CN109423580A - A kind of hollow stabilizer rod of automobile steel pipe and its manufacturing method - Google Patents
A kind of hollow stabilizer rod of automobile steel pipe and its manufacturing method Download PDFInfo
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- CN109423580A CN109423580A CN201710761716.7A CN201710761716A CN109423580A CN 109423580 A CN109423580 A CN 109423580A CN 201710761716 A CN201710761716 A CN 201710761716A CN 109423580 A CN109423580 A CN 109423580A
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- steel pipe
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
A kind of hollow stabilizer rod of automobile steel pipe and its manufacturing method, the steel pipe chemical component mass percent are as follows: C:0.28-0.40%, Si:0.05-0.35%, Mn:1.05-1.60%, Mo:0.1-0.6%, B:0.001-0.006%, Al:0.015-0.060%, Cr:0.1-0.8%, Ti:0.003-0.06%, S≤0.006%, P≤0.015%, O≤0.003%, and need to meet: 0.7%≤Mo+50B+Cr≤1.3%, surplus are Fe and other inevitable impurity.Steel pipe of the present invention has good intensity and plasticity, and there is high anti-torsion fatigue behaviour under biggish stress level, it can satisfy the use of stabiliser bar under big stress condition, specific performance index is as follows: quenching state tensile strength >=1700MPa, quenching state yield strength >=1300MPa, quenching state elongation percentage >=12%, surfaces externally and internally decarburized layer deepness are 0, under conditions of 550MPa stress, torsional fatigue number is greater than 1,200,000 times.
Description
Technical field
The present invention relates to a kind of hollow stabilizer rod of automobile steel pipe and its manufacturing methods.
Background technique
Stabiliser bar used for vehicle transmission shaft is the complementary elastic element of one of automobile suspension system, the function of stabilizer bar
With being to prevent vehicle body from excessive lateral inclination occurring in turning, vehicle body is set to keep balance as far as possible, it is therefore an objective to reduce automobile transverse direction
Inclination degree and improvement ride comfort.Stabilizer bar is actually a horizontal torsion-bar spring, can functionally be regarded as
A kind of special elastic element.When vehicle body is only vertically moved, two sides Suspension Deformation is identical, and stabilizer bar does not work.
When automobile turning, body roll, suspension bounce in two sides is inconsistent, and outboard axle can press to stabiliser bar, and stabiliser bar will occur
Distortion, the elastic force of shaft can prevent wheel lift, so that vehicle body be made to keep balancing as far as possible, play the role of laterally stable.
Previous stabiliser bar is produced using solid bar, and body lightening is in recent years to reach energy-saving and emission-reduction
Requirement be increasingly enhanced.Stabiliser bar is primarily subjected to rotation torque in use, when stress, apart from its remoter receiving of the center of circle
Rotating torque it is bigger, and the torsional moment being subject in the center point is zero, thus by transmission shaft with solid bar with hollow
Steel pipe substitutes, and can mitigate the weight of vehicle body significantly, but can't be used for causing too much influence.
According to the use condition of stabiliser bar, stabiliser bar design need to generally use higher intensity, while in order to guarantee that it is anti-
The performance of torsional fatigue, to the dimensional accuracy of product, decarburization situation of inside and outside surface quality and surfaces externally and internally etc. is both needed to be controlled
System.Therefore, stabiliser bar is generally produced in such a way that small-bore welded tube adds cold working with tube product.
Chinese patent CN104395487A discloses a kind of steel pipe for hollow stabilizing rod, which designs hollow steady
Fixed pole pipe possesses preferable fatigue behaviour, but is added to more alloying element, and the manufacturing cost of product is higher, and the torsion of product
Turn the demand that fatigue behaviour is not able to satisfy more high stress hollow stabilizing rod pipe.
Summary of the invention
The purpose of the present invention is to provide a kind of hollow stabilizer rod of automobile steel pipe and its manufacturing method, the stabiliser bar steel
Quenching state tensile strength >=1700Mpa of pipe, quenching state yield strength >=1300MPa, quenching state elongation percentage >=12%, interior appearance
Face decarburized layer deepness is 0, and under conditions of 550MPa stress, torsional fatigue number is greater than 1,200,000 times.The stabiliser bar steel pipe
With good strong plasticity, and there is high anti-torsion fatigue behaviour under biggish stress level, can satisfy big stress item
The use of stabiliser bar under part.
In order to achieve the above objectives, the technical scheme is that
A kind of hollow stabilizer rod of automobile steel, chemical component mass percent are as follows: C:0.28-0.40%, Si:0.05-
0.35%, Mn:1.05-1.60%, Mo:0.1-0.6%, B:0.001-0.006%, Al:0.015-0.060%, Cr:0.1-
0.8%, Ti:0.003-0.06%, S≤0.006%, P≤0.015%, O≤0.0030%, and following relationship need to be met simultaneously:
0.7%≤Mo+50B+Cr≤1.3%, surplus are Fe and other inevitable impurity.
Preferably, C:0.28-0.35% in the hollow stabilizer rod of automobile composition of steel.
Preferably, Si:0.1-0.3% in the hollow stabilizer rod of automobile composition of steel.
Further, the microstructure of hollow stabilizer rod of automobile steel is that ferrite adds pearlitic structrure and Dispersed precipitate
Carbide tissue.
The present invention also provides the steel pipe of above-mentioned hollow stabilizer rod of automobile steel making, the hollow stabilizer rod of automobile steel pipe
Chemical component mass percent are as follows: C:0.28-0.40%, Si:0.05-0.35%, Mn:1.05-1.60%, Mo:0.1-
0.6%, B:0.001-0.006%, Al:0.015-0.060%, Cr:0.1-0.8%, Ti:0.003-0.06%, S≤
0.006%, P≤0.015%, O≤0.0030%, and above-mentioned element need to meet following relationship: 0.7%≤Mo+50B+Cr simultaneously
≤ 1.3%, surplus is Fe and other inevitable impurity.
Preferably, hollow stabilizer rod of automobile C:0.28-0.35% in steel pipe ingredient.
Preferably, hollow stabilizer rod of automobile Si:0.1-0.3% in steel pipe ingredient.
Preferably, the wall thickness of hollow stabilizer rod of automobile steel pipe is 1.5-8mm.
Preferably, the outer diameter of hollow stabilizing rod steel pipe is 15-50mm.
Further, the microstructure of hollow stabilizer rod of automobile steel pipe is that ferrite adds pearlitic structrure and disperse point
The carbide tissue of cloth, steel pipe surfaces externally and internally are bright state, and surfaces externally and internally is without decarburized structure, in the microstructure of weld seam part
Metal flow direction is clear, and the metal flow direction of weld seam is not orthogonal to surfaces externally and internally.
Quenching state tensile strength >=1700MPa of the hollow stabilizer rod of automobile steel pipe, quenching state yield strength >=
1300MPa, quenching state elongation percentage >=12%, surfaces externally and internally decarburized layer deepness are 0, under conditions of 550MPa stress, torsion
Times of fatigue is greater than 1,200,000 times.
In the ingredient design of steel of the present invention:
C:C element is the one of the chief elements for improving the intensity of steel, is mainly used for solving the intensity of hollow stabilizing rod, lead to
The formation of percarbide can effectively improve the intensity of steel, and add at low cost.Add to realize in less alloying element
Achieve the purpose that higher product intensity, the lower limit of C content are set as 0.28% on the basis of adding, when C content is more than 0.40%
When there are problems that weld seam position generate hardening flaw.Therefore, C content control is 0.28-0.40% in the present invention, preferably
0.28-0.35%.
Si:Si element is to add in steelmaking process as reducing agent and deoxidier, does not form carbonization in steel
Object, and its solid solubility in steel is larger, can strengthen the ferrite in steel to improve the intensity of steel, therefore this steel grade suitably increases
Add Si content, to improve the intensity of as-quenched steel.Therefore the lower limit of Si content is 0.05%, while Si content is more than 0.35%
When, the toughness of steel pipe reduces.Therefore, the control of Si content is 0.05%-0.35%, preferably 0.1-0.3% in the present invention.
Mn:Mn is important the formation element of alloy element and weak carbide.Mn is mainly improved by solution strengthening
The intensity of steel, while the addition of Mn content can effectively increase the harden ability of steel, be to guarantee that fished pipe has high-intensitive weight
It ensures.It therefore is 1.05% by the lower limit of Mn content, but, if Mn content is more than 1.6%, the plasticity and impact flexibility of steel
Decline therewith more significant, has an adverse effect to the anti-torsion fatigue behaviour of fished pipe, therefore, Mn content in the present invention
Control is 1.05-1.6%.
Mo:Mo plays the role of solution strengthening in steel and improves the harden ability of steel, since this steel grade needs to reach after quenching
To high tensile strength and plasticity, when Mo content reaches 0.1%, can just have significant solution strengthening and improve harden ability
Effect, therefore the lower limit set of Mo content is 0.1%.Can have an adverse effect to the plasticity of steel pipe when Mo content is excessive.Together
When, it is also contemplated that cost factor, therefore, the control of Mo content is 0.1-0.6% in the present invention.
B:B has the effect of the harden ability for the steel that increases significantly in steel, and content has more apparent greater than 0.001% B
Increase harden ability and intensity effect, while B and the compound addition of Mo can dramatically increase the harden ability of steel, but B content is once
The toughness of steel pipe can be had an impact more than 0.006%, and consider to add the factor of cost, B, which is controlled, in the present invention is
0.001-0.006%.
Al:Al has deoxidation and its plasticity for helping to improve steel, toughness and processability in steel.When Al content reaches
When to 0.015% or more, the effect for improving the plasticity of steel, toughness and processability is more significant, but when Al content is more than
When 0.06%, sulphide inculsion increases in steel, generates large effect to the anti-torsion fatigue behaviour of steel pipe.Therefore, of the invention
Al content is controlled in 0.015-0.06%.
Cr:Cr is the formation element of middle strong carbide.Part Cr is replaced as iron and forms alloyed cementite in steel, to improve it
Stability, another part Cr, which is then dissolved in ferrite, plays solution strengthening effect, improves ferritic intensity and hardness.It is same with this
When, Cr is also the essential element for improving the harden ability of steel.When Cr content is more than 0.8%, the plasticity of steel pipe matrix and weld seam position,
Toughness will receive large effect, so selecting the upper limit of Cr content is 0.8%.Therefore, the control of Cr content is in the present invention
0.1-0.8%.
Ti:Ti is strong nitride forming element, forms TiN compound with the N in steel, to inhibit in steel because of addition B member
The precipitation of element and the brittleness BN of generation, improves the toughness and plasticity of steel, it is contemplated that alloy adds cost, Ti content control in the present invention
It is made as 0.003-0.06%.
Inevitable impurity is mainly the increase meeting pair of S and P element, especially S content in technical solution of the present invention
Sulfide content has big influence in steel, and therefore, control S as far as possible is 0.006% hereinafter, control P is below 0.015%.Meanwhile
In steel O content in steel it is oxide-based be mingled be affected, therefore control O content below 0.0030%.
Without containing costs such as Ca, Mg or rare earth metals in hollow stabilizer rod of automobile steel and steel pipe ingredient of the present invention
Higher addition element passes through restriction with C, Mn for main intensified element by the optimization design to chemical component
0.7%≤Mo+50B+Cr≤1.3% adds to control the combination of tri- kinds of elements of Mo, B, Cr, thus guarantee the harden ability of product,
So that high-intensitive requirement can be reached after heat treatment process of the finished product using the quenching add-back fire in process, while can be with
Alloying element is avoided to be also easy to produce Cold Bending Crack when adding the excessively high reduction for causing steel plasticity and the subsequent cold bending of steel pipe.Meanwhile
The strong plasticity that steel is usually improved by adding Ti member, guarantees the cold bending performance of product and the anti-torsion fatigue behaviour of finished product.
Further, by the control to elements such as P, S, O in steel, the toughness of steel is improved, guarantees the final anti-torsion fatigue of product
Performance.
The present invention also provides a kind of manufacturing methods of hollow stabilizer rod of automobile steel pipe comprising following steps:
(1) it smelted, cast according to the proportion of above-mentioned chemical component, and be rolled into coiled sheet, wherein the volume of control coiled sheet
Taking temperature is 780-900 DEG C；
(2) uncoiling is carried out to coiled sheet and slitting is sheared；
(3) coiled sheet after slitting is formed, welded, surfaces externally and internally burr is removed after welding, and heat is carried out to weld seam
Processing, heat treatment temperature are 550-800 DEG C；
(4) pickling, phosphatization, saponification；
(5) it is cold working to finished size: carrying out the cold working of multiple passages by the way of cold-drawn or cold rolling, and in two-phase
Intermediate heat-treatment is carried out between neighbour's cold working passage, intermediate heat-treatment temperature is 500-700 DEG C, keeps the temperature 30-60min；
(6) finished product is heat-treated in the controllable reducing atmosphere furnace of atmosphere, heat treatment temperature is 700-930 DEG C.
Further, in step (1), control coiled sheet yield strength be 280-380MPa, tensile strength 550-700MPa,
Guarantee the forming property of coiled sheet, while guaranteeing the final strength of product.
In step (3), the heat treatment of weld seam is handled using online induction heating, and heat treatment temperature is 550-800 DEG C, to disappear
Except the internal stress of seam organization after coiled sheet forming welding, guarantee that the hardness, intensity and base material of weld dimensions are consistent,
It is not cracked in commissure in subsequent Process of Cold-roll Forming.
In step (5), the lengthening coefficient being cold worked per pass is 1.3-1.8, guarantees that product has best cold formability
Meanwhile deflection per pass maximizes, and improves manufacture efficiency, reduces cost, and the steel pipe after cold working is also avoided to generate cracking
The defects of.Processing is eliminated using the intermediate heat-treatment technique of 500-700 DEG C of heat preservation 30-60min between cold working per pass to answer
Power softens steel pipe, guarantees there is optimal cold forming capability during steel pipe cold working.
In step (6), the heat treatment temperature of finished product is 700-930 DEG C, is contained in heat-treating atmosphere in reducing atmosphere furnace
Reducibility gas H2Or CO, reducibility gas H2Or the volumn concentration of CO is 15-40%, guarantees that steel tube surface is bright shape
State, while preventing from generating surfaces externally and internally decarburization in heating process.
The present invention guarantees fished pipe by the compound addition of alloying element C, Mn, Mo, Cr, B of relative low price
Intensity and plasticity, while control weld seam heat treatment 550-800 DEG C of temperature, the intermediate heat-treatment temperature during being cold worked
500-700 DEG C, nothing in 700-930 DEG C of final finished heat treatment temperature and tissue of restitutive protection's atmosphere to guarantee fished pipe
Decarburized structure, and steel pipe surfaces externally and internally is bright state.The present invention by after control welding forming to the heat treating regime of weld seam
And the lengthening coefficient being cold worked per pass, it not only ensure that the production efficiency of manufacture steel pipe, also efficiently avoid steel pipe
Cracking.
The microstructure of stabiliser bar of the present invention steel pipe is the carbonization that ferrite adds pearlitic structrure and Dispersed precipitate
Object tissue guarantees the strong plasticity of product, provides basic guarantee for the high anti-torsion fatigue behaviour of product；Steel pipe surfaces externally and internally is
Bright state, surfaces externally and internally ensure that link of the surface without weak easy fracture during torsional fatigue, welding seam part without decarburized structure
Metal flow direction is clear in the microstructure divided, and the metal flow direction of weld seam is not orthogonal to surfaces externally and internally, this ensures that weld seam part
Do not become fracture origin during torsional fatigue, so that product integrally has high anti-torsion fatigue behaviour.
Beneficial effects of the present invention:
1) hollow stabilizer rod of automobile steel pipe of the present invention mainly passes through Mn, Ti and a small amount of Cr, Mo, B element are compound
It adds to improve the harden ability of steel, achievees the purpose that high-strength plasticity and highly resistance torsional fatigue performance, and add without precious metal element
Add, cost is relatively low for products material.
2) hollow stabilizer rod of automobile of the present invention need to strengthen element with steel pipe based on C, Mn, and control 0.7%≤Mo+
50B+Cr≤1.3% improves the harden ability of steel pipe, guarantees that steel pipe has high intensity after using working process, also added
The Ti of 0.003-0.06% is to improve the plasticity of steel, and by the optimal control of manufacturing process, so that steel pipe has in quenching state
High-intensitive and high-ductility, and then highly resistance torsional fatigue performance is obtained, and use under restitutive protection's atmosphere to steel during fabrication
Pipe finished product carries out 700-930 DEG C of heat treatment, so that steel pipe surfaces externally and internally is bright state without decarburized structure in steel pipe tissue, makes
Product integrally has a high anti-torsion fatigue behaviour, the steel pipe can be used for producing used under the conditions of high stress level it is hollow
Stabiliser bar, and the weight of hollow stabilizing rod can be substantially reduced.
3) the hollow stabilizer rod of automobile steel pipe prepared by the present invention has higher intensity and plasticity and good anti-
Torsional fatigue performance, specific performance index are as follows: quenching state tensile strength >=1700MPa, and quenching state yield strength >=
1300MPa, quenching state elongation percentage >=12%, surfaces externally and internally decarburized layer deepness are 0, under conditions of 550MPa stress, torsion
Times of fatigue is greater than 1,200,000 times.
Detailed description of the invention
Fig. 1 is the microstructure photo of 4 weld seam of the embodiment of the present invention.
Fig. 2 is the microstructure photo of 4 steel pipe of the embodiment of the present invention.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention will be further described.
Table 1 be 1~5 steel pipe of the embodiment of the present invention 1~10 and comparative example chemical component, table 2 be the embodiment of the present invention 1~
10 and 1~5 steel pipe of comparative example preparation technology parameter, table 3 be 1~5 steel pipe of the embodiment of the present invention 1~10 and comparative example property
Energy.
Embodiment 1-10 and comparative example 1-5
Hollow stabilizer rod of automobile steel pipe 1-10 and comparative example 1-5 of the present invention is manufactured according to the following steps,
It comprises the following steps that
(1) coiled sheet is smelted, cast and is rolled according to chemical elements in percentage by mass shown in table 1, coiled sheet batches
Temperature is 780-900 DEG C；
(2) uncoiling is carried out to coiled sheet and slitting is sheared；
(3) it is welded to obtain main pipe by the way of high-frequency resistance welding (HFRW), removes inside and outside burr, at the online induction heat of postwelding
The temperature of reason is 550-800 DEG C；
(4) pickling, phosphatization, saponification are carried out to the main pipe being welded；
(5) it carries out being cold working to finished size by the way of cold-drawn or cold rolling, the lengthening coefficient being cold worked per pass is
1.3-1.8 eliminates processing using the intermediate heat-treatment technique of 500-700 DEG C of heat preservation 30-60min between cold working per pass and answers
Power, the steel pipe finished size after cold working are wall thickness 1.5-8mm, outer diameter 15-50mm；
(6) it uses and contains H2Or the heat-treatment furnace of CO reducing atmosphere is heat-treated, 700-930 DEG C of heat treatment temperature,
Soaking time 40-70min.
The performance that steel pipe is pulled out in weldering in above-described embodiment and comparative example is compared, specifically judges whether to meet hollow steady
The standard of fixed pole steel pipe is as follows: 1) quenching state tensile strength >=1700MPa, and 2) yield strength >=1300MPa, 3) elongation percentage >=
12%, 4) surface texture decarburized layer deepness is 0,5) torsional fatigue test is carried out under conditions of loading stress 550MPa, it reverses tired
Labor number is greater than 1,200,000 times, is denoted as qualification, otherwise is denoted as unqualified.I.e. when above-mentioned seamless steel pipe simultaneously meet 1)~5) mark
Punctual is qualified；Conversely, then to be unqualified, the comprehensive mechanical property ginseng of steel pipe in 1-10 of the embodiment of the present invention and comparative example 1-5
Number is as shown in table 3.
As shown in Figure 1, metal flow direction is clear in the microstructure of steel pipe seam part of the present invention, and the metal of weld seam
Flow direction is not orthogonal to surfaces externally and internally, and the angle of weld seam streamline and inner surface is 55 °, ensure that the strong plasticity of seam organization and antitorque
Turn fatigue behaviour.
As shown in Figure 2, the microstructure of the steel pipe obtained by the present invention are as follows: banded ferritic-pearlitic tissue matrix
Upper Dispersed precipitate has tiny carbide particle, ensure that the strong plasticity of matrix, to guarantee that steel pipe has good anti-torsion
Fatigue behaviour.
As shown in Table 3, the quenching state tensile strength of the automobile hollow bar stabiliser bar steel pipe of embodiment 1-10 >=
1700MPa, quenching state yield strength >=1300MPa, quenching state elongation percentage >=12%, surfaces externally and internally tissue decarburized layer deepness are 0,
Torsional fatigue test is carried out under conditions of stress is 550MPa, torsional fatigue number is greater than 1,200,000 times.However, due to comparison
At least one in the comprehensive mechanical property of each steel pipe in example 1-5 is not inconsistent standardization.
Claims (17)
1. a kind of hollow stabilizer rod of automobile steel, chemical component mass percent are as follows: C:0.28-0.40%, Si:0.05-
0.35%, Mn:1.05-1.60%, Mo:0.1-0.6%, B:0.001-0.006%, Al:0.015-0.060%, Cr:0.1-
0.8%, Ti:0.003-0.06%, S≤0.006%, P≤0.015%, O≤0.003%, and following relationship need to be met simultaneously:
0.7%≤Mo+50B+Cr≤1.3%, surplus are Fe and other inevitable impurity.
2. hollow stabilizer rod of automobile steel according to claim 1, which is characterized in that the hollow stabilizer rod of automobile steel
C:0.28-0.35% in ingredient.
3. hollow stabilizer rod of automobile steel according to claim 1, which is characterized in that the hollow stabilizer rod of automobile steel
Si:0.1-0.3% in ingredient.
4. hollow stabilizer rod of automobile steel according to claim 1-3, which is characterized in that the automobile hollow is steady
The microstructure of fixed pole steel is the carbide tissue that ferrite adds pearlitic structrure and Dispersed precipitate.
5. a kind of hollow stabilizer rod of automobile steel pipe, chemical component mass percent are as follows: C:0.28-0.40%, Si:0.05-
0.35%, Mn:1.05-1.60%, Mo:0.1-0.6%, B:0.001-0.006%, Al:0.015-0.060%, Cr:0.1-
0.8%, Ti:0.003-0.06%, S≤0.006%, P≤0.015%, O≤0.0030%, and following relationship need to be met simultaneously:
0.7%≤Mo+50B+Cr≤1.3%, surplus are Fe and other inevitable impurity.
6. hollow stabilizer rod of automobile steel pipe according to claim 5, which is characterized in that the hollow stabilizer rod of automobile is used
C:0.28-0.35% in steel pipe ingredient.
7. hollow stabilizer rod of automobile steel pipe according to claim 5, which is characterized in that the hollow stabilizer rod of automobile is used
Si:0.1-0.3% in steel pipe ingredient.
8. according to the described in any item hollow stabilizer rod of automobile steel pipes of claim 5-7, which is characterized in that the automobile hollow
The wall thickness of stabiliser bar steel pipe is 1.5-8mm.
9. according to the described in any item hollow stabilizer rod of automobile steel pipes of claim 5-7, which is characterized in that the automobile hollow
The outer diameter of stabiliser bar steel pipe is 15-50mm.
10. according to the described in any item hollow stabilizer rod of automobile steel pipes of claim 5-9, which is characterized in that the automobile is empty
The microstructure of heart stabiliser bar steel pipe is the carbide tissue that ferrite adds pearlitic structrure and Dispersed precipitate, weld seam part
Metal flow direction is clear in microstructure, and the metal flow direction of weld seam is not orthogonal to surfaces externally and internally.
11. according to the described in any item hollow stabilizer rod of automobile steel pipes of claim 5-10, which is characterized in that the automobile is empty
Quenching state tensile strength >=1700MPa of heart stabiliser bar steel pipe, quenching state yield strength >=1300MPa, quenching state elongation percentage
>=12%, surfaces externally and internally decarburized layer deepness is 0, and under conditions of 550MPa stress, torsional fatigue number is greater than 1,200,000 times.
12. such as the manufacturing method of the described in any item hollow stabilizer rod of automobile steel pipes of claim 5-11 comprising following step
It is rapid:
1) it smelted, cast according to the proportion of any one of the claim 5-7 chemical component, and be rolled into coiled sheet, wherein
The coiling temperature for controlling coiled sheet is 780-900 DEG C；
2) uncoiling is carried out to coiled sheet and slitting is sheared；
3) coiled sheet after slitting is formed, welded, surfaces externally and internally burr is removed after welding, and be heat-treated to weld seam,
Heat treatment temperature is 550-800 DEG C；
4) pickling, phosphatization, saponification；
5) it is cold working to finished size: carrying out the cold working of multiple passages by the way of cold-drawn or cold rolling, and adjacent cold two
Intermediate heat-treatment is carried out between processing passage, intermediate heat-treatment temperature is 500-700 DEG C, keeps the temperature 30-60min；
6) finished product is heat-treated in reducing atmosphere furnace, heat treatment temperature is 700-930 DEG C.
13. the manufacturing method of hollow stabilizer rod of automobile steel pipe according to claim 12, which is characterized in that step 1)
In, the yield strength of the coiled sheet is 280-380MPa, tensile strength 550-700MPa.
14. the manufacturing method of hollow stabilizer rod of automobile steel pipe according to claim 12, which is characterized in that step 5)
In, the lengthening coefficient being cold worked per pass is 1.3-1.8.
15. the manufacturing method of hollow stabilizer rod of automobile steel pipe according to claim 12, which is characterized in that step 6)
In, reducibility gas H is contained in reducing atmosphere furnace2Or CO, reducibility gas H2Or the volumn concentration of CO is 15-40%.
16. the manufacturing method of the described in any item hollow stabilizer rod of automobile steel pipes of 2-15, feature exist according to claim 1
In the microstructure of hollow stabilizer rod of automobile steel pipe is the carbide group that ferrite adds pearlitic structrure and Dispersed precipitate
It knits, metal flow direction is clear in the microstructure of weld seam part, and the metal flow direction of weld seam is not orthogonal to surfaces externally and internally.
17. the manufacturing method of the described in any item hollow stabilizer rod of automobile steel pipes of 2-16, feature exist according to claim 1
In, quenching state tensile strength >=1700MPa of the hollow stabilizer rod of automobile steel pipe, quenching state yield strength >=1300MPa,
Quenching state elongation percentage >=12%, surfaces externally and internally decarburized layer deepness are 0, under conditions of 550MPa stress, torsional fatigue number
Greater than 1,200,000 times.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110038913A (en) * | 2019-04-26 | 2019-07-23 | 张家港保税区亚鑫精密制管有限公司 | Hollow stabilizer rod of automobile metal pipe processing technique |
| CN111394558A (en) * | 2020-03-12 | 2020-07-10 | 唐山不锈钢有限责任公司 | Steel belt for automobile hollow stabilizer bar and production method thereof |
| CN112281078A (en) * | 2020-11-23 | 2021-01-29 | 湖州南浔中盛金属热处理有限公司 | Be applied to cementation steel pipe in automotive filed |
| CN112322974A (en) * | 2020-10-26 | 2021-02-05 | 首钢集团有限公司 | High-fatigue-life strip steel and preparation method and application thereof |
| CN112981255A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Pickling and EPS steel plate for automobile hollow stabilizer bar steel pipe and manufacturing method thereof |
| CN113265581A (en) * | 2020-02-17 | 2021-08-17 | 宝山钢铁股份有限公司 | Steel pipe for stabilizer bar and manufacturing method thereof |
| CN113444864A (en) * | 2020-03-24 | 2021-09-28 | 宝山钢铁股份有限公司 | Control process for surface decarburization of automobile hollow transmission shaft tube and hollow transmission shaft tube thereof |
| CN113862569A (en) * | 2021-09-18 | 2021-12-31 | 马鞍山钢铁股份有限公司 | Steel with low friction coefficient and excellent fatigue property for automobile hollow stabilizer bar and production method thereof |
| CN115058663A (en) * | 2022-06-10 | 2022-09-16 | 唐山不锈钢有限责任公司 | Steel pipe for high-light-weight automobile hollow stabilizer bar and production method thereof |
| CN115122053A (en) * | 2022-07-22 | 2022-09-30 | 隆昌山川机械有限责任公司 | Processing technology for pickling-free phosphating of metal pipe of working cylinder of automobile shock absorber |
| WO2023241700A1 (en) * | 2022-06-17 | 2023-12-21 | 宝山钢铁股份有限公司 | High-strength and high-toughness easy-cutting seamless steel tube for motor shaft and manufacturing method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038913A (en) * | 2019-04-26 | 2019-07-23 | 张家港保税区亚鑫精密制管有限公司 | Hollow stabilizer rod of automobile metal pipe processing technique |
| CN113265581B (en) * | 2020-02-17 | 2022-10-21 | 宝山钢铁股份有限公司 | Steel pipe for stabilizer bar and manufacturing method thereof |
| CN113265581A (en) * | 2020-02-17 | 2021-08-17 | 宝山钢铁股份有限公司 | Steel pipe for stabilizer bar and manufacturing method thereof |
| CN111394558A (en) * | 2020-03-12 | 2020-07-10 | 唐山不锈钢有限责任公司 | Steel belt for automobile hollow stabilizer bar and production method thereof |
| CN111394558B (en) * | 2020-03-12 | 2021-12-03 | 唐山不锈钢有限责任公司 | Steel belt for automobile hollow stabilizer bar and production method thereof |
| CN113444864A (en) * | 2020-03-24 | 2021-09-28 | 宝山钢铁股份有限公司 | Control process for surface decarburization of automobile hollow transmission shaft tube and hollow transmission shaft tube thereof |
| CN112322974A (en) * | 2020-10-26 | 2021-02-05 | 首钢集团有限公司 | High-fatigue-life strip steel and preparation method and application thereof |
| CN112281078A (en) * | 2020-11-23 | 2021-01-29 | 湖州南浔中盛金属热处理有限公司 | Be applied to cementation steel pipe in automotive filed |
| CN112981255A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Pickling and EPS steel plate for automobile hollow stabilizer bar steel pipe and manufacturing method thereof |
| CN113862569A (en) * | 2021-09-18 | 2021-12-31 | 马鞍山钢铁股份有限公司 | Steel with low friction coefficient and excellent fatigue property for automobile hollow stabilizer bar and production method thereof |
| CN115058663A (en) * | 2022-06-10 | 2022-09-16 | 唐山不锈钢有限责任公司 | Steel pipe for high-light-weight automobile hollow stabilizer bar and production method thereof |
| WO2023241700A1 (en) * | 2022-06-17 | 2023-12-21 | 宝山钢铁股份有限公司 | High-strength and high-toughness easy-cutting seamless steel tube for motor shaft and manufacturing method therefor |
| CN115122053A (en) * | 2022-07-22 | 2022-09-30 | 隆昌山川机械有限责任公司 | Processing technology for pickling-free phosphating of metal pipe of working cylinder of automobile shock absorber |
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