CN102851593B - Low carbon cast steel pellet - Google Patents
Low carbon cast steel pellet Download PDFInfo
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- CN102851593B CN102851593B CN201210222276.5A CN201210222276A CN102851593B CN 102851593 B CN102851593 B CN 102851593B CN 201210222276 A CN201210222276 A CN 201210222276A CN 102851593 B CN102851593 B CN 102851593B
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Abstract
It is an object of the invention to by optimization chemical composition including the amount of micro constitutent, it is provided that a kind of cost of material is cheap and the shape of ball uniformly, the Low carbon cast steel pellet that deviation is less and blast cleaning ability is stable of metal structure, hardness.The present invention provides a kind of Low carbon cast steel pellet, it is characterized in that, this Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, below P:0.05%, below S:0.05%, remainder is only made up of Fe and inevitable impurity.
Description
Technical field
The present invention relates to a kind of carbon cast steel ball.Say in further detail, the present invention relates to the shape of a kind of ball uniformly, metal group
Knit less with the deviation of hardness and that blast cleaning ability is stable Low carbon cast steel pellet.
Background technology
In the past, cast steel ball was applied to purposes widely.Headed by the sand removal of foundry goods, cast steel ball is mainly used in ferrum system gold
Belong to the purposes widely such as the burr removal of material, attachment removal, oxide-film removal.
Cast steel ball is generally divided into high carbon cast steel ball and Low carbon cast steel pellet, and its chemical composition and quality have been carried out mark
Standardization, such as Japan are at JIS Z0311(2004) in have regulation.
Owing to high carbon cast steel ball contains the C of 0.80%～1.2%, it is possible to increase quenching hardness, therefore, it is possible to it is carried out
Mechanicalness is pulverized and is manufactured cutting metal.Owing to cutting metal is widely applied at the large-scale gang saw etc. for cutting off the stone materials such as marble
In, the advantage that therefore high carbon cast steel ball has the needs that can meet cutting metal.Thus, high carbon cast steel ball is
It is universal.
On the other hand, Low carbon cast steel pellet contains the C of 0.08%～0.20%, is set higher by Mn to improve hardenability
It is set to 0.35%～1.5%, thus has and utilizing the pulverizing motlten metals such as water spray (water jet), centrifugal force to manufacture ball
Form this feature of metal structure based on bainite, it is possible to obtain Hv390～about 520 (Vickers the stage of grain
Hardness) hardness.Therefore, Low carbon cast steel pellet have need not image height carbon cast steel ball like that implement quenching, tempering heat treatment this
The advantage of sample.It addition, in the case of high carbon cast steel ball, manufacture pill utilizing the pulverizing motlten metals such as water spray, centrifugal force
Stage, pill is prone to crack (hardening flaw), but cracks, therefore owing to being difficult in the case of Low carbon cast steel pellet
This Low carbon cast steel pellet is acknowledged as excellent durability.
Low carbon cast steel pellet has the advantage that need not implement heat treatment as described above, but on the other hand, it is significantly
Depend on chemical composition.But, in standard, the scope of the chemical composition of defined is the widest.At JIS Z0311(2004) in, with
Quality % is counted, and chemical composition is following scope.C:0.08～0.20, Si:0.10～2.0, Mn:0.35～1.5, P:0.05 with
Under, below S:0.05.
It addition, at the GB/T 18838.4(2008 of China) in, the scope to chemical composition identically with JIS Z0311
Carry out standardization.
Generally, the element maximum on the hardenability impact of cast steel is C, along with the increase of C%, hardenability and quenching hardness
Rise.But, owing to C% is relatively low in Low carbon cast steel pellet, therefore for the purpose of raising hardenability, replace C and set higher
Determine Mn, Si.But, it is all the element extremely strong with the combining power of oxygen due to Mn, Si, motlten metal is prone to oxidation, therefore there are
Following problem, i.e. the shape of ball is poor, forms the spindle beyond approximately spherical, the ratio of bar-shaped such non-spherical granule
Higher, and then make blast cleaning ability unstable.
As the prior art of the chemical composition improving Low carbon cast steel pellet, propose there is the following chemical composition that with the addition of Ni
(patent documentation 1).
C:0.15～0.30, Si:0.30～0.80, Mn:0.40～1.0, Ni:0.80～1.20.
The chemical composition of patent documentation 1 decreases the addition of Si and Mn as the element being prone to oxidation, and newly adds
Add Ni, thus inferred that this chemical composition ensure that hardenability.
Patent documentation 1: No. 2670281 publications of U.S. Patent No.
There is JIS Z0311(2004) in defined chemical composition Low carbon cast steel pellet in, in order to improve quenching
Property and set Mn, Si higher, but be all the alloying element extremely strong with the chemical combination of oxygen due to Mn, Si, motlten metal is prone to
Oxidation, therefore there are following problem, i.e. the shape of ball is poor, forms the spindle beyond approximately spherical, bar-shaped such non-
The ratio of spherical particle is higher.
In patent documentation 1, with the addition of the Ni of 0.80%～1.20%, but the Ni alloy unit that to be price of a relatively high
Element, thus there are and cause cost of material to rise such problem.Although it addition, obtaining HRC described in patent documentation 1
The hardness of (Rockwell hardness) 45 and excellent durability, but shape, the metal structure of ball is not recorded, and it is detailed
In confused situation.
Summary of the invention
It is an object of the invention to by optimization chemical composition including the amount of micro constitutent, it is provided that a kind of
Cheap and ball the shape of cost of material is uniform, the low-carbon (LC) that deviation is less and blast cleaning ability is stable of metal structure, hardness
Cast steel ball.
The present invention makes to reach above-mentioned purpose, finds to set lower the addition of Si, Mn and appropriate
It is extremely effective for reaching above-mentioned purpose that ground adds Cr, thus completes the present invention.
The Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: in terms of quality %,
C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, P:0.05% with
Under, below S:0.05%, remainder only by Fe and inevitably impurity constitute (technical scheme 1).
It addition, it is further preferred that the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemistry
Composition: in terms of quality %, C:0.13%～0.22%, Si:0.15%～0.25%, Mn:0.5%～0.90%, Cr:0.4%
～0.8%, below P:0.03%, below S:0.03%, remainder only by Fe and inevitably impurity constitute (technical side
Case 2).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that Ni and Cu is constituted add up to 0.4%～1.0%, below P:0.05%, S:0.05%
Hereinafter, remainder is only constituted (technical scheme 3) by Fe and inevitable impurity.
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, Mo:
0.10%～0.30%, below P:0.05%, below S:0.05%, remainder is only made up of Fe and inevitable impurity
(technical scheme 4).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that Ni and Cu is constituted add up to 0.4%～1.0%, Mo:0.10%～0.30%, P:
Less than 0.05%, below S:0.05%, remainder is only constituted (technical scheme 5) by Fe and inevitable impurity.
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, Al:
0.04%～0.12%, below P:0.05%, below S:0.05%, remainder is only made up of Fe and inevitable impurity
(technical scheme 6).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that Ni and Cu is constituted add up to 0.4%～1.0%, Mo:0.10%～0.30%, Al:
0.04%～0.12%, below P:0.05%, below S:0.05%, remainder is only made up of Fe and inevitable impurity
(technical scheme 7).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, B:
0.001%～0.05%, below P:0.05%, below S:0.05%, remainder is only by Fe and inevitable impurity structure
Become (technical scheme 8).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that Ni and Cu is constituted add up to 0.4%～1.0%, Mo:0.10%～0.30%, Al:
0.04%～0.12%, B:0.001%～0.05%, below P:0.05%, below S:0.05%, remainder only by Fe and
Inevitably impurity constitutes (technical scheme 9).
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that V, Nb and Ti are constituted add up to 0.05%～0.5%, below P:0.05%, S:
Less than 0.05%, remainder is only constituted (technical scheme 10) by Fe and inevitable impurity.
It addition, the Low carbon cast steel pellet of the present invention is characterised by, this Low carbon cast steel pellet has following chemical composition: with matter
Amount % meter, C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, from by
More than one elements selected in the group that Ni and Cu is constituted add up to 0.4%～1.0%, Mo:0.10%～0.30%, Al:
0.04%～0.12%, B:0.001%～0.05%, more than one elements of selecting from the group being made up of V, Nb and Ti
Add up to 0.05%～0.5%, below P:0.05%, below S:0.05%, remainder is only by Fe and the most miscellaneous
Matter constitutes (technical scheme 11).
The Low carbon cast steel pellet of the present invention is characterised by, (1) this Low carbon cast steel pellet has following chemical composition: with quality %
Meter, containing C:0.1%～0.25%, Si:0.1%～0.3%, Mn:0.4%～1.0%, Cr:0.3%～1.0%, P:
Less than 0.05%, below S:0.05%, remainder is only made up of Fe and inevitable impurity.
It addition, it is further preferred that the Low carbon cast steel pellet of the present invention is characterised by, (2) this Low carbon cast steel pellet has as follows
Chemical composition: in terms of quality %, containing C:0.13%～0.22%, Si:0.15%～0.25%, Mn:0.5%～0.9%,
Cr:0.4%～0.8%, below P:0.03%, below S:0.03%, remainder is only by Fe and inevitable impurity structure
Become.
The invention still further relates to, (3) a kind of Low carbon cast steel pellet described in above-mentioned (1) or (2), in terms of quality %, this low-carbon (LC) is cast
Shot contains Ni and Cu:0.4%～1.0% with independent or total.
The invention still further relates to, (4) a kind of Low carbon cast steel pellet described in above-mentioned (1), this Low carbon cast steel pellet, in terms of quality %, contains
There is Mo:0.10%～0.30%.
The invention still further relates to, (5) a kind of Low carbon cast steel pellet described in above-mentioned (2), this Low carbon cast steel pellet, in terms of quality %, contains
There is Mo:0.10%～0.30%.
The invention still further relates to, (6) a kind of Low carbon cast steel pellet described in above-mentioned (3), this Low carbon cast steel pellet, in terms of quality %, contains
There is Mo:0.10%～0.30%.
The invention still further relates to, (7) a kind of Low carbon cast steel pellet described in above-mentioned (1), this Low carbon cast steel pellet, in terms of quality %, contains
There is Al:0.04%～0.12%.
The invention still further relates to, (8) a kind of Low carbon cast steel pellet described in above-mentioned (2), this Low carbon cast steel pellet, in terms of quality %, contains
There is Al:0.04%～0.12%.
The invention still further relates to, (9) a kind of Low carbon cast steel pellet described in above-mentioned (3), this Low carbon cast steel pellet, in terms of quality %, contains
There is Al:0.04%～0.12%.
The invention still further relates to, (10) a kind of Low carbon cast steel pellet described in above-mentioned (4), this Low carbon cast steel pellet in terms of quality %,
Containing Al:0.04%～0.12%.
The invention still further relates to, (11) a kind of Low carbon cast steel pellet according to any one of above-mentioned (1), (2), (4)～(10), should
Low carbon cast steel pellet is in terms of quality %, containing B:0.001%～0.05%.
The invention still further relates to, (12) a kind of Low carbon cast steel pellet according to any one of above-mentioned (1), (2), (4)～(10), should
Low carbon cast steel pellet in terms of quality %, containing in V, Nb and Ti more than one elements add up to 0.05%～0.5%.
The invention still further relates to, (13) a kind of Low carbon cast steel pellet described in above-mentioned (11), this Low carbon cast steel pellet in terms of quality %,
Containing in V, Nb and Ti more than one elements add up to 0.05%～0.5%.
It addition, the Low carbon cast steel pellet of the present invention is characterised by, make utilizing the pulverizing motlten metals such as water spray, centrifugal force
The stage making pill is formed with the metal structure based on bainite, thus obtains Hv400's～about 520 (Vickers hardness)
Hardness.Therefore, Low carbon cast steel pellet need not image height carbon cast steel ball and implements quenching, the heat treatment of tempering like that, by with 130 DEG C～
The low temperature of about 280 DEG C implements temper, it is possible to removes the residual stress produced in the stage manufacturing pill, or carries out gold
Belong to tissue, the inching of hardness.
According to the present invention, this Low carbon cast steel pellet is following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:
0.1%～0.3%, Mn:0.40%～1.0%, Cr:0.3%～1.0%, below P:0.05%, below S:0.05%, residue
Part the most only by Fe and inevitably impurity constitute, have more at most make the shape of ball deteriorate if setting amount lower
The amount of Si, Mn of tendency, and add in right amount and improve the Cr that the effect of hardenability is higher, seek containing of C, Si, Mn, Cr
The optimization of amount such that it is able to provide the shape of a kind of ball uniformly, the deviation of metal structure, hardness is less and blast cleaning ability
Stable Low carbon cast steel pellet.
In the present invention, in the case of the amount of C is less than 0.1%, hardness becomes less than Hv400, makes blast cleaning energy
Power reduce, if the amount of C is more than 0.25%, can in the metal structure based on bainite martensite increase, need into
Row tempering, is therefore located at the amount of C in the range of 0.1%～0.25%.
It addition, in the case of the amount of Si is less than 0.1%, the deoxidation effect of motlten metal is insufficient and makes internal lacking
Falling into (hole) to increase, if the amount of Si is more than 0.3%, the shape of ball can gradually degrade, and is therefore located at by the amount of Si
In the range of 0.1%～0.3%.
And, in the case of the amount of Mn is less than 0.40%, hardenability is insufficient and to make a part for ball contain soft
Soft pearlitic structrure, therefore makes hardness less than Hv400, if the amount of Mn is more than 1.0%, the shape of ball drastically deteriorates, because of
The amount of Mn is located in the range of 0.40%～1.0% by this.
In addition, the amount of Cr is set as the amount of slightly lower than Si and Mn, to make up the hardenability of reduction
For the purpose of the amount of Cr is investigated, its result, in the case of the amount of Cr is less than 0.3%, improve hardenability
Effect insufficient, be therefore mixed into the hardness ball less than Hv400, if the amount of Cr is more than 1.0%, in metal structure
Form the carbide of Cr and make toughness reduce, therefore the amount of Cr is located in the range of 0.3%～1.0%.
It addition, P and S is the harmful element making the toughness of steel reduce, need to suppress below 0.05% its amount.
It addition, for the quality stablizing ball as described above further, it is preferred that this Low carbon cast steel pellet has followingization
Learn composition: in terms of quality %, only by C:0.13%～0.22%, Si:0.15%～0.25%, Mn:0.50%～0.9%, Cr:
0.4%～0.8%, below P:0.03%, below S:0.03% are constituted, and remainder is only by Fe and inevitable impurity structure
Become.
The present invention is in addition to C, Si, Mn, Cr, P, S of predetermined ratio, moreover it is possible to containing Ni, Cu, Mo, Al, B, V, Nb and Ti
In more than one elements.
In the present invention, Low carbon cast steel pellet is in terms of quality %, containing the one selected from the group being made up of Ni and Cu
Above element add up to 0.4%～1.0% such that it is able to do not make ball shape deteriorate in the case of improve hardenability, and
And improve toughness.Although the effect of the raising hardenability brought by interpolation Ni and Cu is the most notable not as Cr, but due to
Ni and Cu is the alloying element being difficult to aoxidize, and therefore having confirmed it will not have undesirable effect the shape of ball.At Ni and Cu
Individually or the amount that adds up to less than 0.4% in the case of effect insufficient, if the amount of Ni and Cu is more than 1.0%, can
Reduce the effect improving toughness, therefore the amount that is independent or that add up to of Ni and Cu is located in the range of 0.4%～1.0%.
It addition, in the present invention, Low carbon cast steel pellet is in terms of quality %, containing Mo:0.10%～0.30% such that it is able to enter
One step reduces metal structure, the deviation of hardness, it is possible to make steady quality.Mo is to be only second to Mn can improve the hardenability of steel efficiently
Useful alloying element, but due to for economic aspect the price of Mo higher, at the amount of Mo less than 0.10%
In the case of, effect is insufficient, if the amount of Mo is more than 0.30%, only obtains the effect of cost increase, therefore containing Mo
Amount is located in the range of 0.10%～0.30%.
It addition, in the present invention, Low carbon cast steel pellet is in terms of quality %, containing Al:0.04%～0.12% such that it is able to send out
Waving the deoxidation effect of the appropriateness brought by Al, if improving the shape of ball, internal flaw (hole) can be reduced simultaneously.Al's
In the case of amount is less than 0.04%, the effect improving shape is insufficient, if the amount of Al is more than 0.12%, makes shape
Deterioration, is therefore located at the amount of Al in above-mentioned scope.
It addition, in the present invention, Low carbon cast steel pellet is in terms of quality %, containing B:0.001%～0.05%, thus improves and quenches
Fire, and make metal structure miniaturization improve toughness.In the case of the amount of B is less than 0.001%, effect is not filled
Point, if the amount of B is more than 0.05%, toughness slightly reduces, and therefore the amount of B is located at the model of 0.001%～0.05%
In enclosing.
It addition, in the present invention, Low carbon cast steel pellet is in terms of quality %, containing selecting from the group being made up of V, Nb and Ti
More than one elements add up to 0.05%～0.5% such that it is able to make crystal grain miniaturization improve toughness.When above-mentioned element
Amount less than 0.05% in the case of effect insufficient, if the amount of above-mentioned element is more than 0.5%, above-mentioned element
Form carbide and make toughness reduce, therefore the amount of above-mentioned element is located in the range of 0.05%～0.5%.
Accompanying drawing explanation
Fig. 1 is represent the Low carbon cast steel pellet (embodiment) of the present invention and the Low carbon cast steel pellet as comparative example average hard
Degree, the figure of deviation range (maximum～minima) of hardness.
Detailed description of the invention
Hereinafter, the test example (embodiment comparative example) carried out to confirm the effect of the present invention is described.
Test example 1
In this test example, in order to investigate the impact of C, Si, Mn, Cr, P, S, Ni and Cu, Mo, with steel cuttings, Fe Si,
Fe Mn, Fe Cr, Fe Mo, electrolysis Ni, fine copper bits (electric wire), carburant (Japanese: add raw material of wood-charcoal) etc. are raw material, to be formed
Proportioning raw materials is adjusted by the mode of desired constituents, and uses the experiment high frequency of melting amount 100kg with ferrum conversion to melt
Stove melts.
Fusion temperature is set to 1650 DEG C～1680 DEG C, utilizes water to send legal system forth and make ball.The ball making acquisition is right after being dried
It sieves, and takes out Φ 1mm(and remains in the ball in the sieve of 1.00mm through the sieve of 1.18mm) ball of size, evaluate
Its quality etc..Its result is shown in Table 1 below.
Table 1
The method utilizing defined in JIS Z0311 measures porosity, non-spherical granule rate, hardness.That is, porosity is
The ratio of the following ball granule obtained, i.e. when being embedded in resin by ball granule and being ground, then utilizing magnifier pair
When grain section is observed, the area shared by hole is the ratio of the ball granule of more than the 10% of the sectional area of this ball granule.
The quantity of observed ball granule is set to 100.
Non-spherical granule rate is the ratio of the following granule obtained, i.e. when being scattered on glass plate by ball granule and sharp
When observing ball granule with magnifier, the major diameter of ball granule is the ratio of the granule of more than 2 times of minor axis.By observed
The quantity of ball granule is set to 100.
Hardness is the Vickers hardness of the grain section being embedded in resin by ball granule and being ground and measure.Will examination
Test load and be set to 9.8N, the load time is set to 12 seconds, obtain the meansigma methods of effective 20 measured values.It addition, at table 1
In, represent minima～the maximum of measured value in bracket, and in FIG, the deviation of hardness is carried out graph representation.
About the life-span of ball, carry out SAE(Society of Automotive Engineers, Inc.) in J 445
The impact grinding test of defined.That is, the ball 100g of above-mentioned Φ 1mm is put in assay device, make this ball with the speed of 60m/s
Degree and wear-resistant casting target made of iron impact several times, often screening out after certain collision frequency, (sieve using 0.3mm) is broken
Broken ball, and measure the weight of residual ball, test being carried out to remaining ball is initial less than 30%.
By to representing that between the collision frequency obtained by this test and residual ball part by weight, the curve of relation is integrated
And the numerical value obtained is as life value.It addition, life-span shown in table 1 than be set to the life value by embodiment 1 100 situation
Ratio be indicated, its be expressed as the life-span than value the biggest durability the best and toughness is the highest.
About chemical composition, utilize emission spectrometer (Japanese: light spectrum analysis method) (ICP, Shimadzu Seisakusho Ltd. manufacture,
Model ICPS 7500) composition of ball self of trial-production is analyzed.
After ball granule is embedded in resin and is ground, (2% nitric acid ethanol is molten to utilize nital
Liquid) it is etched, use the metal structure of metal microstructure sem observation ball.
The embodiment 1 of table 1～the chemical composition of embodiment 2 presentation technology scheme 1.With as conventional Low carbon cast steel pellet
Comparative example 1～comparative example 2(do not contain the chemical composition of Cr) compare, embodiment 1～embodiment 2 porosity reduction about 1/2, non-
Spherical particle rate becomes about the 1/3～1/4 of comparative example 1～comparative example 2, and the shape of this Low carbon cast steel pellet is changed significantly
It is apt to, and life-span ratio also improves about 11%～13%.
With comparative example 1～comparative example 2(bainite shape tissue) compared with, the metal structure (bayesian of embodiment 1～embodiment 2
Body shape tissue) overall fine and uniform, and confirmed and be improved by the hardenability containing Cr and metal structure.Separately
Outward, having confirmed following tendency, i.e. if Mn is more than 1% as the comparative example 1, non-spherical granule rate increases, if such as comparative example 2
The ground identical with Mn more than 0.5% of Si like that non-spherical granule rate increases.
Comparative example 3～comparative example 7 represent so that the amount of Si, Mn, Cr deviates the scope of the chemical composition of technical scheme 1
Mode have adjusted the result in the case of chemical composition.Wherein, the amount at Si has exceeded the ratio of 0.3% as higher limit
In relatively example 3, making non-spherical granule rate more than 5%, life-span ratio also reduces.
It addition, in 0.4% i.e. comparative example 4 of the amount deficiency lower limit of Mn, compared with embodiment 1～embodiment 2
Porosity increases, and hardness reduces.Its reason, it is contemplated that be, owing to the amount of Mn is very few, therefore makes deoxidation effect, quenching
Property reduce.
In the amount of Mn has exceeded the comparative example 5 of 1.0% of higher limit, identical with comparative example 1, make non-spherical granule
Rate increases, and life-span ratio reduces.
It addition, in 0.3% i.e. comparative example 6 of the amount deficiency lower limit of Cr, by the amount of Si with Mn is set
Being scheduled in suitable scope, voidage and non-spherical granule rate are in same level compared with embodiment 1～embodiment 2, but
It is that hardness reduces, and the deviation of hardness increases, thus life-span ratio reduces.It addition, the amount at Cr has exceeded higher limit
In the comparative example 7 of 1.0%, hardness somewhat increases and life-span ratio reduces.It can be said that if the amount of Cr is crossed at least, hardenability is not
Foot, forms carbide at most if the amount of Cr is crossed and makes toughness reduce.
The metal structure of comparative example 3～comparative example 7 is bainite shape tissue.
Embodiment 3 presentation technology scheme 1 or the chemical composition of technical scheme 2.In technical scheme 2, in order to make the matter of ball
Amount stabilisation, is set in the amount of Si, Mn, Cr in narrower scope.Compared with embodiment 1～embodiment 2, implement
The porosity of example 3, non-spherical granule rate, life-span ratio the most slightly improve.It addition, about P and S, as long as owing to using usually
The amount of P and S just can be dropped to less than 0.03% by the raw materials such as the steel cuttings obtained, and the simpliest eliminates so that P and S
Amount be 0.03%～0.05% mode adjust the test that chemical composition compares.The metal structure of embodiment 3 is
Bainite shape tissue.
Embodiment 4～the chemical composition of embodiment 6 presentation technology scheme 3.Above-described embodiment represents and adds individually or simultaneously
Result in the case of Ni Yu Cu, its porosity and hardness are in same level compared with embodiment 1～embodiment 3, but right and wrong
Spherical particle rate is slightly improved, and life-span ratio improves about 5%.The metal structure of embodiment 4～embodiment 6 is bainite
Shape tissue.
On the other hand, in the total amount comparative example 8 less than 0.4% of Ni Yu Cu, with embodiment 1～embodiment 3
Comparing, the effect to raising life-span ratio unconfirmed, the comparative example 9 that the total amount of Ni with Cu has exceeded 1.0% is the most unconfirmed
To the effect improving life-span ratio.
In comparative example 9, although not can confirm that the reason not improving life-span ratio, but compared with Cr Ni, Cu be price relatively
High element, it is possible to the amount with less than 1.0% obtains sufficient effect.The metal structure of comparative example 8～comparative example 9 is shellfish
Family name's body shape tissue.
The chemical composition of embodiment 7 presentation technology scheme 4.This embodiment represents the result that with the addition of in the case of Mo, its with
With the addition of individually or simultaneously compared with the situation of Ni with Cu, make life-span ratio increase, hardness also raises about Hv10, and hardness is inclined
Subtractive little (Fig. 1).The metal structure of embodiment 7 is bainite shape tissue.
Mo is the element being only second to the hardenability that Mn improves steel efficiently, and makes metal structure the finest and uniform.
On the other hand, in the amount of the Mo comparative example 10 less than 0.10%, unconfirmed to hardness, the change of life-span ratio, Mo's
Amount has exceeded in the comparative example 11 of 0.30%, and hardness improves further, but on the other hand, the life-span is than reducing.Comparative example
The metal structure of 10～11 is bainite shape tissue.
The chemical composition of embodiment 8 presentation technology scheme 5.Embodiment 8 represents and with the addition of Ni and Cu simultaneously and with the addition of
Result in the case of Mo.Compared with embodiment 4～embodiment 6, the life-span is higher and hardening, also reduces the deviation of hardness.Real
The metal structure executing example 8 is bainite shape tissue.
Test example 2
In this test example, in order to investigate the impact of Al, B, V and Nb and Ti, with steel cuttings, Fe Si, Fe Mn, Fe
Cr, Fe Mo, Fe B, Fe V, Fe Nb, Fe Ti, electrolysis Ni, fine copper bits (electric wire), carburant, pure Al etc. are former material
Material, is adjusted proportioning raw materials in the way of forming desired composition, uses the experiment of melting amount 100kg with ferrum conversion to use
High frequency melting furnace melts.
Fusion temperature is set to 1650 DEG C～1680 DEG C, utilizes water to send legal system forth and make ball.The ball making acquisition is right after being dried
It sieves, and takes out Φ 1mm(and remains in the ball in the sieve of 1.00mm through the sieve of 1.18mm) ball of size, evaluate
Its quality etc..Its result is shown in Table 2 below, and in FIG, the deviation of hardness is carried out graph representation.
Table 2
It addition, evaluation methodology is identical with test example 1, but owing to there are in test example 1 in non-spherical granule rate relatively
The tendency that in the case of height, porosity also increases, therefore in test example 2, eliminates porosity as assessment item.
The embodiment 9 of table 2～embodiment 10 expression with the addition of the result in the case of Al.Embodiment 9 presentation technology scheme 6
Chemical composition.The chemical composition of embodiment 10 presentation technology scheme 7.In table 2, embodiment 9～the non-spherical of embodiment 10
Grain rate is reduced to less than 2%, has confirmed the effect improving shape.The metal structure of embodiment 9～embodiment 10 is bainite
Shape tissue.On the other hand, in the amount of the Al comparative example 12 less than 0.04%, unconfirmed to improving the effect of shape,
The amount of Al has exceeded in the comparative example 13 of 0.12%, makes shape deteriorate on the contrary.Al is the deoxidant element of strength, suitable
Amount can play the effect improving ball shape, but if the amount of Al is too much, then can form oxygen on molten metal surface
Changing film, deducibility is for make shape deteriorate on the contrary.The metal structure of comparative example 12～comparative example 13 is bainite shape tissue.
Embodiment 11～embodiment 12 expression with the addition of the result in the case of B.The chemistry of embodiment 11 presentation technology scheme 8
Composition.The chemical composition of embodiment 12 presentation technology scheme 9.Add B non-spherical granule rate is had little to no effect, but meeting
Somewhat improve life-span ratio.The metal structure of embodiment 11～embodiment 12 is bainite shape tissue.On the other hand, containing at B
In the amount comparative example 14 more than 0.05%, life-span ratio is declined slightly.B is the unit making the toughness of steel improve with the amount of trace
Element, and B is the element that price is of a relatively high, it is possible to the amount with less than 0.05% obtains sufficient effect.Comparative example 14
Metal structure is bainite shape tissue.
Embodiment 13～embodiment 15 represent with the addition of select from the group being made up of V, Nb and Ti more than one
Result in the case of element.Embodiment 13 and the chemical composition of embodiment 14 presentation technology scheme 10.Embodiment 15 presentation technology
The chemical composition of scheme 11.In the above-described embodiments, make life-span when hardness slightly improve, and the deviation of hardness reduces to minimum
(Fig. 1).The metal structure of embodiment 13～embodiment 15 is bainite shape tissue.On the other hand, from by V, Nb and Ti structure
The amount of more than one elements selected in the group become has exceeded in the comparative example 15 of 0.5%, makes life-span ratio reduce.At this
In bright embodiment, the metal structure of embodiment 13～embodiment 15 be the finest uniformly, confirmed V, Nb and Ti
Miniaturization to metal structure is maximally efficient, but if the amount of V, Nb and Ti is too much, then can form carbonization on crystal boundary
Thing, thus be inferred as making toughness reduce and make life-span ratio reduce.The metal structure of comparative example 15 is bainite shape tissue.
Claims (11)
1. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, below P:0.05%, below S:0.05%, remainder only by Fe and
Inevitably impurity is constituted, and described Low carbon cast steel pellet is the metal structure based on bainite, and the shape of ball is uniform, dimension
Family name's hardness is 400～520.
2. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.13%～0.22%, Si:0.15%～
0.25%, Mn:0.5%～0.90%, Cr:0.4%～0.8%, below P:0.03%, below S:0.03%, remainder is only
Being made up of Fe and inevitable impurity, described Low carbon cast steel pellet is the metal structure based on bainite, and the shape of ball
Shape is uniform, and Vickers hardness is 400～520.
3. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, the total of more than one elements selected from the group being made up of Ni and Cu
Be 0.4%～1.0%, below P:0.05%, below S:0.05%, remainder is only by Fe and inevitable impurity structure
Becoming, described Low carbon cast steel pellet is the metal structure based on bainite, and the shape of ball is uniform, Vickers hardness be 400～
520。
4. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, Mo:0.10%～0.30%, below P:0.05%, below S:0.05%,
Remainder is only made up of Fe and inevitable impurity, and described Low carbon cast steel pellet is the metal group based on bainite
Knitting, and the shape of ball is uniform, Vickers hardness is 400～520.
5. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, the total of more than one elements selected from the group being made up of Ni and Cu
Be 0.4%～1.0%, Mo:0.10%～0.30%, below P:0.05%, below S:0.05%, remainder only by Fe and
Inevitably impurity is constituted, and described Low carbon cast steel pellet is the metal structure based on bainite, and the shape of ball is uniform, dimension
Family name's hardness is 400～520.
6. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, Al:0.04%～0.12%, below P:0.05%, below S:0.05%,
Remainder is only made up of Fe and inevitable impurity, and described Low carbon cast steel pellet is the metal group based on bainite
Knitting, and the shape of ball is uniform, Vickers hardness is 400～520.
7. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, the total of more than one elements selected from the group being made up of Ni and Cu
It is 0.4%～1.0%, Mo:0.10%～0.30%, Al:0.04%～0.12%, below P:0.05%, below S:0.05%,
Remainder is only made up of Fe and inevitable impurity, and described Low carbon cast steel pellet is the metal group based on bainite
Knitting, and the shape of ball is uniform, Vickers hardness is 400～520.
8. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, B:0.001%～0.05%, below P:0.05%, below S:0.05%,
Remainder is only made up of Fe and inevitable impurity, and described Low carbon cast steel pellet is the metal group based on bainite
Knitting, and the shape of ball is uniform, Vickers hardness is 400～520.
9. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, the total of more than one elements selected from the group being made up of Ni and Cu
It is 0.4%～1.0%, Mo:0.10%～0.30%, Al:0.04%～0.12%, B:0.001%～0.05%, P:0.05%
Below, below S:0.05%, remainder only by Fe and inevitably impurity constitute, described Low carbon cast steel pellet is with bayesian
Body is the metal structure of main body, and the shape of ball is uniform, and Vickers hardness is 400～520.
10. a Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, more than one elements of selecting from the group being made up of V, Nb and Ti
Add up to 0.05%～0.5%, below P:0.05%, below S:0.05%, remainder is only by Fe and the most miscellaneous
Matter is constituted, and described Low carbon cast steel pellet is the metal structure based on bainite, and the shape of ball is uniform, and Vickers hardness is 400
～520.
11. 1 kinds of Low carbon cast steel pellet, it is characterised in that
This Low carbon cast steel pellet has following chemical composition: in terms of quality %, C:0.1%～0.25%, Si:0.1%～0.3%,
Mn:0.40%～1.0%, Cr:0.3%～1.0%, the total of more than one elements selected from the group being made up of Ni and Cu
Be 0.4%～1.0%, Mo:0.10%～0.30%, Al:0.04%～0.12%, B:0.001%～0.05%, from by V, Nb
And more than one elements selected in the group that constitutes of Ti add up to 0.05%～0.5%, below P:0.05%, S:0.05%
Hereinafter, remainder is only made up of Fe and inevitable impurity, and described Low carbon cast steel pellet is the gold based on bainite
Belonging to tissue, and the shape of ball is uniform, Vickers hardness is 400～520.
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| JP2011142531A JP5725416B2 (en) | 2011-06-28 | 2011-06-28 | Low carbon cast steel shot |
| JP2011-142531 | 2011-06-28 |
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| CN103436788B (en) * | 2013-08-27 | 2015-07-29 | 甘经习 | A kind of preparation method of Chromium molybdenum alloy low-carbon steel shot |
| CN103436807B (en) * | 2013-08-28 | 2016-07-06 | 武汉武船金属制造有限责任公司 | A kind of low-carbon-equivalent high-strength tenacity cast steel |
| CN103469083B (en) * | 2013-09-18 | 2015-06-10 | 攀枝花学院 | Heat-resistant cast steel and application thereof |
| CN105385961B (en) * | 2015-12-16 | 2018-09-28 | 淄博鲁宝金属制品有限公司 | Wear-resisting low-carbon shot and preparation method thereof and centrifugal atomization apparatus |
| CN106555116B (en) * | 2016-11-29 | 2019-04-05 | 连云港倍特超微粉有限公司 | A kind of steel casting surface Hardening Treatment antifriction alloy shot and preparation method thereof |
| CN112359281A (en) * | 2020-10-26 | 2021-02-12 | 中冶陕压重工设备有限公司 | ZG17CrNi2MoSYI steel and casting preparation method |
| CN113789477B (en) * | 2021-09-16 | 2022-08-02 | 大连交通大学 | Cast steel shot with low-carbon martensite structure and preparation process thereof |
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| JPS56152909A (en) * | 1980-04-30 | 1981-11-26 | Nippon Beenaito Kk | Manufacture of metallic particle |
| JPS579855A (en) * | 1980-06-20 | 1982-01-19 | Ito Kiko Kk | Steel shot |
| JPS6475658A (en) * | 1987-09-16 | 1989-03-22 | Kobe Steel Ltd | Production of material for shot peening |
| CN1107738C (en) * | 2000-12-14 | 2003-05-07 | 杨继玉 | Alloy reinforced cast steel ball |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4495106B2 (en) * | 2006-03-28 | 2010-06-30 | 新日本製鐵株式会社 | Steel pipe for machine structure excellent in machinability and manufacturing method thereof |
| JP5020689B2 (en) * | 2007-04-17 | 2012-09-05 | 新日本製鐵株式会社 | Machine structure steel pipe with excellent machinability |
| JP5241455B2 (en) * | 2008-12-02 | 2013-07-17 | 新日鐵住金株式会社 | Carbonitriding member and method for producing carbonitriding member |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152909A (en) * | 1980-04-30 | 1981-11-26 | Nippon Beenaito Kk | Manufacture of metallic particle |
| JPS579855A (en) * | 1980-06-20 | 1982-01-19 | Ito Kiko Kk | Steel shot |
| JPS6475658A (en) * | 1987-09-16 | 1989-03-22 | Kobe Steel Ltd | Production of material for shot peening |
| CN1107738C (en) * | 2000-12-14 | 2003-05-07 | 杨继玉 | Alloy reinforced cast steel ball |
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| CN102851593A (en) | 2013-01-02 |
| JP2013010976A (en) | 2013-01-17 |
| JP5725416B2 (en) | 2015-05-27 |
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