SEARCH RESULT

The aim of this study was to investigate the effect of the material hardness and microstructural characterization of the spring steels having the qualities of 51CrV4, 54SiCr6, 55Cr3 and 60SiCr7 produced according to the heat treatment application conditions. Fragments cut to appropriate sizes from spring steels were subjected to hardening process for 1 hour and tempering temperature for 1.50 hour at austenitization temperature determined from Fe-C balance diagram. When the applied heat treatments were evaluated generally, no differences were observed in the structure of the spring steel as a result of the cooling of the oil and the cooling of the austenitization zone in different cooling environments resulted in differences depending on the internal structure of the mechanical properties. As a result of the cooling process, internal stresses occurred and the microstructure turned into a mantle, resulting in rigidity and brittleness. This martensite structure tempering process reduced the internal stresses of the metallic material, the hardness fell a little and softened.

International Iron & Steel Symposium
UDCS

Esma KESKİN Hayrettin Ahlatçı Yunus Türen Mustafa Ali KÜÇÜK Yasin SUBAŞI

The aim of this study was to investigate the effect of the material hardness and microstructural characterization of the spring steels having the qualities of 51CrV4, 54SiCr6, 55Cr3 and 60SiCr7 produced according to the heat treatment application conditions. Fragments cut to appropriate sizes from spring steels were subjected to hardening process for 1 hour and tempering temperature for 1.50 hour at austenitization temperature determined from Fe-C balance diagram. When the applied heat treatments were evaluated generally, no differences were observed in the structure of the spring steel as a result of the cooling of the oil and the cooling of the austenitization zone in different cooling environments resulted in differences depending on the internal structure of the mechanical properties. As a result of the cooling process, internal stresses occurred and the microstructure turned into a mantle, resulting in rigidity and brittleness. This martensite structure tempering process reduced the internal stresses of the metallic material, the hardness fell a little and softened.

International Iron & Steel Symposium
UDCS

Esma KESKİN Hayrettin Ahlatçı Yunus Türen Mustafa Ali KÜÇÜK Yasin SUBAŞI

In this study; The effect of the heat treatment applied to the samples taken from the domestic production gear part used in the construction machinery, on the heavy abrasive wear is investigated. Samples removed from the threaded part were allowed to stand at 900 ºC for 1 hour and then cooled by quenching. Water samples were tempered at 400 ºC for 1.5 hours. Non-heat-treated and heat-treated samples were subjected to abrasive wear test against 60 mesh Al2o3 sandpaper under 40N, 80N, and 120N load. The abrasive wear resistance of the examined domestic nail in severe abrasive wear conditions improved by 37% in heat treatment

International Iron & Steel Symposium
UDCS

Cemal ÖZGENÇ Hayrettin Ahlatçı Yunus Türen Süleyman Yaşın Esma KESKİN Mustafa Ali KÜÇÜK Yasin SUBAŞI Burcu Çetintaş

In this study; Rod drew 54SiCr6 and 60SiCr7 steel’s resistance to severe abrasive wear response were examined by the means of comparing Si and Cr contents. The sample pieces with 10 mm diameter and 20 mm high from the medium carbon steels were subjected to abrasive wear test against Al2O3 sandpaper with a particle diameter of 210 µm under 40, 80, 120 N loads. It has been observed that the abrasion resistance of 54SiCr6 and 60SiCr7 medium carbon steels has improved with the decrease of Si content in the structure of steel and the increase of Cr content at the same time.

International Iron & Steel Symposium
UDCS

Esma KESKİN Hayrettin Ahlatçı Yunus Türen Mustafa Ali KÜÇÜK Cemal ÖZGENÇ Yasin SUBAŞI Burcu Çetintaş

In this study; The effect of the solution and aging heat treatments on the corrosion behavior on high chromium cast steel samples with the compositon of 1.61% C + 25% Cr + 0.74% Si + 0.55% Mn + 0.38% Mo + 0,23% Ni + 0.15% V were investigated. The samples solution heat treatment - rapid cooled for 4 hours at 1150 ℃, aged for different times between 5-25 and in cast (original) status were subjected to corrosion treatment. Corrosion behavior was investigated by immersion method in 10% FeCl3 and 10% H2SO4 medium. As a consequence, the least corrosion rate was seen on the sample kept at the solution condition and then cooled by water rapidly while higher corrosion rates were observed on cast (original) status and aged samples.

International Iron & Steel Symposium
UDCS

Mustafa Ali KÜÇÜK Hayrettin Ahlatçı Yunus Türen Soner Arı Yasin SUBAŞI Süleyman Yaşın

In this study, fatigue behavior of 55Cr3 metal alloy spring steel which is produced as hot and cold was examined. Fatigue samples with a diameter of 10 mm, extracted from 55Cr3 spring steel in accordance with ISO 1143 standard, were subjected to rotational bending fatigue testing of different masses under repeated bending stresses according to a continuous rotating neutral axis. As a result of the investigations, the fatigue strength of 55Cr3 spring steel decreased with hot process, while the cold process increased.

International Iron & Steel Symposium
UDCS

Esma KESKİN Hayrettin Ahlatçı Yunus Türen Hüseyin Zengin Mustafa Ali KÜÇÜK Yasin SUBAŞI