Several common inoculants
Hello everyone, I am the youngest girl in the factory.
Welcome to my small science class.
Today we will talk about inoculants
Inoculation is an important link to improve the quality of cast iron.
After more than ten years of efforts,
my country's inoculants have basically achieved
serialization and commercialization.
Nowadays, domestic inoculants are mainly silicon and carbon silicon series.
Silicon-based inoculants have a low melting point and are suitable for
various molten irons with high carbon and low carbon,
and high sulfur and low...
The main method of spheroidization
Hello everyone, I am the youngest girl in the factory.
Welcome to my small science class.
Today we will talk about spheroidization
Generally, Ba and Bi are contained in as-cast ferrite spheroids,
and Ba and Sb are contained in as-cast pearlite spheroids,
but for important crankshaft castings above QT700-2,
no It is recommended to use Sb-containing nodularizer,
and the matrix should be controlled by
adjusting the content of Cu , Mo , etc.
It must be pointed out that no matter
whether the cast nodulizer is used or not,
inoculation is...
Three categories of slag remover #castingprocessing
Hello everyone, I am the youngest girl in the factory.
Welcome to my small science class.
Today we will talk about slag removal
The deslagging process can be carried out in a bag or in an induction furnace.
Sprinkle the slag remover on the liquid surface to
instantly form a molten layer,
which plays the role of covering and slag accumulation.
The slag remover is heated and expanded,
and many small holes are generated in the molten layer,
which plays a good role in heat preservation.
The slag remover is divided into three grades: low, medium...
Understand molten iron desulfurization
Hello everyone, I am the youngest girl in the factory.
Welcome to my small science class.
Today we will talk about desulfurization
Desulfurization of molten iron can reduce the amount of nodularizing agent
and the amount of sulfide slag inclusions in castings.
Almost all ductile iron production in developed countries
adopts desulfurization process,
which requires S≤0.01% after desulfurization.
Under the conditions of our country,
the target position is S≤0.02%.
Desulfurizers are divided into two categories:
CaC2 (calcium carbide)...
5 ways to handle molten iron before the furnace
Hello everyone, I am the youngest girl in the factory.
The Spring Festival holiday is over,
and our factory has resumed normal operations!
Welcome to my small class of popular science,
today we will talk about:
5 methods of treating molten iron before the furnace
Compared with cast steel and non-ferrous alloys,
cast iron has better casting properties.
It is easy to cast castings with complex shapes
and uneven wall thickness and less casting defects.
Therefore, the utilization rate of molten iron is high,
and the application of the...
Advantages of intermediate frequency furnace
Hello everyone, I am the youngest girl in the factory.
Do you remember this machine? Intermediate frequency furnace.
It is now smelting nodularizer.
The intermediate frequency furnace smelting nodularizing agent uses
raw materials such as ferrosilicon, magnesium and rare earth.
The working frequency of the intermediate frequency furnace
is between 50-2000HZ,
and it is widely used in the smelting of non-ferrous and ferrous metals.
Compared with other casting equipment,
the medium frequency induction furnace
has the properties of...
Continue to be a qualified casting person in 2022
Hello everyone, I am the youngest girl in the factory.
Follow me today to continue to visit the factory,
this is the process of making spheroidizers.
The masters are making products according to the customer's order.
In fact, the front-line work in the factory is really fortunate.
The masters are surrounded by the electric stove every day,
hot and tired. The current batch of goods is sent to Bangalore, India.
During the Spring Festival, due to the New Year holiday,
orders from foreign businessmen not only increased,
but also many orders...
Learn about the classification of nodularizers
Hello everyone, I am the youngest girl in the factory.
Welcome to my small science class.
After talking about the nodulizer many times,
it is found that there are many types of nodulizers.
Such as magnesium silicon alloys,
rare earth magnesium silicon alloys, calcium alloys,
nickel magnesium alloys, rare earth alloys, etc.
Today we will talk about lanthanum cerium rare earth nodularizer.
In the process of cast iron,
the additive that is added to the molten iron
to make the graphite spheroidized becomes a spheroidizing agent.
It...
ubiquitous ductile iron
Hello everyone, I am the youngest girl in the factory.
Welcome to my popular science class,
last week we talked about ductile iron,
which is stronger than carbon steel.
Many netizens will ask us privately, what is ductile iron used for?
In fact, ductile iron is very common in our lives,
but you may not recognize it when you see it.
Ductile iron has rapidly developed into a widely used cast iron material,
second only to gray cast iron.
The comprehensive performance of ductile iron is close to that of steel,
and it is officially based on its...
About casting materials, about casting industry, about casting people
Hello everyone, I am the youngest girl in the factory.
Before the Spring Festival,
I will give you a key knowledge of popular science:
how to choose the nodulizer scientifically.
(1) Magnesium content of 4%-5.5% is a low-magnesium nodularizing agent,
and RE is between 1%-2%, which is mostly used for
intermediate frequency furnace smelting and
spheroidizing treatment of low-sulfur molten iron.
(2) The magnesium content of 6%-7% belongs to
the medium magnesium series nodularizing agent,
which is mostly used in cupola, electric furnace double...
Learn five small skills, scientifically choose nodularizing agent
Hello everyone, I am the youngest girl in the factory.
There are still a few days before the Spring Festival.
The masters in our factory have all gone home for the holidays.
Years ago, we had already worked overtime to make all the orders,
packed them and sent them away.
The rest will be scheduled for next year~
Our factory mainly produces products such as nodularizing agent,
inoculant, vermicularizing agent, covering agent,
deoxidizer for steelmaking and alloy core wire for cast iron.
It's been 16 years this year
About foundry materials, about the...
What are the defects of ductile iron parts caused by the factors of nodularizing agent?
Hello everyone, I am the youngest girl in the factory.
Nodulizers and inoculants are mostly used in casting.
Do you know the difference between nodulizers and inoculants?
This is a nodularizing agent,
also called rare earth magnesium ferrosilicon alloy,
which can promote the crystallization of graphite
in ductile iron into spherical additives.
This is an inoculant, which can promote graphitization,
reduce the tendency of white mouth,
improve the shape and distribution of graphite,
increase the number of eutectic groups,
and refine the...
The difference between spheroidizer and inoculant
Hello everyone, I am the youngest girl in the factory.
What are the defects of ductile iron parts caused by
the factors of nodularizing agent?
(1) Graphite ball dissimilation
(2) Graphite floating
(3) Anti-white mouth
(4) subcutaneous needle hole
(5) Shrinkage cavity shrinkage
(6) Black slag
(7) Globalization decline
These defects are almost all related to the composition
and amount of the nodularizer,
but we cannot expect the nodulizer to solve all problems,
because the effect of the nodular element
and the amount of the nodulizer are both pros and...
Distinguish the relationship between ductile iron, nodularizing agent and inoculant
Hello everyone, I am the youngest girl in the factory.
Ductile iron is nodular graphite obtained by spheroidization and inoculation.
Effectively improve the mechanical properties of cast iron,
especially the plasticity and toughness, and obtain higher strength than carbon steel.
The technical key of high-quality ductile iron cast sword is:
optimizing graphite, strengthening matrix, and purifying crystal.
The key to affecting these three technologies lies in four major elements,
including spheroidization and inoculation treatment.
There are also three...
The ace product spheroidizer, inoculant
Hello everyone, I am the youngest girl in the factory.
Let's take a look, this is a sample of the latest nodulizer
and inoculant produced by our factory.
Many friends privately message me,
what is the difference between our spheroidizer and inoculant?
Nodulizer is an additive that makes graphite in cast iron crystallized into spherical shape.
Its main components are Si, Mg, Ce, Ca, etc.
The nodulizer commonly used in my country is ferrosilicon rare earth magnesium alloy.
Inoculant is an additive that can promote graphitization,
reduce the tendency of...
As the Spring Festival is approaching, foreign orders have increased
Hello everyone, I am the youngest girl in the factory.
This is about to be exported to Turkey.
Our factory masters have added several night shifts to produce,
and all third-party quality inspections have been completed and passed.
They are about to be shipped to the port to leave the country.
Foreigners do not celebrate the Spring Festival,
so although the Spring Festival is approaching,
orders from foreign businessmen have been increasing.
Our factory masters will have a holiday during the Spring Festival.
Therefore, all departments are...
What are the masters in the workshop doing
Hello everyone, I am the youngest girl in the factory.
As the Spring Festival is approaching,
our masters are still working on the front line,
busy arranging orders and working overtime.
These are the orders of goods waiting to be released after packaging.
Each batch of goods will be sampled and tested before leaving the factory,
and only those qualified will be loaded and shipped.
This is the inspection list of these batches of goods,
all of which meet the needs of customer orders.
The end of the year is approaching,
although customer demand...
Iron-carbon alloy materials for manufacturing large thickness parts - cast steel
Hello everyone, I am the youngest girl in the factory.
It's time for the popular science class again,
Today we are talking about the iron-carbon alloy material
used to manufacture parts with large thickness-cast steel.
Let's first understand the classification of cast steel.
Low-carbon steels with a carbon content of less than 0.2%:
medium-carbon steels with a carbon content between 0.2% and 0.5%;
high-carbon steels with a carbon content of more than 0.5%.
In addition, there are low-alloy steel and high-manganese steel.
The comprehensive mechanical properties of cast...
Today's popular science: vermicular graphite cast iron
Hello everyone, I am the youngest girl in the factory.
Let's talk about vermicular graphite cast iron.
The chemical structure of vermicular graphite cast iron
is similar to that of gray cast iron,
but the overall mechanical properties are slightly better than gray cast iron,
but slightly inferior to nodular cast iron.
Its impact toughness, elongation, compressive strength,
yield strength, etc.are all between the two,
and the change in wall thickness has a smaller effect
on the mechanical properties than gray cast iron.
Vermicular graphite cast iron...
Popular science: the most widely used cast iron
Hello everyone, I am the youngest girl in the factory.
Let's talk about this issue, gray cast iron.
Gray cast iron is cast iron containing flake graphite and
is the most widely used cast iron.
Because of its great sensitivity to the cooling rate,
gray iron castings often appear white and cracks on the thinner section,
and on the thicker section, it often leads to pine.
Due to the low thermal stability of gray cast iron,
it cannot be used to manufacture parts that
work in environments exceeding 250 degrees Celsius for a long time.
Inoculation with the...
The treasure of the foundry industry - ductile iron castings
Hello everyone, I am the youngest girl in the factory.
Today, let's talk about the treasure of
the foundry industry-ductile iron castings.
Ductile iron castings are important casting metal materials
developed in my country in the past 40 years.
Due to the small stress concentration caused by spheroidal graphite,
the fracture effect on the matrix is also small, so the tensile strength,
plasticity and toughness of ductile iron
are higher than other cast irons.
Of course, ductile iron castings are not perfect.
In addition to general casting...
