a significance level of 0.05. Due to the models (3) and ( 6) in Table 3, the modes of minimal and maximal penetration of the counterbody are determined using the methodology described in [13].…”

“…When applying the materials technological processes related to coatings, layers, or their explored parameters, it is necessary to create an opportunity to control and manage the results of the studied indicators [1]. This circumstance is directly related to the demand for specific applications of the respective technological regimes, characterised by one or another efficiency.…”