LUCEFIN 50CrMo4 (1.7228)

Lucefin 50CrMo4 is a medium-carbon, chromium-molybdenum direct hardening alloy steel that is also suitable for flame hardening, induction hardening, and nitriding. This steel is a medium hardenability steel in the 0.45 to 0.50 mean carbon content classification. In general, it is used for medium and large size parts requiring high hardness as well as high strength and good toughness. A minimum of 90% martensite in the as-quenched condition is desirable. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-877. Producer or source: Lucefin S.p.A.

VOESTALPINE AUSTRALIA 4140

Voestalpine Australia 4140 is medium-carbon, chromium-molybdenum direct hardening alloy steel that is also suitable for flame hardening, induction hardening, and nitriding. This steel is a medium hardenability steel in the 0.40 to 0.42 mean carbon content classification. In general, it is used for medium and large size parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating, machining, and joining. Filing Code: SA-873. Producer or source: voestalpine High Performance Metals.

Rancang Bangun Teknologi Automatic Surface Treatmen Untuk Meningkatkan Ketahanan Jalan Rel Kereta Api

Batang rel berfungsi sebagai penahan berat beban dari rangkaian kereta api yang berjalan diatasnya. Berat yang besar pada rangkaian dapat mengakibatkan gesekan dan keausan yang berlebihan sehingga dibutuhkan permukaan rel yang keras dan tahan terhadap keausan. Tujuan pada penelitian ini adalah rancang bangun prototype alat yang berfungsi sebagai upaya meningkatkan ketahanan pada permukaan jalan rel kereta api. Metode yang digunakan pada konsep penelitian ini dengan teori flame hardening yaitu dengan pemanasan rel kereta api menggunakan gas oxy-asetilen kemudian dilakukan quenching secara cepat untuk meningkatkan kekerasan pada permukaan rel kereta api. Pembuatan prototype dimulai dengan perancangan hardware yang meliputi alat Surface Treatment dan perancangan perangkat software program control automatic. Hasil prototype dilakukan uji fungsi keberhasilan alat yang dapat dioperasikan dengan baik menggunakan mode manual dengan kecepatan maksimal 0.1 m/s dan mode otomatis 0.08 m/s.

Experimental Study of Abrasive, Mechanical and Corrosion Effects in Ring-on-Ring Sliding Contact

This article presents the application of the ring-on-ring test to investigate some of the important factors affecting the abrasive and corrosion wear of a face seal used in the sugar industry. The test involves the sliding contact between two steel rings working in different conditions such as mechanic, abrasive, corrosive extortions and its combination. Rings were made of the C45 steel and the surface layers were modified by heat and thermochemical treatment such as normalizing, flame hardening, nitriding and chrome diffusion. Maximum wear of the sample after tests under mechanic, abrasive and corrosion extortion were obtained. For C45 steel without surface modification the biggest wear was obtained for mechanical, abrasive and corrosive extortion and equals 0.0138 g. This value was three times bigger than the result for the mechanical extortion and ten times than for the corrosive conditions. For individual research options the percentage increase or decrease in wear resistance in relation to the normalized surface layer was determined. In the corrosive extortion the highest increase (90%) of wear resistance was recorded for the chrome layer relative to normalizing sample. The main conclusion of the paper is that the wear effect caused by all factors—mechanical, abrasive and corrosive—is not a straight sum of values of wear.

Perbandingan Induction Hardening dengan Flame Hardening pada Sifat Fisik Baja ST 60

<p><em>This study will discuss the comparison between induction hardening with flame hardening in ST 60 steel in terms of tensile strength and microstructure. The induction hardening machine is designed and made by itself with the maximum heat generated reaching 650 °C. While the flame hardening machine uses an acetylene welding machine. After heating the specimen to 650 °C, it is then cooled using water. Each heating process uses three specimens for tensile testing and microstructure testing. From the tensile test results obtained that, ST 60 steel with induction hardening has a greater tensile strength compared to flame hardening. ST 60 steels which experienced induction hardening treatment also had higher strain compared to ST 60 steels which experienced flame hardening treatments.</em></p>

LUCEFIN GROUP 42CrMo4 (1.7225), 42CrMoS4 (1.7227)

Lucefin Group 42CrMo4 and 42CrMoS4 are medium-carbon, 1% chromium-molybdenum, direct hardening, alloy steels that are also suitable for flame hardening, induction hardening, and nitriding. These steels are medium hardenability steels in the 0.40 to 0.42 mean carbon content classification. In general, they are used for medium and large size parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, machining, and joining. Filing Code: SA-861. Producer or source: Lucefin S.p.A.

Pengaruh kecepatan gerak torch pemanas pada proses automatic flame hardening terhadap nilai kekerasan dan kekuatan tarik baja karbon medium

<p>Steel material was widely used and obtained in the industry and automotive application. The hardness of the surface area and the ductile of the core were produced by using heat treatment, in this case, automatic flame hardening method was used. The heat treatment process was done in order to increase the surface temperature by using a carburizing flame and then the cooling process by using water cooling medium continously followed. The aim of this research was to identify the effect the heating torch velocity on the surface hardness and the tensile strength of the medium carbon steel using the automatic flame hardening process. Some variations were used in this research were heating torch velocities at 10 mm/min, 20 mm/min, 30 mm/min, and 40 mm/min. The results shows that the heating torch velocity at speed 10 mm/min was the most optimal parameter. The maximum hardness of the surface area is reached 398.9 VHN, while the highest tensile strength was 647.3 MPa and the perlit-ferrit phase was also formed. By these results, the hard properties on the surface area and the ductile properties in the middle area of the specimen could be obtained.</p>