Introduction To Steel Segregation

Severe inhomogeneity of steel composition is called segregation. This phenomenon includes not only the uneven distribution of common elements such as carbon, manganese, silicon, sulfur and phosphoru...

The Function Of Vanadium In Steel

Effect of vanadium on microstructure and heat treatment of steel(1)Vanadium and iron can form a continuous solid solution, strongly reduce the austenite phase area.(2)Vanadium and carbon, nitrogen, o...

Pipeline Flange Connection Overview

1) The matching flange specifications and models are the same; When connecting with the flange of the equipment, it shall be matched according to its specifications.2) When the flange is connected, i...

Introduction Of Electric Arc Furnace Steelmaking

Electric arc furnace (EAF) steelmaking use electrical energy as heat source for steelmaking process, it is produced by the discharge between the electrodes and the burden of arc, the electric energy ...

The Role Of Silicon In Steel Pipes

Silicon element is added as reducing agents and deoxidizers in the steelmaking process, so killed steel will contain 0.15-0.30% of silicon, when the amount of silicon in steel exceeds 0.50-0.60%, the...

Brief Introduction Of Metal Salt Mist Test

Most of the corrosion of metallic materials occurs in the atmospheric environment, which contains corrosive components such as oxygen, humidity, temperature changes and contaminants, as well as corro...

Heating Defects And Control In Heat Treatment Of Steel Pipes

1. OverheatingWe know that overheating in the heat treatment process is most likely to lead to the thickening of austenite grains, so that the mechanical properties of parts decline.The heating temp...

Principles Of Solid-Soluble Reinforcement Of Metal Materials

Jul 15, 2019View: 1041.Definition of solid-soluble reinforcementThe alloy element is dissolved in the substrate metal to cause a certain degree of lattice distortion, thus increasing the alloy strengt...

The Hazards Of Sulfur In Steel Pipe

Sulfur comes from the ore and fuel coke of steelmaking, which is a harmful element in steel. Sulfur is found in steel in the form of ferrous sulfide (FeS), FeS and Fe form a low melting point (985 de...

Why Is It Important To Say The First Product Test?

The first product inspection in the production process is mainly to prevent products quality problem from appearing in batches。 It is a means of pre-control the production process of products, It is ...

Can Heat Treatment Be Repeated After Failure Of Heat Treatment?

In general, two heat treatments are allowed.Heat treatment rework has a limit of times, which is explained in all kinds of standards, the specific determination should be based on the test. In factor...

Introduction To Food Grade Stainless Steel

Food grade stainless steel refers to stainless steel that comes into contact with food or beverages. Food grade stainless steel must meet certain food safety requirements. Because the food production...

Concept And Classification Of Nonmetallic Inclusions In Steel

During the smelting process of steel, the deoxidization reaction will produce oxides and other products. If these products do not emerge before the solidification of the molten steel, they will remai...

Principles For The Selection Of Pipe Materials For Pressure Linepipe

The selection of pressure pipe materials is determined according to the characteristics and operating conditions of the conveyed medium (e.g. pressure, temperature). In the selection of tube material...

Deformation And Selection Method For Cold Bending Of Steel Pipe

Bending pipe is widely used in boiler and pressure vessel industry, central air-conditioning manufacturing, automotive industry, aerospace industry, shipbuilding manufacturing and other industries, b...

Introduction To Austenitic Stainless Steel

Austenitic stainless steel refers to stainless steel with austenitic tissue at room temperature. The steel contains Cr about 18%, including ni8%-10%, C about 0. At 1%, it has a stable austenitic tiss...

Corrosion Analysis Of Stainless Steel Pipeline In Offshore Environment

There are many differences between the Marine atmospheric environment and the inland atmospheric environment. When analyzing the corrosion of the stainless steel pipeline, it is necessary to consider...

The Introduction Of Precision Tube

Precision tube is a kind of ordinary seamless steel tube (or ERW welded steel tube) through the process of fine drawing or cold rolling. Due to the precision bright tube inside and outside wall no ox...

SA335 P91 Alloy Steel Pipe Welding Process Requirements

The SA335 P91 alloy steel is a new steel type that adds an improved elements of v, Nb, N, Ti and Al to the 9Cr-1Mo steel. The alloy steel pipe has good anti-high temperature oxidation and creep resi...

A Brief Description Of Microalloy Steel

Aug 12, 2019View: 104The role of microalloy elements in steel is to refine grains in order to improve the strength and toughness of steel, while relying on the analysis of microalloy elements to furth...