CN105063514A - Iron chain pin for vehicles and processing method thereof - Google Patents
Iron chain pin for vehicles and processing method thereof Download PDFInfo
- Publication number
- CN105063514A CN105063514A CN201510563718.6A CN201510563718A CN105063514A CN 105063514 A CN105063514 A CN 105063514A CN 201510563718 A CN201510563718 A CN 201510563718A CN 105063514 A CN105063514 A CN 105063514A
- Authority
- CN
- China
- Prior art keywords
- automobile
- iron chains
- used iron
- chains pin
- black
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Body Structure For Vehicles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention relates to an iron chain pin for vehicles and a processing method thereof, belonging to the technical field of processing of iron chain pins for vehicles. The iron chain pin for vehicles is prepared from high-strength alloy steel. The alloy steel is composed of the following chemical components in percentage by mass: 0.12%-0.20% of C, 1.40%-1.70% of Mn, 0.30%-0.80% of Mo, 2.50%-2.80% of Cr, 0.02%-0.08% of Ti, 0.0005%-0.0035% of B, 0.02%-0.20% of Al, 0.02-0.20% of Ni, at most 0.30% of Si, at most 0.035% of S, at most 0.035% of P and the balance of Fe. The processing method comprises the following steps: carrying out spheroidal annealing, phosphating and the like on alloy steel with reasonable proportioning, processing to obtain an iron chain pin semifinished product for vehicles, and carrying out specific carburizing heat treatment and black Dacromet treatment to obtain the iron chain pin for vehicles. The strength (especially tensile strength) and hardness of the iron chain pin for vehicles can satisfy the requirements for the high-strength alloy steel, for example, the hardness is up to 26 HRC, and the surface hardness is up to 31 HRC; and the corrosion resistance of the iron chain pin for vehicles is greatly enhanced.
Description
Technical field
The present invention relates to a kind of automobile-used iron chains pin and working method thereof, belong to iron chains pin processing technique field.
Background technology
Pin shaft connection structure is a kind of force transferring structure the most frequently used in engineering, such as, for meeting the needs of split transport, arm and the turntable of large-tonnage crawler crane, all adopts pinned connection between pole and turntable, iron chains pin such as automobile-used again.For automobile-used iron chains pin, the larger and impact of stressed also comparatively large especially drawing force of the scantlings of the structure of its iron chains pin, and outside iron chains pin is exposed to, very easily scraped by external force, touch, therefore, required intensity, erosion resistance are all relatively good.And iron chains pin of the prior art is substantially all make with ordinary steel, all need to improve in intensity, wear resistance, precision.
Black dacromet paint of the prior art is generally containing aluminium powder, Dacromet/steel appearance color containing aluminium powder is bright in vain, when adding black pigment, increase the difficulty of black mask, be that black must add more pigment for making coating, thus increase homodisperse difficulty, and larger affect coating performance.Not containing aluminium powder in black dacromet paint of the present invention, only add zinc flake, reduce whiteness and the brightness of coating, reduce the difficulty of black mask, improve blackness.
Further preferably, the black pigment described in black Dacroment masking liquid is one or more in graphite, gac, carbon black.
Further preferably, the dispersion agent described in black Dacroment masking liquid is one or more in Dodecyl Polyoxyethylene Ether, tetradecyl alcohol Soxylat A 25-7, hexadecanol Soxylat A 25-7.
Further preferably, the organic solvent described in black Dacroment masking liquid is one or more in benzene,toluene,xylene.
Further preferably, the alcoholic solvent described in black Dacroment masking liquid is one or more in propyl alcohol, Virahol, propyl carbinol.
In sum, the present invention reduces carbon (C) and silicon (Si) content on the basis of common high strength alloy steel 42CrMo, and improve manganese (Mn) and nickel (Ni) content, add the chromium of high level simultaneously, with the addition of boron (B), titanium (Ti), aluminium (Al) is used for crystal grain thinning, through constantly testing discovery, boron (B), titanium (Ti), the synergy produced when aluminium (Al) three kinds of elements add together, and optimize the content of other chemical compositions further, due to the change of chemical composition, its microstructure also changes.And the steel alloy adopting the rational automobile-used iron chains pin of above-mentioned compatibility used is first through the process such as Spheroidizing Annealing, phosphatization, reprocess shaping automobile-used iron chains pin work in-process, then automobile-used iron chains pin of the present invention is obtained through specific carburizing thermal treatment and the process of black Dacroment, make automobile-used iron chains pin of the present invention not only can reach the due requirement of high strength alloy steel in intensity (especially tensile strength) and hardness, as hardness reaches 26HRC, surface hardness reaches 31HRC, also drastically increases the solidity to corrosion improving automobile-used iron chains pin.
Summary of the invention
The present invention is directed to the defect existing for prior art, provide a kind of intensity, hardness higher, the good automobile-used iron chains pin of wear resistance, precision.
Above-mentioned purpose of the present invention can be implemented by the following technical programs: a kind of automobile-used iron chains pin, described iron chains pin is made up of the steel alloy of high strength, described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.12%-0.20%; Mn:1.40%-1.70%; Mo:0.30%-0.80%; Cr:2.50-2.80%; Ti:0.02%-0.08%; B:0.0005%-0.0035%; Al:0.02%-0.20%; Ni:0.02-0.20%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
The chemical composition of existing common iron chains pin steel alloy 42CrMo is C:0.38-0.45%; Mn:0.50-0.80%; Cr:0.80-1.20%; Mo:0.15-0.25%; Si:0.17-0.37%; S≤0.0035%; P≤0.0035%; Ni≤0.030%; Cu≤0.030%; All the other are Fe.First, the present invention reduces carbon (C) on the basis of common high strength alloy steel 42CrMo, and improve manganese (Mn) and nickel (Ni) content, add the chromium of high level simultaneously, with the addition of boron (B), titanium (Ti), aluminium (Al) to make up the loss of intensity because carbon drop causes and hardening capacity, the hardening capacity of further raising automobile-used iron chains pin steel alloy, and then the hardness and the intensity that improve automobile-used iron chains pin steel alloy.Secondly, although silicon (Si) has slight strengthening effect, also the toughness of steel can slightly be improved, when working with the molybdenum one in steel alloy, better effects if, but excessive silicon can have a strong impact on the welding property of steel, therefore, the present invention's automobile-used iron chains pin steel alloy suitably reduces the content of silicon, is controlled within 0.10% by the content of silicon.Moreover, the present invention's automobile-used iron chains pin steel alloy also additionally with the addition of boron (B), titanium (Ti), aluminium (Al) on the basis of 42CrMo, in order to crystal grain thinning, through constantly testing discovery, the synergy produced when boron (B), titanium (Ti), aluminium (Al) three kinds of elements add together, can increase substantially the tensile strength of automobile-used iron chains pin steel alloy, impelling strength, intensity and wear resistance further.Finally, the present invention's automobile-used iron chains pin steel alloy is by reducing S content and then reducing the non-metallic inclusion in iron chains pin steel alloy, improve the toughness plasticity of steel, improve automobile-used iron chains pin steel alloy corrosion resistance nature and intensity, by reduction P content and then the resistance to deformation reducing automobile-used iron chains pin steel alloy, reduce P, S simultaneously and alleviate embrittlement of grain boundaries in the segregation of crystal boundary.Due to the change of chemical composition, its microstructure also changes, automobile-used iron chains pin of the present invention not only in intensity and hardness (especially tensile strength) the due requirement of high-strength pin steel can be reached, also significantly improve the solidity to corrosion of automobile-used iron chains pin.
In above-mentioned bearing pin, as preferably, described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.14%-0.18%; Mn:1.50%-1.60%; Mo:0.35%-0.60%; Cr:2.55-2.70%; Ti:0.03%-0.06%; B:0.001%-0.003%; Al:0.06%-0.15%; Ni:0.05-0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy forms C:0.15% by the chemical composition of following mass percent; Mn:1.55%; Mo:0.45%; Cr:2.60%; Ti:0.05%; B:0.002%; Al:0.10%; Ni:0.08%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.16%; Mn:1.58%; Mo:0.55%; Cr:2.65%; Ti:0.04%; B:0.0025%; Al:0.08%; Ni:0.10%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.18%; Mn:1.50%; Mo:0.60%; Cr:2.55%; Ti:0.06%; B:0.001%; Al:0.15%; Ni:0.05%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.14%; Mn:1.60%; Mo:0.35%; Cr:2.70%; Ti:0.03%; B:0.003%; Al:0.06%; Ni:0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Another object of the present invention is the working method providing a kind of above-mentioned automobile-used iron chains pin, and described working method comprises the steps:
S1, pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition described above is first carried out acid pickling and rust removing, air-dry, then carry out Spheroidizing Annealing process by the raw material after air-dry, carry out bonderizing and wire drawing after samming process 5h-8h at 760-780 DEG C;
S2, shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
S3, thermal treatment: by automobile-used iron chains pin work in-process at 500-520 DEG C of insulation 40-80min, be warming up to 850-880 DEG C of insulation 40-80min, and fast cooling, to 530-560 DEG C of insulation 70-100min, is heated to 870-910 DEG C of insulation 40-80min, is then cooled to room temperature;
S4, surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 115-130 DEG C of baking 8-15min, then at 340-360 DEG C, solidify 25-35min, obtain automobile-used iron chains pin finished product.
Steel alloy used for automobile-used iron chains pin is first carried out pre-treatment by the working method of the present invention's automobile-used iron chains pin, comprise Spheroidizing Annealing process, bonderizing etc., then machine-shaping obtains automobile-used iron chains pin, the hardness of automobile-used iron chains pin is improved further by carburizing thermal treatment, case depth is made to reach 0.2-0.4mm, black water organic coating is formed on bearing pin surface finally by the process of self start type black Dacroment, its rete is made to have extremely strong sticking power, oilness, delustring, thermotolerance, solidity to corrosion, and then significantly improve the surface hardness of automobile-used iron chains pin, intensity, solidity to corrosion.
In order to ensure the performance that coating is perfect, black primary coat increasing clear top coat layer, forming complete black Dacromet/steel system.Sealer coat adopts silicate water-borne coatings, and equipment is identical with Dacroment equipment, and solidification value is identical, and set time is 4-8min.This coating is coated in black Dacromet/steel surface as surface layer, can improve corrosion resistance and the surface hardness of black Dacroment.Namely step S4 surface treatment also comprises sealing treatment after the solidification of black Dacroment process, and sealing treatment carries out in silicate water-borne coatings, and the solidification value of sealing treatment is 350-360 DEG C, and set time is 4-8min.
As preferably, in the working method of above-mentioned automobile-used iron chains pin, the black Dacroment masking liquid described in step S4 surface treatment comprises following component (counting by weight): 50 parts of epoxy resin; 20-40 part black pigment; 50-60 part zinc powder; 0.1-0.5 part dispersion agent; 0.5-3 part alcoholic solvent; 2-10 part chromic acid solution; 40-100 part organic solvent.
Embodiment
Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiments.
A kind of automobile-used iron chains pin, described iron chains pin is made up of the steel alloy of high strength, and described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.12%-0.20%; Mn:1.40%-1.70%; Mo:0.30%-0.80%; Cr:2.50-2.80%; Ti:0.02%-0.08%; B:0.0005%-0.0035%; Al:0.02%-0.20%; Ni:0.02-0.20%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
As preferably, described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.14%-0.18%; Mn:1.50%-1.60%; Mo:0.35%-0.60%; Cr:2.55-2.70%; Ti:0.03%-0.06%; B:0.001%-0.003%; Al:0.06%-0.15%; Ni:0.05-0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.15%; Mn:1.55%; Mo:0.45%; Cr:2.60%; Ti:0.05%; B:0.002%; Al:0.10%; Ni:0.08%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.16%; Mn:1.58%; Mo:0.55%; Cr:2.65%; Ti:0.04%; B:0.0025%; Al:0.08%; Ni:0.10%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.18%; Mn:1.50%; Mo:0.60%; Cr:2.55%; Ti:0.06%; B:0.001%; Al:0.15%; Ni:0.05%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Further preferably, described steel alloy is made up of the chemical composition of following mass percent: C:0.14%; Mn:1.60%; Mo:0.35%; Cr:2.70%; Ti:0.03%; B:0.003%; Al:0.06%; Ni:0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
The present invention also provides the working method of above-mentioned automobile-used iron chains pin, and described working method comprises the steps:
S1, pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition described above is first carried out acid pickling and rust removing, air-dry, then carry out Spheroidizing Annealing process by the raw material after air-dry, carry out bonderizing and wire drawing after samming process 5h-8h at 760-780 DEG C;
S2, shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
S3, thermal treatment: by automobile-used iron chains pin work in-process at 500-520 DEG C of insulation 40-80min, be warming up to 850-880 DEG C of insulation 40-80min, and fast cooling, to 530-560 DEG C of insulation 70-100min, is heated to 870-910 DEG C of insulation 40-80min, is then cooled to room temperature;
S4, surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 115-130 DEG C of baking 8-15min, then at 340-360 DEG C, solidify 25-35min, obtain automobile-used iron chains pin finished product.
As preferably, step S4 surface treatment also comprises sealing treatment after the solidification of black Dacroment process, and sealing treatment carries out in silicate water-borne coatings, and the temperature of sealing treatment is 350-360 DEG C, and the time is 4-8min.
As preferably, the black Dacroment masking liquid described in step S4 surface treatment comprises following component (counting by weight): 50 parts of epoxy resin; 20-40 part black pigment; 50-60 part zinc powder; 0.1-0.5 part dispersion agent; 0.5-3 part alcoholic solvent; 2-10 part chromic acid solution; 40-100 part organic solvent.Further preferably, the black pigment described in black Dacroment masking liquid is one or more in graphite, gac, carbon black.Further preferably, the dispersion agent described in black Dacroment masking liquid is one or more in Dodecyl Polyoxyethylene Ether, tetradecyl alcohol Soxylat A 25-7, hexadecanol Soxylat A 25-7.Further preferably, the organic solvent described in black Dacroment masking liquid is one or more in benzene,toluene,xylene.Further preferably, the alcoholic solvent described in black Dacroment masking liquid is one or more in propyl alcohol, Virahol, propyl carbinol.
Embodiment 1: a kind of automobile-used iron chains pin, processes as follows:
Pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition as described below is first carried out acid pickling and rust removing, air-dry, then carries out Spheroidizing Annealing process by the raw material after air-dry, carries out bonderizing and wire drawing after samming process 6h at 770 DEG C; Described steel alloy is C:0.15%; Mn:1.55%; Mo:0.45%; Cr:2.60%; Ti:0.05%; B:0.002%; Al:0.10%; Ni:0.08%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
Thermal treatment: by automobile-used iron chains pin work in-process at 51 DEG C of insulation 50min, is warming up to 860 DEG C of insulation 60min, fast cooling to 550 DEG C insulation 80min, and be heated to 900 DEG C of insulation 50min, be then cooled to room temperature, the case depth after thermal treatment is 0.3mm;
Surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 120 DEG C of baking 10min, then at 350 DEG C, 30min is solidified, then in silicate water-borne coatings, sealing treatment is carried out, the temperature of sealing treatment is 355 DEG C, and the time is that 6min obtains automobile-used iron chains pin finished product.Wherein, described black Dacroment masking liquid comprises following component (counting by weight): 50 parts of epoxy resin; 15 parts of graphite, 15 parts of gacs; 55 parts of zinc powders; 0.3 part of Dodecyl Polyoxyethylene Ether; 2 parts of propanol solvent; 6 parts of chromic acid solutions; 60 parts of toluene solvants.
Embodiment 2: a kind of automobile-used iron chains pin, processes as follows:
Pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition as described below is first carried out acid pickling and rust removing, air-dry, then carries out Spheroidizing Annealing process by the raw material after air-dry, carries out bonderizing and wire drawing after samming process 5h-8h at 765 DEG C; Described steel alloy is C:0.16%; Mn:1.58%; Mo:0.55%; Cr:2.65%; Ti:0.04%; B:0.0025%; Al:0.08%; Ni:0.10%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
Thermal treatment: by automobile-used iron chains pin work in-process at 515 DEG C of insulation 60min, is warming up to 870 DEG C of insulation 50min, fast cooling to 540 DEG C insulation 90min, and be heated to 880 DEG C of insulation 70min, be then cooled to room temperature, the case depth after thermal treatment is 0.3mm;
Surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 125 DEG C of baking 12min, then at 355 DEG C, 32min is solidified, then in silicate water-borne coatings, sealing treatment is carried out, the temperature of sealing treatment is 355 DEG C, and the time is that 6min obtains automobile-used iron chains pin finished product.Wherein, described black Dacroment masking liquid comprises following component (counting by weight): 50 parts of epoxy resin; 35 parts of carbon blacks; 53 parts of zinc powders; 0.4 part of tetradecyl alcohol Soxylat A 25-7; 1 part of isopropanol solvent; 4 parts of chromic acid solutions; 80 parts of benzene solvents.
Embodiment 3: a kind of automobile-used iron chains pin, processes as follows:
Pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition as described below is first carried out acid pickling and rust removing, air-dry, then carries out Spheroidizing Annealing process by the raw material after air-dry, carries out bonderizing and wire drawing after samming process 5h-8h at 760 DEG C; Described steel alloy is C:0.18%; Mn:1.50%; Mo:0.60%; Cr:2.55%; Ti:0.06%; B:0.001%; Al:0.15%; Ni:0.05%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
Thermal treatment: by automobile-used iron chains pin work in-process at 500 DEG C of insulation 40min, is warming up to 850 DEG C of insulation 40min, fast cooling to 530 DEG C insulation 70min, and be heated to 870 DEG C of insulation 40min, be then cooled to room temperature, the case depth after thermal treatment is 0.2mm;
Surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 115 DEG C of baking 8min, then at 340 DEG C, 25min is solidified, then in silicate water-borne coatings, sealing treatment is carried out, the temperature of sealing treatment is 350 DEG C, and the time is that 4min obtains automobile-used iron chains pin finished product.Wherein, described black Dacroment masking liquid comprises following component (counting by weight): 50 parts of epoxy resin; 20 parts of gacs; 60 parts of zinc powders; 0.1 part of hexadecanol Soxylat A 25-7; 3 parts of n-butanol solvent; 2 parts of chromic acid solutions; 100 parts of xylene solvents.
Embodiment 4: a kind of automobile-used iron chains pin, processes as follows:
Pre-treatment: the automobile-used iron chains pin steel alloy used of chemical composition as described below is first carried out acid pickling and rust removing, air-dry, then carries out Spheroidizing Annealing process by the raw material after air-dry, carries out bonderizing and wire drawing after samming process 5h-8h at 780 DEG C; Described steel alloy is C:0.14%; Mn:1.60%; Mo:0.35%; Cr:2.70%; Ti:0.03%; B:0.003%; Al:0.06%; Ni:0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
Shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
Thermal treatment: by automobile-used iron chains pin work in-process at 520 DEG C of insulation 40min, is warming up to 880 DEG C of insulation 80min, fast cooling to 560 DEG C insulation 100min, and be heated to 910 DEG C of insulation 80min, be then cooled to room temperature, the case depth after thermal treatment is 0.4mm;
Surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 130 DEG C of baking 15min, then at 360 DEG C, 35min is solidified, then in silicate water-borne coatings, sealing treatment is carried out, the temperature of sealing treatment is 360 DEG C, and the time is that 8min obtains automobile-used iron chains pin finished product.Wherein, described black Dacroment masking liquid comprises following component (counting by weight): 50 parts of epoxy resin; 15 parts of graphite, 25 parts of carbon blacks; 50 parts of zinc powders; 0.5 part of Dodecyl Polyoxyethylene Ether; 0.5 part of isopropanol solvent; 8 parts of chromic acid solutions; 50 parts of benzene solvents, 20 parts of toluene solvants.
Detect the tensile strength sigma b of the automobile-used iron chains pin of embodiment 1-4, tensile strength σ s, hardness HRC, surface hardness HRC, shrinking percentage δ, elongation ψ and toughness (impact absorbing energy Akv), detected result is as shown in table 1:
The performance test results of the automobile-used iron chains pin obtained by common processing methods with 42CrMo in the automobile-used iron chains pin of table 1: embodiment 1-4 and prior art
As can be seen from Table 1, automobile-used iron chains pin of the present invention not only can reach the due requirement of high-strength pin steel in intensity and hardness, and make automobile-used iron chains pin hardness reach 26HRC, surface hardness reaches more than 31HRC, also significantly improves the solidity to corrosion of automobile-used iron chains pin.
Above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. an automobile-used iron chains pin, is characterized in that, described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.12%-0.20%; Mn:1.40%-1.70%; Mo:0.30%-0.80%; Cr:2.50-2.80%; Ti:0.02%-0.08%; B:0.0005%-0.0035%; Al:0.02%-0.20%; Ni:0.02-0.20%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
2. automobile-used iron chains pin according to claim 1, is characterized in that, described automobile-used iron chains pin is made up of the steel alloy of high strength, and described steel alloy is made up of the chemical composition of following mass percent: C:0.14%-0.18%; Mn:1.50%-1.60%; Mo:0.35%-0.60%; Cr:2.55-2.70%; Ti:0.03%-0.06%; B:0.001%-0.003%; Al:0.06%-0.15%; Ni:0.05-0.12%; Si≤0.30%; S≤0.035%; P≤0.035%, all the other are Fe.
3. a working method for automobile-used iron chains pin, is characterized in that, described working method comprises the steps:
S1, pre-treatment: the steel alloy of chemical composition as claimed in claim 1 is first carried out acid pickling and rust removing, air-dry, then carry out Spheroidizing Annealing process by the raw material after air-dry, carry out bonderizing and wire drawing after samming process 5h-8h at 760-780 DEG C;
S2, shaping: the raw material after above-mentioned process to be formed under the effect of upset force the shape needed for automobile-used iron chains pin, and carry out turning successively, groove milling, thread rolling obtain automobile-used iron chains pin work in-process;
S3, thermal treatment: by automobile-used iron chains pin work in-process at 500-520 DEG C of insulation 40-80min, be warming up to 850-880 DEG C of insulation 40-80min, and fast cooling, to 530-560 DEG C of insulation 70-100min, is heated to 870-910 DEG C of insulation 40-80min, is then cooled to room temperature;
S4, surface treatment: the automobile-used iron chains pin work in-process after thermal treatment are first cleaned oil removing, ball blast, dip-coating or spraying in black Dacroment masking liquid again, then through 115-130 DEG C of baking 8-15min, then at 340-360 DEG C, solidify 25-35min, obtain automobile-used iron chains pin finished product.
4. the working method of automobile-used iron chains pin according to claim 3, it is characterized in that, the case depth after step S3 thermal treatment is 0.2-0.4mm.
5. the working method of automobile-used iron chains pin according to claim 3, it is characterized in that, also comprise sealing treatment after step S4 black Dacroment process solidification, sealing treatment carries out in silicate water-borne coatings, the temperature of sealing treatment is 350-360 DEG C, and the time is 4-8min.
6. the working method of automobile-used iron chains pin according to claim 3, is characterized in that, the black Dacroment masking liquid described in step S4 surface treatment comprises following component (counting by weight): 50 parts of epoxy resin; 20-40 part black pigment; 50-60 part zinc powder; 0.1-0.5 part dispersion agent; 0.5-3 part alcoholic solvent; 2-10 part chromic acid solution; 40-100 part organic solvent.
7. the working method of automobile-used iron chains pin according to claim 6, is characterized in that, the black pigment described in black Dacroment masking liquid is one or more in graphite, gac, carbon black.
8. the working method of automobile-used iron chains pin according to claim 6, is characterized in that, the dispersion agent described in black Dacroment masking liquid is one or more in Dodecyl Polyoxyethylene Ether, tetradecyl alcohol Soxylat A 25-7, hexadecanol Soxylat A 25-7.
9. the working method of automobile-used iron chains pin according to claim 6, is characterized in that, the organic solvent described in black Dacroment masking liquid is one or more in benzene,toluene,xylene.
10. the working method of automobile-used iron chains pin according to claim 6, is characterized in that, the alcoholic solvent described in black Dacroment masking liquid is one or more in propyl alcohol, Virahol, propyl carbinol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563718.6A CN105063514B (en) | 2015-09-07 | 2015-09-07 | Iron chain pin for vehicles and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563718.6A CN105063514B (en) | 2015-09-07 | 2015-09-07 | Iron chain pin for vehicles and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105063514A true CN105063514A (en) | 2015-11-18 |
| CN105063514B CN105063514B (en) | 2017-05-10 |
Family
ID=54493013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510563718.6A Active CN105063514B (en) | 2015-09-07 | 2015-09-07 | Iron chain pin for vehicles and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105063514B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086680A (en) * | 2016-08-16 | 2016-11-09 | 宁波瑞国精机工业有限公司 | A kind of high strength nut and processing method thereof |
| CN109957647A (en) * | 2019-04-10 | 2019-07-02 | 宁波瑞国精机工业有限公司 | A kind of processing technology of automobile-used iron chains pin |
| CN110303304A (en) * | 2019-07-23 | 2019-10-08 | 重庆申耀机械工业有限责任公司 | A kind of processing technology of roller |
| CN111471928A (en) * | 2020-05-11 | 2020-07-31 | 河北普阳钢铁有限公司 | Wear-resistant steel plate with basket braided martensite metallographic structure and production method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286920A (en) * | 1976-01-16 | 1977-07-20 | Daido Steel Co Ltd | Soft nitriding low alloy steel |
| JPH08199287A (en) * | 1995-01-20 | 1996-08-06 | Sumitomo Metal Ind Ltd | High strength wear resistant steel excellent in breakage resistance |
| CN1646717A (en) * | 2002-04-03 | 2005-07-27 | 法国安达斯戴乐公司 | Bulk steel for the production of injection moulds for plastic material or for the production of pieces for working metals |
| JP2007291468A (en) * | 2006-04-26 | 2007-11-08 | Nippon Steel Corp | Medium carbon steel sheet and its production method |
| EP1905857A2 (en) * | 2006-09-29 | 2008-04-02 | EZM Edelstahlzieherei Mark GmbH | High-strength steel and applications for such steel |
| CN102559006A (en) * | 2011-12-13 | 2012-07-11 | 上海安福隆涂复工业有限公司 | Black dacromet paint |
| CN102766838A (en) * | 2012-07-05 | 2012-11-07 | 无锡市钻通工程机械有限公司 | Anti-rust, oil-resistant and antioxidation secondary steel surface treatment method |
| CN103757551A (en) * | 2013-12-12 | 2014-04-30 | 嵊州市特种链轮有限公司 | Mechanically actuated chain wheel material, and manufacturing method thereof |
-
2015
- 2015-09-07 CN CN201510563718.6A patent/CN105063514B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286920A (en) * | 1976-01-16 | 1977-07-20 | Daido Steel Co Ltd | Soft nitriding low alloy steel |
| JPH08199287A (en) * | 1995-01-20 | 1996-08-06 | Sumitomo Metal Ind Ltd | High strength wear resistant steel excellent in breakage resistance |
| CN1646717A (en) * | 2002-04-03 | 2005-07-27 | 法国安达斯戴乐公司 | Bulk steel for the production of injection moulds for plastic material or for the production of pieces for working metals |
| JP2007291468A (en) * | 2006-04-26 | 2007-11-08 | Nippon Steel Corp | Medium carbon steel sheet and its production method |
| EP1905857A2 (en) * | 2006-09-29 | 2008-04-02 | EZM Edelstahlzieherei Mark GmbH | High-strength steel and applications for such steel |
| CN102559006A (en) * | 2011-12-13 | 2012-07-11 | 上海安福隆涂复工业有限公司 | Black dacromet paint |
| CN102766838A (en) * | 2012-07-05 | 2012-11-07 | 无锡市钻通工程机械有限公司 | Anti-rust, oil-resistant and antioxidation secondary steel surface treatment method |
| CN103757551A (en) * | 2013-12-12 | 2014-04-30 | 嵊州市特种链轮有限公司 | Mechanically actuated chain wheel material, and manufacturing method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086680A (en) * | 2016-08-16 | 2016-11-09 | 宁波瑞国精机工业有限公司 | A kind of high strength nut and processing method thereof |
| CN106086680B (en) * | 2016-08-16 | 2018-02-09 | 宁波瑞国精机工业有限公司 | A kind of high strength nut and its processing method |
| CN109957647A (en) * | 2019-04-10 | 2019-07-02 | 宁波瑞国精机工业有限公司 | A kind of processing technology of automobile-used iron chains pin |
| CN110303304A (en) * | 2019-07-23 | 2019-10-08 | 重庆申耀机械工业有限责任公司 | A kind of processing technology of roller |
| CN110303304B (en) * | 2019-07-23 | 2022-03-15 | 重庆申耀机械工业有限责任公司 | Processing technique of roller |
| CN111471928A (en) * | 2020-05-11 | 2020-07-31 | 河北普阳钢铁有限公司 | Wear-resistant steel plate with basket braided martensite metallographic structure and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105063514B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105112789A (en) | Hinge pin and machining method thereof | |
| CN105063514A (en) | Iron chain pin for vehicles and processing method thereof | |
| CN105063476B (en) | A kind of bolt and its processing method | |
| CN103290306B (en) | Wear, corrosion and rust resistant metal pipeline | |
| CN106086680B (en) | A kind of high strength nut and its processing method | |
| CN113235005B (en) | Cast bainite steel for semi-autogenous mill, preparation method thereof and cast bainite steel lining plate for semi-autogenous mill | |
| CN104696379B (en) | Section fork product and preparation method thereof | |
| CN105177456A (en) | Corrosion-resistant bolt alloy material and manufacturing method of bolts | |
| US20220025474A1 (en) | 785 MPa LEVEL EXTRA-THICK QUENCHED AND TEMPERED RACK STEEL PLATE FOR OFFSHORE PLATFORMS AND PREPARATION METHOD THEREFOR | |
| CN103276281B (en) | Preparation method for wear resistant metal pipeline with internal anticorrosive coating | |
| CN106282819B (en) | A kind of high-strength pin and its processing method | |
| CN109837469A (en) | A kind of automobile-used iron chains pin and its processing method | |
| CN108728840A (en) | A kind of steel construction piece anti-corrosive treatment method | |
| CN109837466A (en) | A kind of pin shaft and its processing method | |
| CN103290332A (en) | Wear-resistant metal pipeline with inner corrosion-resistant coating | |
| CN102994906A (en) | Preparation method of ball valve body | |
| CN110157973A (en) | A kind of high-strength corrosion-resistant erosion automobile stainless steel plate and preparation method thereof | |
| CN104561972B (en) | Chromium-free passivating treatment agent before a kind of cast aluminium alloy Workpiece coating | |
| CN104562050A (en) | Preparation method of heavy-duty gear | |
| CN109957647A (en) | A kind of processing technology of automobile-used iron chains pin | |
| CN103537669A (en) | Powder-metallurgy automobile booster pump stator and manufacturing method thereof | |
| CN104264061B (en) | A kind of automobile engine forging and forging method thereof | |
| CN103820724B (en) | A kind of thickness is high-strength corrosion-resistant tie and the production method thereof of 1.1mm | |
| CN106010025A (en) | Rust inhibiting coating for steel and preparation method of rust inhibiting coating | |
| CN105755390A (en) | Coal machine pin-track and coal machine scraper cast by ultra-high strength wear-resistant steel and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |