PARAMETRIC ANALYSIS OF THE EFFECTS OF CARBURIZING PROCESS ON THE MECHANICAL PROPERTIES OF CARBURIZED MILD STEEL (original) (raw)
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Pack Carburization of Mild Steel, using Pulverized Bone as Carburizer: Optimizing Process Parameters
… Journal of Practices …, 2010
Investigation was conducted into the mechanical properties of mild steel subjected to packed carburization treatment using pulverized bone as the carburizer, carburized at 850°C, 900°C and 950°C, soaked at the carburizing temperature for 15 minutes and 30 minutes, quenched in oil and tempered at 550°C. Prior carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the data obtained, ultimate tensile strength, engineering strain, impact strength, Youngs' moduli were calculated. The case and core hardness of the carburized tempered samples were measured. It was observed that the mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature and soaking time at carburizing temperature. It was concluded that the sample carburized at 900°C soaked for 15 minutes and the one carburized at 850°C soaked for 30 minutes followed by oil quenching and tempering at 550°C were better because they showed a trend of hard case with softer core. 11 5. The mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature soaking time at carburizing temperature.
THE EFFECT OF CARBURIZATION ON HARDNESS AND WEAR PROPERTIES OF THE MILD STEEL SAMPLES
The properties of metals and alloys can be changed by heating followed by cooling under definite conditions to make them suitable for specific applications. Carburization is a method of producing mild steel having tough inner core and hard outer surface. Three Heat Treatment process namely Quenching, Carburizing and Tempering were done. The mild steels are carburized at temperature range of 850 to 950 o C and then it is tempered at 200 o C for thirty minutes after that it subjected for different kind of tests such as abrasive wear, hardness, tensile and toughness. The results indicated that the process of carburization greatly improves the mechanical and wear properties like hardness, tensile strength and wear resistance and these properties increases with increase in the carburization temperature but apart from this, the toughness property decreases and it is further decreases with increase in carburization temperature. The mild steels carburized at the temperature of 950 o C gives the best results for the mechanical and wear properties because at this temperature it gives the highest tensile strength, hardness and wear resistance, so it must be preferred for the required applications.
Effect of Carburization on the Mechanical Properties of the Mild Steel
International Journal of Innovation and Applied Studies, 2014
The properties of metals and alloys can be changed by heating followed by cooling under definite conditions to make them suitable for specific applications. Carburization is a method of producing mild steel having tough inner core and hard outer surface. Three Heat Treatment process namely Quenching, Carburizing and Tempering were done. The mild steels are carburized at temperature range of 850 to 950 o C and then it is tempered at 200 o C for thirty minutes after that it subjected for different kind of tests such as hardness, tensile and toughness. The results indicated that the process of carburization greatly improves the mechanical properties like hardness and tensile strength and these properties increases with increase in the carburization temperature but apart from this, the toughness property decreases and it is further decreases with increase in carburization temperature. The mild steels carburized at the temperature of 950 o C gives the best results for the mechanical properties because at this temperature it gives the highest tensile strength and hardness, so it must be preferred for the required applications.
Materials Research, 2009
Due to the complexity of controlling parameters in carburization, there has been relatively little work on process variables during the surface hardening process. This work focuses on the effects of the carburizing temperature and time on the mechanical properties of mild steel carburized with activated carbon, at 850, 900 and 950 °C, soaked at the carburizing temperature for 15 and 30 minutes, quenched in oil, tempered at 550 °C and held for 60 minutes. Prior carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the data obtained, ultimate tensile strength, engineering strain, impact strength, Youngs' moduli were calculated. The case and core hardness of the carburized tempered samples were measured. It was observed that the mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature and soaking time at carburizing temperature. It was concluded that the optimum combination of mechanical properties is achieved at the carburizing temperature of 900 °C followed by oil quenching and tempering at 550 °C.
A Review on Effect of Carburizing on Hardness of Low Carbon Steel
2021
Steel is the most versatile material in engineering. The processes of heat treatment affects the mechanical and structural properties of steel either by allotropic modification or by changing relative solubility of elements in the base metal. A suitable method of heat treatment is adopted depending upon the properties and the applications required for any design purpose. It is evident that the mechanical and structural properties of steel can be altered by heat treatment processes and the type of treatment depends on the composition of the steel. Low carbon steel is soft and hardly any martensite is formed on quenching due to less carbon content. Thus to improve the surface hardness of low carbon steel, carburizing is done by different methods. The carburizing treatment develops a hard and wear resistant case on steel surface with a tough core. Many researchers worked on different approaches of carburization to analyze the effect on mechanical properties of steel. This review paper ...
IOP Conference Series: Materials Science and Engineering, 2017
Low carbon steel has a lot of applications in daily life because of its excellent properties. Among its excellent properties are good ductility, toughness, formability, and weldability. For the case of application that requires good wear resistant, carbon steel is not sufficient. For this case it is required to increase the hardness of carbon steel, such as by carburizing method. In this method one factor that affects the carburizing layer is metal substrate condition, i.e grain size. Another factor is temperature that could have significant role on the carburized layer characteristics. Therefore the present works focus in the correlation between degree of reduction of cold rolling and carburizing temperature on the carburized layer characteristic. Thermo-mechanical treatment was applied to the specimen with reduction of 0%, 30%, and 80% by mean of rolling before carburizing process. Carburizing processes were carried out at temperature of 850 o C, 900 o C, and 950 o C. Examinations on carburized specimens were conducted by metallography and micro hardness test. The result showed that the specimen of 80% reduction giving the thickest layer and the hardest surface layer. In addition, at temperature of 900 o C, the hardest layer was formed with the hardness at 1003 HV. However, the thickest layer was formed at the temperature of 950 o C.
The effects of varied carburizing temperatures and holding time on the mechanical properties of AISI/SAE1020 steel have been investigated. Standard test samples prepared from the steel sample were subjected to pack hardening process using carbonized palm kernel shell as a carburizer at 800°, 850°, 900° and 950°C and held for 60, 90 and 120 minutes, quenched in oil and temper at 500°C for 60 minutes. After pack hardening process, the test samples were subjected to tensile, impact and hardness tests. and from the data obtained Ultimate tensile strength (UTS) and impact strength were calculated, the case and the core hardness of the carburized samples were taken and optical microscope was also used to observe the micro structural features of the case hardened, quenched and tempered samples. It was observed that at 800°, 850° and 900°C, the UTS and the micro hardness initially reduces to minimum and then increased as the carburizing temperature increased, but at 950°C, it was observed that the UTS increases with increase in holding time. It was concluded that the optimum combination of mechanical properties is achieved at the carburizing temperature of 950°C soaked for 120 minutes followed by oil quenching and tempered at 500°C for 60 minutes. 41 http://lejpt.academicdirect.org Effect of carburizing temperature and time on mechanical properties of aisi/sae 1020 steel using …
2018
Pack Carburizing process is the process of adding carbon element (C) into the metal, especially on the surface of the material where the carbon element is obtained from materials containing carbon so that the metal hardness can increase. Carburizing research that has been done with teak wood charcoal media and BaCO3 or NaCO3. The Pack Carburizing process is high costly. This study uses an alternative carburizing media in the form of bamboo charcoal and cow bone powder. The aim of this research is to know the difference of toughness value and hardness of low carbon steel which have undergone pack carburizing process, and reheating process of low carbon steel. The pack carburizing process was carried out at temperature 9000 C for 7 hours carburizing time. The hardening process was carried out by reheating the specimens at 900° C, for 50 minutes holding time, cooled with air-cooled media, water and water + 30% salt. Then tested toughness and hardness test. While Scanning Electron Micro...
International Journal of Innovation and Scientific Research, 2015
The various mechanical and wear properties of alloys and metals are investigated by acknowledging the heat treatment and various carburization processes. In this investigation, the mechanical and wear properties of mild steel carburized were studied at different ranges of temperature i.e. 800, 870 and 940 degree Celsius. The aim of the present study was to analyze the effect of carburization temperatures at different scales and conditions on mechanical and wear properties of carburized mild steel. The above different temperatures were tempered at 500 degree Celsius for half an hour and then subjected for different tests such as hardness test, tensile stress test, abrasive wear test and toughness test. The results after experimental work showed that mechanical and wear properties are improved and these properties increase with increase in the carburization temperature. It was analyzed from experimental calculations through proper investigations that the toughness property decreased with the increase in the carburization temperature. So, 940 degree Celsius is best suited for mechanical and wear properties of mild steel because it gives highest tensile strength, hardness and wear resistance. It can be concluded from the experimental results of the present study that hardness, tensile strength and wear resistance of the mild steels can be improved by a simple heat treatment of solid carburizing process.
Pack Carburization of Mild Steel, using Pulverized Bone as
Leonardo Electronic Journal of Practices and Technologies, 2010
Investigation was conducted into the mechanical properties of mild steel subjected to packed carburization treatment using pulverized bone as the carburizer, carburized at 850 C, 900 C and 950 C, soaked at the carburizing temperature for 15 minutes and 30 minutes, quenched in oil and tempered at 550 C. Prior carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the ...