Specialized In Die Casting Service And Parts with Professional Design and Development

102,No.41,Changde Road,Xiaojiejiao,Humen Town,Dongguan,China | +86 769 8151 9985 | sales@hmminghe.com

Measures to reduce the content of hydrogen, oxygen and nitrogen in steel

Publish Time: Author: Site Editor Visit: 1956

   Generally, clean steel refers to a steel grade that has a low content of five major impurity elements (S, P, H, O, N) in steel, and strictly controls non-metallic inclusions (oxides, sulfides) in the steel. The general measures to reduce the content of [H], [O] and [N] in steel include:

  1, [H] content

  (1) Vacuum degassing

"Reducing PH2 can reduce the solubility of hydrogen in steel, so vacuum degassing can be used to reduce the content of [H] in steel.

  (2) Reduce the moisture content of the material

  80% of the hydrogen in molten steel comes from raw materials, refractory materials and moisture in the atmosphere. Attention should be paid to the baking of ladle, tundish, ferroalloy, auxiliary materials, especially lime.

   In addition, the direct contact of molten steel with the atmosphere should be reduced: the molten steel after vacuum treatment should avoid powering up again, and the argon pressure should be controlled to prevent the molten steel from being exposed; at the same time, protection should be done during pouring.

  2, [N] content

   is similar to the method of reducing [N] content in steel. In the control to reduce the [N] content in steel, in addition to vacuum treatment of molten steel and reducing the contact of molten steel with the atmosphere, the focus is on the control of alloy content.

During operation, the elements that reduce the nitrogen content in steel (Si, Ni) are increased to the upper limit of the specification, and the elements that increase the nitrogen content in steel (Mn, Cr, Mo, V, Nb) are controlled within a certain range as far as possible to reduce Its negative effects.

  3, [O] content

  (1) Out-of-furnace refining of molten steel

  The refining process can remove about 80% of the inclusions in the molten steel.

  (2) Improve the control accuracy of the C content at the end point of the electric furnace

   Try to improve the end point control accuracy when blowing oxygen in the electric furnace to reduce overblowing.

  (3) Prevent slagging

  The technology of slag flowing before tapping, eccentric bottom tapping and sufficient molten steel reserved in the furnace is adopted to prevent slagging.

  (4) Deoxidizer control

  A. Reasonable order of joining. The order of adding deoxidizer is as follows: before tapping, add a small amount of Fe-Mn in the ladle, add Fe-Si after tapping, and use a wire feeder to feed Al when refining outside the refining station.

  B. Appropriate Mn/Si ratio. When Mn/Si>2.5, typical MnO-SiO2 is formed and easily rises.

  C. Appropriate Al content range. When [Al] = 00.01-0.02%, the corresponding T[O] is the lowest.

  D, final deoxygenation. In order to strengthen deoxidation, Si-Ca is used for final deoxidation after refining.

  (5) Control the slag well

   Control the slag composition, temperature, and slag amount to improve the ability of inclusions to dissolve in the slag phase.

  (6) Suitable stirring intensity

  Appropriate agitation is used to emphasize that inclusions can be removed without involving steel slag in molten steel. In addition, soft argon blowing can be used before the refining is finished.


Please keep the source and address of this article for reprinting: Measures to reduce the content of hydrogen, oxygen and nitrogen in steel


Minghe Die Casting Company are dedicated to manufacture and provide quality and high performance Casting Parts(metal die casting parts range mainly include Thin-Wall Die Casting,Hot Chamber Die Casting,Cold Chamber Die Casting),Round Service(Die Casting Service,Cnc Machining,Mold Making,Surface Treatment).Any custom Aluminum die casting, magnesium or Zamak/zinc die casting and other castings requirements are welcome to contact us.

ISO90012015 AND ITAF 16949 CASTING COMPANY SHOP

Under the control of ISO9001 and TS 16949,All processes are carried out through hundreds of advanced die casting machines, 5-axis machines, and other facilities, ranging from blasters to Ultra Sonic washing machines.Minghe not only has advanced equipment but also have professional team of experienced engineers,operators and inspectors to make the customer’s design come true.

POWERFUL ALUMINUM DIE CASTING WITH ISO90012015

Contract manufacturer of die castings. Capabilities include cold chamber aluminum die casting parts from 0.15 lbs. to 6 lbs., quick change set up, and machining. Value-added services include polishing, vibrating, deburring, shot blasting, painting, plating, coating, assembly, and tooling. Materials worked with include alloys such as 360, 380, 383, and 413.

PERFECT ZINC DIE CASTING PARTS IN CHINA

Zinc die casting design assistance/concurrent engineering services. Custom manufacturer of precision zinc die castings. Miniature castings, high pressure die castings, multi-slide mold castings, conventional mold castings, unit die and independent die castings and cavity sealed castings can be manufactured. Castings can be manufactured in lengths and widths up to 24 in. in +/-0.0005 in. tolerance.  

ISO 9001 2015 certified manufacturer of die cast magnesium and mold manufacturing

ISO 9001: 2015 certified manufacturer of die cast magnesium, Capabilities include high-pressure magnesium die casting up to 200 ton hot chamber & 3000 ton cold chamber, tooling design, polishing, molding, machining, powder & liquid painting, full QA with CMM capabilities, assembly, packaging & delivery.

Minghe Casting Additional Casting Service-investment casting etc

ITAF16949 certified. Additional Casting Service Include investment casting,sand casting,Gravity Casting, Lost Foam Casting,Centrifugal Casting,Vacuum Casting,Permanent Mold Casting,.Capabilities include EDI, engineering assistance, solid modeling and secondary processing.

Casting Parts Application Case Studies

Casting Industries Parts Case Studies for: Cars, Bikes, Aircraft, Musical instruments, Watercraft, Optical devices, Sensors, Models, Electronic devices, Enclosures, Clocks, Machinery, Engines, Furniture, Jewelry, Jigs, Telecom, Lighting, Medical devices, Photographic devices, Robots, Sculptures, Sound equipment, Sporting equipment, Tooling, Toys and more. 


What Can we help you do next?

∇ Go To Homepage For Die Casting China

Casting Parts-Find out what we have done.

→Ralated Tips About Die Casting Services


By Minghe Die Casting Manufacturer |Categories: Helpful Articles |Material Tags: , , , , , ,Bronze Casting,Casting Video,Company History,Aluminum Die Casting |Comments Off

MingHe Casting Advantage

  • Comprehensive Casting design software and skilled engineer enables sample to be done within 15-25 days
  • Complete set of inspection equipment & quality control makes excellent Die Casting products
  • A fine shipping process and good supplier guarantee we can always deliver Die Casting goods on time
  • From prototypes to end parts, upload your CAD files, fast and professional quote in 1-24 hours
  • Wide-ranging capabilities for designing prototypes or massive manufacturing end use Die Casting parts
  • Advanced Die Casting techniques (180-3000T Machine,Cnc Machining, CMM) process a variety of metal & plastic materials

HelpFul Articles

Measures to reduce the content of hydrogen, oxygen and nitrogen in steel

Generally, clean steel refers to a steel grade that has a low content of five major impurity element

Collection of common defects and preventive measures in carburizing and quenching

Carburizing and quenching is actually a composite process, namely carburizing + quenching. We are of

Measures and Suggestions to Solve the Subcutaneous Porosity of Castings

The generation of subcutaneous pores is a comprehensive reaction of improper operation of various li

The Measures To Improve Continuous Casting Tundish Life

The life of the continuous casting tundish determines the index of the number of continuous casting

The Concrete Measures To Solve The Sticky Mold Defects Of Die Casting

The hazards of sticking mold defects to castings are: when the die castings are stuck to the mold, t

The Solutions And Preventive Measures For Aluminum Die Casting 10 Major Defects

There are stripes on the surface of the casting that are consistent with the flow direction of the m

The Measures To Improve The Life Of Aluminum-Magnesium Alloy Die Casting Mold

As an important processing equipment, aluminum-magnesium alloy die-casting molds have a direct impac

Three Measures To Overcome Aluminum Alloy Surface Cracks

In production and life, cracks often appear on the surface of aluminum alloys. The key to this probl

The Main Technical Measures Of Low Cost Ironmaking

With the rapid development of China's iron and steel industry, China's annual pig iron production re

The Measures To Improve High Anti-Collapse Casing Life

The problem of casing damage seriously restricts oil and gas production, reduces the production life

The Measures To Improve The Quality Of Carbon-Manganese Steel Rudder Stock

The rudder stock is the shaft on which the rudder blades rotate. The rudder blades are rotated by th

The Reasonable Measures To Steel Plate Control Delamination Defects

The analysis believes that the root cause of the inconsistent flaw detection is the internal segrega

The Analysis Of Measures For Blast Furnace Hearth Longevity

The blast furnace is forced to take measures to protect the furnace due to problems with the longevi

The Control Measures For Net-Like Cracks In Round Billets

In continuous casting production, network cracks sometimes appear on the surface of round billets. T

The Measures To Prevent Coarse Grains Of Castings

Coarse crystal grains of castings refer to defects that show excessively coarse grain structure and

The Measures To Increase Sinter Output In China

It is assumed that the raw material sintering plant has 8 belt sintering machines (1×174 m2, 1×150 m

The Measures To Reduce Energy Consumption Of Sintering Ignition

The energy consumption of the sintering process accounts for about 10% of the total energy consumpti

The Measures To Improve The Quality Of SWRCH22A Wire Rod

SWRCH22A is a kind of hot-rolled non-twist and controlled cooling wire rod. Mainly used to manufactu

The Control Measures of Spatter In CO2 Gas Shielded Welding

In the current ferrous metal materials, CO2 gas shielded welding is one of the most important weldin

How to improve the casting process measures of the spheroidization rate

The spheroidization level of domestic ordinary spheroidal graphite cast iron castings is required to

The Problems And Countermeasures Of Cutting Fluid Deterioration-Smell

The main reason for the deterioration and smell of cutting fluid is that the cutting fluid contains

Low-Pressure Casting Process-Three-Point Targeted Measures To Prevent Waste

In low pressure casting, the mold is placed on a closed holding furnace, and the cavity is communica

The Measures And Effects Of Nitrogen Increase In High Nitrogen Stainless Steel Melting

High-nitrogen stainless steel refers to a steel with a ferrite matrix with a nitrogen content of mor

The Main Technical Measures For Low-Cost Ironmaking

With the rapid development of my country's steel industry, my country's annual pig iron output reach

The Control Measures Of Strip Defects On Cold Rolled Sheets Surface

Strip defect is a serious metallurgical defect on the surface of cold-rolled sheet. This type of def