Steel World

2021-10-25 Steel World Comments Off on The structure of the roll

Figure 1 Plane roll structure Figure 1-roll body; 2-roll neck; 3-shaft head (cross-shaped shaft head); D-roll body diameter; d-roll neck diameter; d1-shaft head outer diameter; L-roll body Length; l-r...

2021-10-25 Steel World Comments Off on What is W302 steel? What are the applications of W302 steel?

C carbon Cr chromium Mo molybdenum Mn manganese 0.32/0.45 4.75/5.5 1010/1.20 0.20/0.50　　W302 Factory state: soft reheating to 235HB (maximum) 　　Forging: forging at 1100°C to 900°C, returning to the fu...

2021-10-25 Steel World Comments Off on Application and Maintenance of Aggregate Heating System in Asphalt Mixing Station

The aggregate heating system of the asphalt concrete mixing station is composed of a burner and an aggregate heating drum. It is one of the key systems of the entire equipment. The reliability of the ...

2021-10-25 Steel World Comments Off on Production process of lean magnetite ore beneficiation

The lean magnetite ore in Anshan area is a lean magnetite ore with high silicon and low sulfur and phosphorus. The content of red and limonite is low, and the content of iron silicate and iron carbona...

2021-10-25 Steel World Comments Off on The main prerequisites that need to be confirmed before nitrogen purging

What are the main prerequisites that need to be confirmed before nitrogen purge? (1) Cut off the gas source, that is, shut off the valve or plug the blind plate, because a large amount of gas is const...

2021-10-25 Steel World Comments Off on Principle, structure, operation and maintenance of rotary vane vacuum pump

Use of rotary vane vacuum pump 1. Before use, the product manual for journalists should be carefully checked, and the shipping quality should be checked after unpacking. Collect the spare parts and te...

2021-10-25 Steel World Comments Off on The structure and application of large centrifugal pump

Due to the topographical characteristics of northern China, the pumping station lifts are all high, generally exceeding 1 MPa, and some are multi-stage pumping stations, and most of them use double-su...

2021-10-25 Steel World Comments Off on Pass and pass design

In the production of section steel, in order to obtain the required product shape and size, the billet is deformed in a series of annular holes composed of upper and lower rollers. The annular groove ...

2021-10-25 Steel World Comments Off on What is DC53 steel? What are the applications of DC53 steel?

C Carbon Si Silicon Mn Manganese V Vanadium P Phosphorus S Sulfur Cr Chromium Mo Molybdenum 1.000 1.000 0.350 2.000 0.002 0.003 8.000 2.000 Precision stamping dies: precision blanking dies for wire-cu...

2021-10-25 Steel World Comments Off on The mystery of several magical metals

Tungsten Tungsten (W) is the metal with the highest melting point, and its vapor pressure is still very low at a high temperature of 2000℃-2500℃. Tungsten has high hardness, high density and good high...

2021-10-25 Steel World Comments Off on China’s gear steel, bearing steel, spring steel production status and future development trends

1 Current status and development direction of gear steel When the gear is working, it is subject to various stresses such as variable load impact force, contact stress, pulsating bending stress and fr...

2021-10-25 Steel World Comments Off on Non-metallic inclusions in continuous casting slab

Non-metallic inclusions in continuous casting slabs can be divided into endogenous inclusions and foreign inclusions according to their generation methods. Endogenous inclusions. It mainly points out ...

2021-10-25 Steel World Comments Off on Trend of mold heat treatment technology

Mold manufacturing accuracy: uneven and incomplete structure transformation and excessive residual stress formed by heat treatment cause mold deformation during processing, assembly and mold use after...

2021-10-25 Steel World Comments Off on Waterproof hammer function of check valve in heating system

Abstract: In the hot water heating system. The phenomenon of water hammer exists objectively. In order to ensure the safety of the system, active preventive measures must be taken; to minimize the occ...

2021-10-19 Steel World Comments Off on What is HD steel? What are the applications of HD steel?

HD die steel is a kind of steel developed by China on the basis of UHBQR080 steel. HD die steel does not contain cobalt, and adds 1% nickel and trace niobium and boron. Its high temperature toughness,...

2021-10-19 Steel World Comments Off on Horizontal assembly rolls of section steel universal rolling mill

The section steel universal rolling mill is a multi-roll rolling mill with two pairs of rolls whose axes are perpendicular to each other in the same vertical plane. The typical roll series diagram is ...

2021-10-19 Steel World Comments Off on An Experimental Study on Oolitic Hematite Flocculation and Strong Magnetic Separation

1. Foreword According to statistics, China consumes more than 3 million tons of metal wear-resistant materials each year, of which only 100,000 tons of liners are consumed by metallurgical mines. At p...

2021-10-19 Steel World Comments Off on What is Cr2 steel? What are the application areas of Cr2 steel?

The size of the steel does not change much during heat treatment, quenching and tempering. Because of these characteristics, Cr2 steel is widely used in measuring tools such as sample plates, pallets,...

2021-10-19 Steel World Comments Off on Causes of metal splashing and prevention methods

When the content of TFe in the slag is too low, the slag is sticky, and the molten slag cannot return to the covering liquid surface in time after the molten pool is blown by the oxygen flow. The disc...

2021-10-19 Steel World Comments Off on New Process and New Technology of Iron Ore Electric Separation–Electric Characteristics of Minerals

The so-called electrical properties of mineral deposits refer to the resistance, dielectric constant, specific conductivity and rectification of the mineral deposits, which are the basis for judging w...

2021-10-19 Steel World Comments Off on The relationship between geometric tolerances and alternative applications

The national standard GB1182～1184 “Shape and Position Tolerance” includes shape tolerance-straightness, flatness, roundness, cylindricity, line profile, surface profile; orientation positi...

2021-10-19 Steel World Comments Off on What is T4 steel? What are the application areas of T4 steel?

High-speed tool steel: T4 Executive standard: ASTM A600-1992a ASTM T4 is a tungsten-based general cobalt-containing high-speed steel. Compared with W18Cr4V, the red hardness and high temperature hardn...

2021-10-19 Steel World Comments Off on Envelope extrusion

Sheath extrusion is an extrusion method in which liquid metal is coated on the core wire material. This method is specially used for cable sheathing, so it is also called cable sheathing extrusion. Th...

2021-10-19 Steel World Comments Off on What is the valve regulation organization

The adjustment mechanism is a device that converts the change in the output displacement of the actuator into a change in the flow area between the valve core and the valve seat of the control valve. ...

2021-10-19 Steel World Comments Off on Common misoperations and solutions in pump experiments

Abstract: Summarize some common wrong operations and solutions in pump test. The correct operation procedure that should be adopted in the performance test is also introduced by taking the open bench ...

2021-10-19 Steel World Comments Off on What is 08F steel? What are the application areas of 08F steel?

In 08F, F means rimmed steel, 08 means carbon content is 8/10000, 08F is the grade of 1006 steel. 08F steel has very low strength and hardness, and extremely high plasticity and toughness. It has good...

2021-10-18 Steel World Comments Off on Reasons for corrosion of slag splash adhesion layer

Experimental studies have shown that the resistance to melting loss of the slag splash layer is related to the TFe content in the slag splash layer. The higher the TFe content, the easier the slag spl...

2021-10-18 Steel World Comments Off on What is 9cr18mov steel? What are the applications of 9cr18mov steel?

9Cr18MoV steel has good rust resistance. It is a high-quality stainless steel currently used in the high-end batch tool market. Its strength and sharpness are better than ATS-34, and its chromium cont...

2021-10-18 Steel World Comments Off on Molten steel refining process

Patent No.: 98125048.3 Patentee: Baoshan Iron and Steel (Group) Company Technical Abstract: The present invention discloses a molten steel refining process, which belongs to the treatment method of mo...

2021-10-18 Steel World Comments Off on Function characteristics and selection of canned motor pump

4 F, m& ?: `2 ]$ `& F| Blue Pump Technology Forum With the development of the chemical industry and the improvement of people’s awareness of the environment and safety, the requirements for ch...

2021-10-18 Steel World Comments Off on Membrane technology application: flexible and economical water treatment techniques

Membrane technology is a new technology that can be used flexibly. This article introduces two application cases of membrane technology in practical engineering. The water supply department of Carmich...

2021-10-18 Steel World Comments Off on Internal cracks generated during straightening of continuous casting slab

In continuous casting production, the limiting factor to increase the drawing speed, One is that the billet may be deformed in the secondary cooling zone and break out of the crystallization zone; The...

2021-10-18 Steel World Comments Off on What is 4Cr13 steel? What are the application areas of 4Cr13 steel?

●Characteristics and scope of application: Note: This steel has poor weldability, so attention must be paid when using it. ●Chemical composition: Manganese Mn: ≤0.80 Sulfur S: ≤0.030 Phosphorus P: ≤0....

2021-10-18 Steel World Comments Off on GB T12241-2005 safety valve general conditions

1 Scope This standard specifies the terminology, design and performance requirements, testing, displacement determination, equivalent displacement calculation, marking and lead sealing, quality assura...

2021-10-18 Steel World Comments Off on Maintenance of mechanical seals for pumps

    There are many types of mechanical seals for maintenance pumps with mechanical seals, with different models, but there are mainly five leakage points: (l) the seal between the shaft sleeve and the...

2021-10-18 Steel World Comments Off on What is S50C steel? What are the applications of S50C steel?

Through the implementation of spheroidizing treatment, the cutting performance of this type of carbon steel can be improved. The steel is usually used after tempering to a hardness of 19~22HRC to incr...