Steel World

2023-11-01 Steel World Comments Off on Continuous casting cannot pour boiling steel

When pouring boiling steel in continuous die casting, due to the boiling of molten steel in the crystallizer, honeycomb bubbles are easily exposed and the molten steel overflows, affecting the surface...

2023-11-01 Steel World Comments Off on Process for extracting vanadium from vanadium-titanium magnetite

Vanadium-titanium magnetite is a kind of symbiotic magnetic iron ore mainly containing iron, titanium and vanadium. Most of the vanadium and iron minerals are isomorphous in the magnetite. This type o...

2023-11-01 Steel World Comments Off on Digital looper controlled process

The main purpose of automatic looper control is to maintain tension-free rolling between stands. Currently, digital looper control technology is mostly used in high-speed wire production. Digital phon...

2023-11-01 Steel World Comments Off on Design and calculation method of flange wedge valve body turning tool

In the valve body processing of various types of wedge gate valves, there is usually the problem of processing M85×2-6H threads on the inclined wedge surface with a wedge angle of 2°5′. ​ In order to ...

2023-10-31 Steel World Comments Off on The concept of converter volume ratio (V/T) and its impact on the blowing process

Converter volume ratio (V/T) refers to the ratio of the volume V (m3) of the free space in the converter cavity to sheet metal charging amount (molten iron + scrap steel + pig iron block unit t). If t...

2023-10-31 Steel World Comments Off on What are the classifications of flanges?

The above figure gives the general situation of flange classification. Let’s take a detailed look at various types of flanges. According to the degree of overall properties: ​ (1) Integral flange 1． F...

2023-10-31 Steel World Comments Off on pressure perforation

The process of punching the solid blank into a capillary tube by extrusion method. There are two types of perforated capillary tubes: those with cup bottoms and those with penetrations, which are used...

2023-10-31 Steel World Comments Off on Analysis and treatment of common vibration faults of large long-axis deep well pumps

Through the analysis of vibration faults of large deep well pumps and various possible causes of vibration, a method for simple on-site judgment of motors and pumps is proposed. Panzhihua Iron and Ste...

2023-10-31 Steel World Comments Off on What are the precautions when bonding and docking plastic flanges?

During the construction of plastic pipelines, plastic flanges are often used to connect with cast iron flanges, iron valves and other pipe fittings. There are two main types of flanges in our factory:...

2023-10-31 Steel World Comments Off on Effect of casting structural design on die-casting mold life

1) Under the condition that the structural strength of the casting is met, the die-casting mold should adopt a thin-walled structure. In addition to reducing the mass of the casting, this also reduces...

2023-10-31 Steel World Comments Off on lost foam casting

Lost foam casting (also known as real mold casting) is to bond and combine foam models similar in size and shape to the castings into model clusters. After brushing with refractory paint and drying, t...

2023-10-31 Steel World Comments Off on What is metal material testing

Metal materials are metallurgical products. The production, ordering, transportation, use, storage and inspection of metal materials must be based on unified technical standards – metallurgical ...

2023-10-31 Steel World Comments Off on Flange connection structure and sealing knowledge

The flange connection structure is an assembly consisting of a pair of flanges, several bolts, nuts and a gasket. It is an assembly drawing of the overall structure of the pipe flange connection. In p...

2023-10-31 Steel World Comments Off on The position of the vertex of the swing head mold

The swing head swings around its apex. The apex O of the swing head mold must be located on the OM axis (machine axis) to ensure the dimensional accuracy of the swing grinding part and the correct mol...

2023-10-31 Steel World Comments Off on Analysis of control valves

Correctly select the end connection form of the control valve and the process pipeline (annular surface connection/convex surface connection/wafer type). If equipped with a counter flange, the valve s...

2023-10-31 Steel World Comments Off on Asymmetric rolling

Asymmetrical rolling is a rolling process in which the deformation conditions are asymmetrical to the horizontal center plane of the rolled piece. The deformation conditions of rolling include the ext...

2023-10-31 Steel World Comments Off on Cold heading

Cold heading is a forging forming method that thickens the top of a bar or wire at room temperature. Cold heading is mainly used to manufacture bolts, nuts, nails, rivets, steel balls and other parts....

2023-10-31 Steel World Comments Off on What is GB9123.3-2000 tongue and groove steel pipe flange cover?

1 Scope This standard specifies the types and dimensions of tongue and groove steel pipe flange covers with nominal pressures PN of 1.6, 2.5, 4.0, 6.3, 10.0, 16.0MPa and nominal pressures PN of 5.0, 1...

2023-10-31 Steel World Comments Off on Code for inspection of pressure pipelines in chemical enterprises

Inspection Regulations for Pressure Pipelines of Chemical Enterprises; 1 General Principles 1.1 In order to ensure the safe operation of chemical pipelines and protect the safety of people’s liv...

2023-10-31 Steel World Comments Off on Defects and prevention of liquid die forgings: extrusion cold insulation

When the molten metal stays in the mold cavity for a long time, the mold is closed and pressure is applied, and the molten metal is squeezed to fill the mold, forming a cold gap between this part of t...

2023-10-31 Steel World Comments Off on Causes and elimination methods of wire ears

The strip-shaped protrusions on the surface of the wire along the rolling direction are called ears, and there are single-sided ears and double-sided ears. Due to tension in the production of high-spe...

2023-10-31 Cnc Machining Guide Comments Off on What is GB9123.2-2000 concave and convex steel pipe flange cover

1 Scope This standard specifies the types and dimensions of concave and convex steel pipe flange covers with nominal pressures PN of 1.6, 2.5, 4.0, 6.3, 10.0, 16.0MPa and nominal pressures PN of 5.0, ...

2023-10-31 Steel World Comments Off on How niobium regulates austenite

Before the 1980s, controlled rolling technology was not perfect, the process was very complex and confusing, and the role of microalloying was elusive depending on the controlled rolling system. The c...

2023-10-31 Steel World Comments Off on Location selection of ladle bottom blown argon breathable bricks

Different blowing positions will affect the mixing effect. Hydraulic models and production practices show that the best position of the blowing point should usually be 1/2 to 2/3 of the radius of the ...

2023-10-30 Steel World Comments Off on What are the railway signal designs for metallurgical plants?

Design of railway signaling for metallurgical works The design of railway signals that need to be set up in the railway transportation system of metallurgical plants. Railway signaling is a general te...

2023-10-30 Steel World Comments Off on Application areas of galvanized pipes

Often referred to as galvanized pipes, the purpose of galvanized pipes is that the iron pipes used for gas and heating are also galvanized pipes. Galvanized pipes are used as water pipes. After a few ...

2023-10-30 Steel World Comments Off on Cyanide and characteristics of steel

Cyanidation of steel is also called “carbonitriding”. The initial cyanide is carried out with cyanide salt, so it is generally called ‘cyanation’. It is a chemical heat treatme...

2023-10-30 Steel World Comments Off on Melt outside furnace purification

The metal melt discharged from the furnace is continuously processed to remove gases, inclusions and harmful elements before casting, which is also called melt online processing. The purification effe...

2023-10-30 Steel World Comments Off on Adjustment mode and water pump selection of main water supply system of pressurized water reactor nuclear power plant

Abstract: By analyzing the thermal parameter control requirements of the secondary loop of a pressurized water reactor nuclear power plant and the operating characteristics of electric fixed-speed fee...

2023-10-30 Steel World Comments Off on Galvanized pipe painting process

A continuous galvanized pipe painting production process and equipment. The process includes the following steps: passivation step, cleaning step; painting step; curing step. Before the painting step,...

2023-10-30 Steel World Comments Off on Characteristics and scope of use of oval-square hole type system

The characteristics of the oval-square hole system are as follows: (1) Large elongation coefficient; (2) The position of the corners of the rolled piece can be changed, so that the metal spinning surr...

2023-10-30 Steel World Comments Off on Factors affecting the accuracy of sizing during continuous shearing and sizing

When continuously shearing to length, the following main factors affect the accuracy of the length: there is an error between the linear speed of the rolling material movement and the cold shearing op...

2023-10-30 Steel World Comments Off on Comparison of the advantages and disadvantages of various new chemical pipes in engineering applications

With the rapid development of our country’s economy and the continuous improvement of people’s living standards, people’s requirements for quality of life are also increasing day by ...

2023-10-30 Steel World Comments Off on What are the specifications of galvanized pipes?

In order to improve the corrosion resistance of steel pipes, general steel parts pipes (black pipes) are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electric...

2023-10-30 Steel World Comments Off on Ladle blowing argon stirring form

Ladle blowing with argon usually comes in two forms: (1) Bottom blown argon. Bottom-blown argon is mostly blown into the argon gas through a breathable brick installed at a certain position at the bot...

2023-10-30 Steel World Comments Off on Characteristics of Arc Cross Wedge Rolling Mill

The main advantages of the arc cross wedge rolling mill are simple structure, lighting weight and low equipment cost. Compared with the roller cross wedge rolling mill, it only needs to drive one roll...