CN103639402A - Method for manufacturing prestress steel strand coated with nichrome powder - Google Patents
Method for manufacturing prestress steel strand coated with nichrome powder Download PDFInfo
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- CN103639402A CN103639402A CN201310588693.6A CN201310588693A CN103639402A CN 103639402 A CN103639402 A CN 103639402A CN 201310588693 A CN201310588693 A CN 201310588693A CN 103639402 A CN103639402 A CN 103639402A
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Abstract
The invention discloses a method for manufacturing a prestress steel strand coated with nichrome powder. The method for manufacturing the prestress steel strand coated with the nichrome powder comprises the following steps that (1) the nichrome powder comprises, by weight, 0.5-3.2% of Re, 48-54% of Ni, 18-32% of Cr, 1.6-5.5% of Si, 0.3-0.8% of S, 0.5-2.2% of C, 10-16% of Fe, 1.2-10% of Mn, and 1-2.5% of composite rear earth; (2) a plurality of wire rod steel wires are fed into a heating furnace; (3) the nichrome powder is evenly sprayed on the surfaces of the wire rod steel wires through a spray gun; (4) the wire rod steel wires are stranded through a stranding machine to form the steel strand which is of a steel wire rope shape; (5) the steel strand enters a quenching device; (6) the nichrome powder is evenly sprayed on the surface of the steel strand again through the spray gun; (7) the steel strand enters a layer winder to be packaged. According to the method for manufacturing the prestress steel strand coated with the nichrome powder, the strength, wear resistance and corrosion resistance of the steel strand are improved.
Description
Technical field
The present invention relates to a kind of processing method of steel strand wires, specifically the manufacture method of the coated prestress wire of a kind of nichrome powder.
Background technology
At present, in existing technical conditions, when using steel strand wires, the environment of use is extremely severe, in a lot of situations, there is corrosive gas or liquid, be easy to cause steel strand wires to be corroded, get rusty, greatly reduce the service life of reinforcing bar, and caused certain potential safety hazard, increase production cost, wasted a large amount of human and material resources and keeped in repair, wasted a large amount of resources.
Summary of the invention
Technical problem to be solved by this invention is, shortcoming for above prior art, the manufacture method of the coated prestress wire of a kind of nichrome powder is proposed, realized the coated one deck nichrome of steel strand surface, not only increased the intensity of steel strand wires, and having increased the corrosion resistance of steel strand wires, wearability, has increased service life of steel strand wires.
In order to solve the problems of the technologies described above, technical scheme of the present invention is achieved in the following ways: the method is carried out according to the following steps:
(1) configure nichrome powder, nichrome powder by weight percentage chemical composition is: Re:0.5～3.2%, Ni:48～54%, Cr:18～32%, Si:1.6～5.5%, S:0.3～0.8%, C:0.5～2.2%, Fe: 10-16%, Mn: 1.2～10%, compound rare-earth: 1～2.5%, above each component sum is 100%;
In compound rare-earth, comprise by weight percentage following component: La:22～32%, Y:12～18%, Sc:8～12%, Gd:3～5%, Sm:5～7%, Ce:12～18%, Pr:13～21%; Each component sum is 100% above;
(2) many wire rod steel wires are sent into heating furnace and be heated to 920-980 ℃, be incubated 10-20 second, then by online the first refrigerating work procedure, many wire rod steel wire fast speeds are cooled to 500-550 ℃, then in quenching unit, water or quenching liquid are cooled to below 80 ℃, then through tempering heating furnace, be heated to 600-700 ℃ of tempering, then pass through the second refrigerating work procedure by the fast cool to room temperature of reinforcing bar;
(3) then send in the first thermal spraying apparatus, nichrome powder uniformly sprays many wire rod Steel Wire Surface by spray gun, and the thickness of spraying is 0.02-0.08mm; Then enter heating furnace and be heated to rapidly 750-800 ℃, be incubated 30-40 second, then many wire rod steel wires are sent into the 3rd refrigerating work procedure fast speed and be cooled to 420-460 ℃, then enter the interior water of quenching unit or quenching liquid and be cooled to below 50 ℃, be incubated 15-20 second;
(4) many wire rod steel wires are sent in wire twisting machine, by wire twisting machine, be twisted into the steel strand wires of steel wire rope form, then steel strand wires enter in preheating intermediate frequency furnace, in 2 seconds, steel strand wires are heated to more than 750 ℃, and then steel strand wires are accessed to superaudio stove, in 4 seconds, make steel strand wires be heated to more than 950 ℃;
(5) steel strand wires enter in quenching cooler, carry out Quenching Treatment, in 6 seconds, the steel strand wires that heated are cooled to rapidly below 100 ℃ with the surface that 10MPa impacts steel strand wires with the current of upward pressure along the diametric(al) of steel strand wires;
(6) then send in the second thermal spraying apparatus, nichrome powder uniformly sprays at steel strand surface by spray gun, and the thickness of spraying is 0.05-0.1mm; Then enter heating furnace and be heated to rapidly 750-800 ℃, be incubated 30-40 second, then steel strand wires are sent into the 4th refrigerating work procedure fast speed cool to room temperature, then steel strand wires access admission machine;
(7) last steel strand wires enter laying rolling machine and pack, and check warehouse-in.
Like this, by technical scheme of the present invention, realized the coated one deck nichrome of steel strand surface, not only increased the intensity of steel strand wires, and increased the corrosion resistance of steel strand wires, wearability, has increased service life of steel strand wires.
The technical scheme that the present invention further limits is:
The manufacture method of the coated prestress wire of aforesaid nichrome powder, the first refrigerating work procedure: adopt water-cooled with the cooldown rate of 20-25 ℃/s by many wire rod steel wire water-cooleds to 500-550 ℃.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, the second refrigerating work procedure: adopt water-cooled with the cooldown rate of 15-20 ℃/s by many wire rod steel wire water-cooleds to room temperature.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, the 3rd refrigerating work procedure: adopt the air-cooled cooldown rate with 5-10 ℃/s by many wire rod steel wire water-cooleds to 420-460 ℃.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, the 4th refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the cooldown rate of 3.5-10 ℃/s by steel strand wires water-cooled to 390-410 ℃, then air cooling is to 250-280 ℃, adopt again water-cooled with the cooldown rate of 8-25 ℃/s by steel strand wires water-cooled to 100-150 ℃, last air cooling is to room temperature.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, nichrome powder by weight percentage chemical composition is: Re:0.8%, Ni:48%, Cr:18%, Si:1.6%, S:0.3%, C:0.5%, Fe: 10%, Mn: 1.2 %, compound rare-earth: 1.3%;
In compound rare-earth, comprise by weight percentage following component: La:22%, Y:12%, Sc:8%, Gd:3%, Sm:5%, Ce:12%, Pr:13%.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, nichrome powder by weight percentage chemical composition is: Re:2.3%, Ni:50%, Cr:26%, Si:3.2%, S:0.7%, C:1.2%, Fe: 13%, Mn: 5%, compound rare-earth: 1.6%;
In compound rare-earth, comprise by weight percentage following component: La:25%, Y:16%, Sc:10%, Gd:4%, Sm:6%, Ce:14%, Pr:18%.
The manufacture method of the coated prestress wire of aforesaid nichrome powder, nichrome powder by weight percentage chemical composition is: Re:3.2%, Ni:54%, Cr:32%, Si:5.5%, S:0.8%, C:2.2%, Fe: 16%, Mn: 10%, compound rare-earth: 2.5%;
In compound rare-earth, comprise by weight percentage following component: La:32%, Y:18%, Sc:12%, Gd:5%, Sm:7%, Ce:18%, Pr:21%.
The invention has the beneficial effects as follows:
In production technology of the present invention, prestress wire, successively by operations such as heating-cooling-quenching-cooling-tempering-cooling-heat-cooling, can be improved to intensity, toughness and the fatigue strength of steel strand wires greatly; Through the 4th process for cooling, be cooled to normal temperature, by the setting of temperature and special process for cooling, can make carbide fully dissolve on the one hand, evenly diffusion, avoided carbide to cause intercrystalline corrosion and spot corrosion to exceed standard separating out of intergranular, guaranteed that the ferrite content of material is greater than 25%; On the other hand, can also make material solid solution abundant, avoid heat treatment mode to heat that corrosion rate that uneven solid solution inequality brings exceeds standard and hardness exceeds standard, and made nichrome perfectly be coated on the surface of steel strand wires.
In composition of the present invention owing to adding Mn: 1.2～10%, Ni:48～54%, Cr:18～32%, Si:1.6～5.5%, S:0.3～0.8%, add Mn to improve steel toughness, intensity, hardness and wearability, wearability; Add the high-temperature oxidation resistance that Ni, Cr can improve steel strand wires, intensity; Adding S can improve machinability, build surface accuracy; Scale while adding Si to reduce high temperature produces, increases that heat resistance, elevated temperature strength are good, the stable element of ferrite phase.
In production technology of the present invention, the steel strand wires that heating is completed are without insulation, make steel strand surface temperature have little time to discharge, austenite enters ferritic transformation process to be shortened, form the superfine ferrite of appropriate grain size, make steel strand wires ferrite content in 25% left and right, the ferrite of grain refinement not only can improve toughness can also improve intensity, in addition, there is continuous modification with relieve stresses in the ferrite of 25% left and right when stretching.
The present invention has realized the coated one deck nichrome of steel strand surface, has not only increased the intensity of steel strand wires, and has increased the corrosion resistance of steel strand wires, wearability, non-oxidizability, has increased service life of steel strand wires, save a large amount of resources, improved the competitiveness of product.
The specific embodiment
Below the present invention is described in further detail:
embodiment 1
The manufacture method of the coated prestress wire of a kind of nichrome powder that the present embodiment provides, the method is carried out according to the following steps:
(1) configure nichrome powder, nichrome powder by weight percentage chemical composition is: Re:0.8%, Ni:48%, Cr:18%, Si:1.6%, S:0.3%, C:0.5%, Fe: 10%, Mn: 1.2 %, compound rare-earth: 1.3%;
In compound rare-earth, comprise by weight percentage following component: La:22%, Y:12%, Sc:8%, Gd:3%, Sm:5%, Ce:12%, Pr:13%;
(2) many wire rod steel wires are sent into heating furnace and be heated to 920 ℃, be incubated 10 seconds, then by online the first refrigerating work procedure: adopt water-cooled with the cooldown rate of 20 ℃/s by many wire rod steel wire water-cooleds to 500 ℃, then in quenching unit, water or quenching liquid are cooled to below 80 ℃, then through tempering heating furnace, be heated to 600 ℃ of tempering, then by the second refrigerating work procedure: adopt water-cooled with the cooldown rate of 15 ℃/s by many wire rod steel wire water-cooleds to room temperature;
(3) then send in the first thermal spraying apparatus, nichrome powder uniformly sprays many wire rod Steel Wire Surface by spray gun, and the thickness of spraying is 0.02mm; Then enter heating furnace and be heated to rapidly 750 ℃, be incubated 30 seconds, then many wire rod steel wires are sent into the 3rd refrigerating work procedure: adopt the air-cooled cooldown rate with 5 ℃/s by many wire rod steel wire water-cooleds to 420 ℃, then enter the interior water of quenching unit or quenching liquid and be cooled to below 50 ℃, be incubated 15 seconds;
(4) many wire rod steel wires are sent in wire twisting machine, by wire twisting machine, be twisted into the steel strand wires of steel wire rope form, then steel strand wires enter in preheating intermediate frequency furnace, in 2 seconds, steel strand wires are heated to 750 ℃, and then steel strand wires are accessed to superaudio stove, in 4 seconds, make steel strand wires be heated to 950 ℃;
(5) steel strand wires enter in quenching cooler, carry out Quenching Treatment, in 6 seconds, the steel strand wires that heated are cooled to rapidly to 100 ℃ with the surface that 10MPa impacts steel strand wires with the current of upward pressure along the diametric(al) of steel strand wires;
(6) then send in the second thermal spraying apparatus, nichrome powder uniformly sprays at steel strand surface by spray gun, and the thickness of spraying is 0.05mm; Then enter heating furnace and be heated to rapidly 750 ℃, be incubated 30 seconds, then steel strand wires are sent into the 4th refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the cooldown rate of 3.5 ℃/s by steel strand wires water-cooled to 390 ℃, then air cooling to 250 ℃, adopt again water-cooled with the cooldown rate of 8 ℃/s by steel strand wires water-cooled to 100 ℃, last air cooling is to room temperature, then steel strand wires access admission machine;
(7) last steel strand wires enter laying rolling machine and pack, and check warehouse-in.
embodiment 2
The manufacture method of the coated prestress wire of a kind of nichrome powder that the present embodiment provides, the method is carried out according to the following steps:
(1) configure nichrome powder, nichrome powder by weight percentage chemical composition is: Re:2.3%, Ni:50%, Cr:26%, Si:3.2%, S:0.7%, C:1.2%, Fe: 13%, Mn: 5%, and compound rare-earth: 1.6%;
In compound rare-earth, comprise by weight percentage following component: La:25%, Y:16%, Sc:10%, Gd:4%, Sm:6%, Ce:14%, Pr:18%;
(2) many wire rod steel wires are sent into heating furnace and be heated to 980 ℃, be incubated 20 seconds, then by online the first refrigerating work procedure: adopt water-cooled with the cooldown rate of 25 ℃/s by many wire rod steel wire water-cooleds to 550 ℃, then in quenching unit, water or quenching liquid are cooled to below 80 ℃, then through tempering heating furnace, be heated to 700 ℃ of tempering, then by the second refrigerating work procedure: adopt water-cooled with the cooldown rate of 20 ℃/s by many wire rod steel wire water-cooleds to room temperature;
(3) then send in the first thermal spraying apparatus, nichrome powder uniformly sprays many wire rod Steel Wire Surface by spray gun, and the thickness of spraying is 0.08mm; Then enter heating furnace and be heated to rapidly 800 ℃, be incubated 40 seconds, then many wire rod steel wires are sent into the 3rd refrigerating work procedure: adopt the air-cooled cooldown rate with 10 ℃/s by many wire rod steel wire water-cooleds to 460 ℃, then enter the interior water of quenching unit or quenching liquid and be cooled to below 50 ℃, be incubated 20 seconds;
(4) many wire rod steel wires are sent in wire twisting machine, by wire twisting machine, be twisted into the steel strand wires of steel wire rope form, then steel strand wires enter in preheating intermediate frequency furnace, in 2 seconds, steel strand wires are heated to 820 ℃, and then steel strand wires are accessed to superaudio stove, in 4 seconds, make steel strand wires be heated to 980 ℃;
(5) steel strand wires enter in quenching cooler, carry out Quenching Treatment, in 6 seconds, the steel strand wires that heated are cooled to rapidly to 80 ℃ with the surface that 10MPa impacts steel strand wires with the current of upward pressure along the diametric(al) of steel strand wires;
(6) then send in the second thermal spraying apparatus, nichrome powder uniformly sprays at steel strand surface by spray gun, and the thickness of spraying is 0.1mm; Then enter heating furnace and be heated to rapidly 800 ℃, be incubated 40 seconds, then steel strand wires are sent into the 4th refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the cooldown rate of 10 ℃/s by steel strand wires water-cooled to 410 ℃, then air cooling to 280 ℃, adopt again water-cooled with the cooldown rate of 25 ℃/s by steel strand wires water-cooled to 150 ℃, last air cooling is to room temperature, then steel strand wires access admission machine;
(7) last steel strand wires enter laying rolling machine and pack, and check warehouse-in.
embodiment 3
The manufacture method of the coated prestress wire of a kind of nichrome powder that the present embodiment provides, the method is carried out according to the following steps:
(1) configure nichrome powder, nichrome powder by weight percentage chemical composition is: Re:2.3%, Ni:50%, Cr:26%, Si:3.2%, S:0.7%, C:1.2%, Fe: 13%, Mn: 5%, and compound rare-earth: 1.6%;
In compound rare-earth, comprise by weight percentage following component: La:25%, Y:16%, Sc:10%, Gd:4%, Sm:6%, Ce:14%, Pr:18%;
(2) many wire rod steel wires are sent into heating furnace and be heated to 940 ℃, be incubated 15 seconds, then by online the first refrigerating work procedure: adopt water-cooled with the cooldown rate of 22 ℃/s by many wire rod steel wire water-cooleds to 530 ℃, then in quenching unit, water or quenching liquid are cooled to below 80 ℃, then through tempering heating furnace, be heated to 680 ℃ of tempering, then by the second refrigerating work procedure: adopt water-cooled with the cooldown rate of 18 ℃/s by many wire rod steel wire water-cooleds to room temperature;
(3) then send in the first thermal spraying apparatus, nichrome powder uniformly sprays many wire rod Steel Wire Surface by spray gun, and the thickness of spraying is 0.05mm; Then enter heating furnace and be heated to rapidly 780 ℃, be incubated 35 seconds, then many wire rod steel wires are sent into the 3rd refrigerating work procedure: adopt the air-cooled cooldown rate with 8 ℃/s by many wire rod steel wire water-cooleds to 450 ℃, then enter the interior water of quenching unit or quenching liquid and be cooled to below 50 ℃, be incubated 18 seconds;
(4) many wire rod steel wires are sent in wire twisting machine, by wire twisting machine, be twisted into the steel strand wires of steel wire rope form, then steel strand wires enter in preheating intermediate frequency furnace, in 2 seconds, steel strand wires are heated to 760 ℃, and then steel strand wires are accessed to superaudio stove, in 4 seconds, make steel strand wires be heated to 960 ℃;
(5) steel strand wires enter in quenching cooler, carry out Quenching Treatment, in 6 seconds, the steel strand wires that heated are cooled to rapidly to 30 ℃ with the surface that 10MPa impacts steel strand wires with the current of upward pressure along the diametric(al) of steel strand wires;
(6) then send in the second thermal spraying apparatus, nichrome powder uniformly sprays at steel strand surface by spray gun, and the thickness of spraying is 0.06mm; Then enter heating furnace and be heated to rapidly 780 ℃, be incubated 34 seconds, then steel strand wires are sent into the 4th refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the cooldown rate of 8 ℃/s by steel strand wires water-cooled to 400 ℃, then air cooling to 260 ℃, adopt again water-cooled with the cooldown rate of 20 ℃/s by steel strand wires water-cooled to 120 ℃, last air cooling is to room temperature, then steel strand wires access admission machine;
(7) last steel strand wires enter laying rolling machine and pack, and check warehouse-in.
So just, producing intensity is prestress wire more than 2500MPa, and realized the coated one deck nichrome of steel strand surface, not only increased the intensity of steel strand wires, and increased the corrosion resistance of steel strand wires, wearability, non-oxidizability, has increased service life of steel strand wires, save a large amount of resources, improved the competitiveness of product.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection domain of the present invention.
Claims (8)
1. nichrome powder is coated a manufacture method for prestress wire, it is characterized in that: the method is carried out according to the following steps:
(1) configure nichrome powder, described nichrome powder by weight percentage chemical composition is: Re:0.5～3.2%, Ni:48～54%, Cr:18～32%, Si:1.6～5.5%, S:0.3～0.8%, C:0.5～2.2%, Fe: 10-16%, Mn: 1.2～10%, compound rare-earth: 1～2.5%, above each component sum is 100%;
In described compound rare-earth, comprise by weight percentage following component: La:22～32%, Y:12～18%, Sc:8～12%, Gd:3～5%, Sm:5～7%, Ce:12～18%, Pr:13～21%; Each component sum is 100% above;
(2) many wire rod steel wires are sent into heating furnace and be heated to 920-980 ℃, be incubated 10-20 second, then by online the first refrigerating work procedure, many wire rod steel wire fast speeds are cooled to 500-550 ℃, then in quenching unit, water or quenching liquid are cooled to below 80 ℃, then through tempering heating furnace, be heated to 600-700 ℃ of tempering, then pass through the second refrigerating work procedure by the fast cool to room temperature of reinforcing bar;
(3) then send in the first thermal spraying apparatus, nichrome powder uniformly sprays many wire rod Steel Wire Surface by spray gun, and the thickness of spraying is 0.02-0.08mm; Then enter heating furnace and be heated to rapidly 750-800 ℃, be incubated 30-40 second, then many wire rod steel wires are sent into the 3rd refrigerating work procedure fast speed and be cooled to 420-460 ℃, then enter the interior water of quenching unit or quenching liquid and be cooled to below 50 ℃, be incubated 15-20 second;
(4) many wire rod steel wires are sent in wire twisting machine, by wire twisting machine, be twisted into the steel strand wires of steel wire rope form, then steel strand wires enter in preheating intermediate frequency furnace, in 2 seconds, steel strand wires are heated to more than 750 ℃, and then steel strand wires are accessed to superaudio stove, in 4 seconds, make steel strand wires be heated to more than 950 ℃;
(5) steel strand wires enter in quenching cooler, carry out Quenching Treatment, in 6 seconds, the steel strand wires that heated are cooled to rapidly below 100 ℃ with the surface that 10MPa impacts steel strand wires with the current of upward pressure along the diametric(al) of steel strand wires;
(6) then send in the second thermal spraying apparatus, nichrome powder uniformly sprays at steel strand surface by spray gun, and the thickness of spraying is 0.05-0.1mm; Then enter heating furnace and be heated to rapidly 750-800 ℃, be incubated 30-40 second, then steel strand wires are sent into the 4th refrigerating work procedure fast speed cool to room temperature, then steel strand wires access admission machine;
(7) last steel strand wires enter laying rolling machine and pack, and check warehouse-in.
2. the manufacture method of the coated prestress wire of nichrome powder according to claim 1, is characterized in that: described the first refrigerating work procedure: adopt water-cooled with the cooldown rate of 20-25 ℃/s by many wire rod steel wire water-cooleds to 500-550 ℃.
3. the manufacture method of the coated prestress wire of nichrome powder according to claim 1, is characterized in that: described the second refrigerating work procedure: adopt water-cooled with the cooldown rate of 15-20 ℃/s by many wire rod steel wire water-cooleds to room temperature.
4. the manufacture method of the coated prestress wire of nichrome powder according to claim 1, is characterized in that: described the 3rd refrigerating work procedure: adopt the air-cooled cooldown rate with 5-10 ℃/s by many wire rod steel wire water-cooleds to 420-460 ℃.
5. nichrome powder according to claim 1 is coated the manufacture method of prestress wire, it is characterized in that: described the 4th refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the cooldown rate of 3.5-10 ℃/s by steel strand wires water-cooled to 390-410 ℃, then air cooling is to 250-280 ℃, adopt again water-cooled with the cooldown rate of 8-25 ℃/s by steel strand wires water-cooled to 100-150 ℃, last air cooling is to room temperature.
6. nichrome powder according to claim 1 is coated the manufacture method of prestress wire, it is characterized in that: described nichrome powder by weight percentage chemical composition is: Re:0.8%, Ni:48%, Cr:18%, Si:1.6%, S:0.3%, C:0.5%, Fe: 10%, Mn: 1.2 %, compound rare-earth: 1.3%;
In described compound rare-earth, comprise by weight percentage following component: La:22%, Y:12%, Sc:8%, Gd:3%, Sm:5%, Ce:12%, Pr:13%.
7. nichrome powder according to claim 1 is coated the manufacture method of prestress wire, it is characterized in that: described nichrome powder by weight percentage chemical composition is: Re:2.3%, Ni:50%, Cr:26%, Si:3.2%, S:0.7%, C:1.2%, Fe: 13%, Mn: 5%, compound rare-earth: 1.6%;
In described compound rare-earth, comprise by weight percentage following component: La:25%, Y:16%, Sc:10%, Gd:4%, Sm:6%, Ce:14%, Pr:18%.
8. nichrome powder according to claim 1 is coated the manufacture method of prestress wire, it is characterized in that: described nichrome powder by weight percentage chemical composition is: Re:3.2%, Ni:54%, Cr:32%, Si:5.5%, S:0.8%, C:2.2%, Fe: 16%, Mn: 10%, compound rare-earth: 2.5%;
In described compound rare-earth, comprise by weight percentage following component: La:32%, Y:18%, Sc:12%, Gd:5%, Sm:7%, Ce:18%, Pr:21%.
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| CN104372204A (en) * | 2014-11-14 | 2015-02-25 | 盐城丰工机械有限公司 | Rare earth element coating for high-strength supports and treatment process thereof |
| CN104404429A (en) * | 2014-11-08 | 2015-03-11 | 江苏天舜金属材料集团有限公司 | Steel strand wire rod with rare earth element coating and production method thereof |
| CN106591706A (en) * | 2016-12-15 | 2017-04-26 | 苏州纽东精密制造科技有限公司 | High-strength reinforcing steel bar for automobile |
| CN106930129A (en) * | 2017-01-19 | 2017-07-07 | 辽宁通达建材实业有限公司 | Underrelaxation epoxy coating prestress wire production method |
| CN107460284A (en) * | 2017-08-29 | 2017-12-12 | 安徽省含山县兴建铸造厂 | A kind of method for improving stockbridge damper steel strand wires service life |
| CN111748674A (en) * | 2020-07-13 | 2020-10-09 | 金华市小狸新材料科技有限责任公司 | Tempering process based on metal heat treatment |
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