Tensile properties of the modified 13Cr martensitic stainless steels

Abstract

Abstract. This paper reports the influence of Mo and Ni on the tensile properties of the modified 13Cr martensitic stainless steels in tempered condition. Four steels with different content of Mo and Ni were prepared by induction melting followed by hot forging, quenching and tempering. The experimental results showed that the addition of about 1% and 3% Mo has a beneficial effect to increase both the tensile strength and the elongation of the steels. On the contrary, the addition of about 3% Ni into the martensitic stainless steel results in decreasing of both the tensile strength and the elongation. Among the alloys investigated the 13Cr3Mo type steel exhibited largest tensile strength of 1348 MPa and largest elongation of 12%. The observation on the tensile fractured surfaces by using scanning electron microscope supported these findings.

Effect of Tempering Temperature on Hardness and Impact Resistance of the 410- 1Mo Martensitic Stainless Steels for Steam Turbine Blades

“…These results show that the increasing of Ni and Mo content in the 410 steels decreases the impact energy of the steels. However, the 410-1Mo steel quenched and tempered at 625 o C directly after forging without annealing has been reported having higher tensile strength and elongation than the 410 steel [9]. Therefore, the process sequence should be optimized to achieve better properties of the 410-1Mo martensitic stainless steel.…”

“…Quenching this type of steels from high temperature where austenite phase formed and carbide dissolution occured results in microstructure consists of mainly hard and brittle martensite, small amount of retained austenite, and may some carbides exist [7,8]. Tempering process should be accomplished following quenching for reducing hardness to increase ductility and toughness.The 410-1Mo martensitic stainless steels is a modification of 410 type steels recently developed by incorportion about 1%Mo which exhibit higher tensile strength and higher elongation at breaks compared to the standard 410 type steels [9]. The heat treatment response on the properties of this steels are being investigated and a part of the results has been published elsewhere [10].…”

KETAHANANIMPAK,KEKERASAN DAN STRUKTUR MIKRO PADA BAJA TAHAN KARAT MARTENSITIK13 Cr3MO3Ni DENGAN VARIASI SUHU PERLAKUAN PANAS

“…Dalam penggunaannya umur material relatif singkat. Hal tersebut disebabkan karena beberapa hal, sejumlah penelitian menjelaskan kegagalan ini disebabkan adanya retakan mikroskopis dan tingkat korosifitas yang cukup tinggi [1,2]. Dalam hal ini sudu yang paling sering ditemukan adanya kegagalan ditemukan pada sudu tekanan rendah dari turbin uap [3].…”

Strukturmikro, Kekerasan, dan Ketahanan Korosi Baja Tahan Karat Martensitik 13Cr3Mo3Ni Hasil Quench-Temper dengan Variasi Temperatur dan Waktu Austenisasi [Microstructure, Hardness, and Corrosion Resistant of Martensitic Stainless Steel 13Cr3Mo3Ni after Quench-Temper with Various Austenization Temperature and Time]

“…Mo akan sangat efektif meningkatkan ketahanan korosi, hanya jika ada kehadiran Cr di dalam baja tersebut [7][8] . Pada penelitian sebelumnya telah dijelaskan tentang penambahan unsur Mo dan Ni ke dalam baja tahan karat martensitik dapat memperbaiki sifat mekanik dan meningkatkan ketahanan korosi [9][10][11][12] . Namun, sifat mekanik dan ketahanan korosi baja tahan karat tersebut masih dapat diperbaiki dengan perlakuan panas.…”