SUS440 is a high-carbon stainless steel, and its martensite matrix has high heat resistance, high corrosion resistance, and high pressure resistance. It has been widely used in mechanical parts and critical materials. However, the SUS440 martempered matrix has reliability problems in thin plate applications and thus research uses different austempering heat treatments (tempering temperature: 20...

Cr-Mo steels are well-known for their high temperature application in thermal power plants. P91, P911 and P92 most commonly used application. The de-rived strength from tempered martensite precipitates of MX M23C6 type. normalizing tempering the performed before putting them service condition. present manuscript describes effect varying heat treatment regimes on microstructure mechanical proper...

Abstract The paper analyses the possibility of post weld heat treatment (PWHT) quality assessment with help magnetoacoustic emission (MAE) signal measurements. Two welded superheater tubes, made high chromium VM12 steel, were analysed—as and treated one. analysed sample in as state exhibited significantly higher hardness, accompanied by a big difference MAE intensity (of order about 50%). In to...

In the present research work, influence of heat treatment on corrosion behavior a supermartensitic stainless steel (SMSS) in sour solution (H 2 S gas was replaced by sodium thiosulfate) studied using polarization curve electrochemical techniques (CP) and Electrochemical Impedance Spectroscopy (EIS), along with microstructural characterization optical microscopy X-ray diffraction (XRD) measureme...

This study was attempted to develop a process model, using the temperature values measured by the coupled infrared temperature measurement system (pyrometer and camera) correlated with the measured values of case depth hardness of the tool steel AISI S7 (hypoeutectoid steel) for the specified multi-pass laser heat treatment conditions (1000–2500 J). A number of heat treatment experiments by cha...

Steel components frequently involve a heat treatment to improve mechanical properties. In order meet difficult working conditions, several are hardened by quenching. W. Nr. 1.7709 is representative structural steel with very low thermal conductivity among EN wrought alloy steels, which extensively used after hardening and tempering. Although the steelmakers provide technical information about t...

The construction of heavy polar icebreakers is usually done with special hull steels, which require comprehensive properties such as good low-temperature toughness, high strength, and superior fatigue resistance. Reasonable satisfactory heat treatments should be investigated applied to acquire the required strength since this deemed an effective approach ameliorate combined high-strength steels...

JIS SUP 9 steel is one of the materials commonly used for suspension components in motorized vehicles with medium carbon base material. It must have good hardness and toughness so that failure does not occur during operational. This research was conducted to increase Steel through a heat treatment various quenching media. The carried out 830-880ºC temperature holding time 7 minutes then cooled ...

Heat treatment is a process of renewing the metal structure by heating specimen to temperature below melting point and certain time, which then cooled in cooling medium change physical mechanical properties. This study aims determine effect quenching media tempering on hardness value DC 11 steel. used an experimental method with hardening at 990 °C holding time 30 minutes SAE 10W-30 oil 3.45 Na...