CN104789885A - Corrosion-resistant stainless steel oil delivery pipe and processing technology thereof - Google Patents
Corrosion-resistant stainless steel oil delivery pipe and processing technology thereof Download PDFInfo
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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Abstract
The invention discloses a corrosion-resistant stainless steel oil delivery pipe and a processing technology thereof. A selected steel blank material comprises the following chemical components in percentage by weight: 0.11-0.13% of C, 0.35-0.55% of Ni, 0.12-0.14% of Si, 0.67-0.69% of Mn, 0.82-0.86% of Ti, 2.21-2.25% of Cr, 0.27-0.29% of Nb, 0.71-0.73% of W, 0.13-0.16% of V, 0.13-0.15% of Mo, 0.008-0.010% of N, 0.002-0.004% of P, 0.001-0.003% of S and the balance of Fe and inevitable impurities. The corrosion-resistant stainless steel oil delivery pipe disclosed by the invention is simple in process, scientific and environmental-friendly in design stable in performance, corrosion-resistant, high-temperature-resistant, low in possibility of ageing and damage and long in service life.
Description
Technical field
The invention belongs to technical field of hydraulic equipment, particularly a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof.
Background technology
Hydraulic Station is the hydraulic power source device be made up of hydro-pump, drive motor, fuel tank, directional valve, throttling valve, surplus valve etc. or the hydraulic efficiency plant comprising control valve.By the flow direction of drive unit requirement, pressure and flow fuel feeding, what be applicable to that drive unit is separated with Hydraulic Station is mechanically various, and be connected with drive unit oil pipe by Hydraulic Station, hydraulic efficiency system can realize the action of various regulation.
During Hydraulic Station work, driven by motor oil pump rotates, pump is bought oil after oil suction from fuel tank, be the pressure energy of hydraulic efficiency oil by changes mechanical energy, in the oil cylinder being transferred to hydraulic machinery through external pipeline after hydraulic efficiency oil is achieved direction, pressure, Flow-rate adjustment by integrated package by hydraulicvalve or oil motor, thus control the speed of the conversion in hydraulic motor direction, the size of strength and speed, promote the acting of various hydraulic machinery.One of groundwork component of Hydraulic Station are exactly transition pipeline, and oil transportation tubing is generally steel pipe, use welding to be connected with the coupling device such as flange, and use valve to carry out open and close controlling and Flow-rate adjustment.The stopping property of transition pipeline, erosion resistance and its resistance to elevated temperatures, determine working efficiency and the work-ing life of Hydraulic Station.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, present invention process is simple, design science environmental protection, and these product performance are stablized, corrosion-resistant and high-temperature resistant, not easily aged deterioration, long service life.
In order to solve above technical problem, the invention provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.11-0.13%, Ni:0.35-0.55%, Si:0.12-0.14%, Mn:0.67-0.69%, Ti:0.82-0.86%, Cr:2.21-2.25%, Nb:0.27-0.29%, W:0.71-0.73%, V:0.13-0.16%, Mo:0.13-0.15%, N:0.008-0.010%, P:0.002-0.004%, S:0.001-0.003%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Containing following trace element in the alloy billet that the present invention selects, wherein: carbon, yield-point and tensile strength is improved; Silicon, as reductive agent and reductor, can significantly improve the elastic limit of steel, yield-point and tensile strength, the combinations such as silicon and molybdenum, tungsten, chromium, are improved erosion resistance and oxidation resistant effect; Manganese is good reductor and sweetening agent, makes steel not only have enough toughness, and has higher intensity and hardness, improves the quenching property of steel, improves the hot workability of steel, improves wear resistance; Chromium, can significantly improve intensity, hardness and wear resistance, improves oxidation-resistance and the erosion resistance of steel; Nickel, improves the intensity of steel, keeps good plasticity and toughness, have higher corrosion resistance to soda acid, at high temperature have antirust and temperature capacity; Molybdenum, can make the grain refining of steel, improves hardening capacity and thermostrength, keeps enough intensity and creep resisting ability when high temperature, improves mechanical property; Titanium, is strong reductor, can makes the dense internal organization of steel, crystal grain thinning power, and reduce aging sensitivity and cold shortness, improving welding property, avoids intergranular corrosion; Tungsten, forming wolfram varbide with carbon has very high hardness and wear resistance; Niobium, niobium energy crystal grain thinning, reduce superheated susceptivity and the temper brittleness of steel, improve intensity, improving welding property, prevents intergranular corrosion phenomenon.
Above-mentioned steel blank is placed in process furnace and is heated to 970-990 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 5:1 to 3:1;
The steel tube blank obtained is warming up to 1050-1070 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 2-4 hour;
The steel tube blank completing carburizing is cooled to 550-590 DEG C and is incubated, soaking time is 3-5 hour, then with the speed of cooling of 6-8 DEG C/s by steel tube blank water-cooled to 280-340 DEG C, then by steel tube blank air cooling to room temperature;
Melted down by above-mentioned cooled steel tube blank and be heated to 810-830 DEG C, and be incubated 5-6 hour, then oil cooling is to 460-520 DEG C, insulation 1.5-2 hour, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
The technical scheme that the present invention limits further is:
The invention provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.11%, Ni:0.35%, Si:0.12%, Mn:0.67%, Ti:0.82%, Cr:2.21%, Nb:0.27%, W:0.71%, V:0.13%, Mo:0.13%, N:0.008%, P:0.002%, S:0.001%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 970 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 5:1;
The steel tube blank obtained is warming up to 1050 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 4 hours;
The steel tube blank completing carburizing is cooled to 550 DEG C and is incubated, soaking time is 5 hours, then with the speed of cooling of 6 DEG C/s by steel tube blank water-cooled to 280 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 810 DEG C, and be incubated 6 hours, then oil cooling to 460 DEG C, be incubated 2 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
The invention provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.13%, Ni:0.55%, Si:0.14%, Mn:0.69%, Ti:0.86%, Cr:2.25%, Nb:0.29%, W:0.73%, V:0.16%, Mo:0.15%, N:0.010%, P:0.004%, S:0.003%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 990 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 3:1;
The steel tube blank obtained is warming up to 1070 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 2 hours;
The steel tube blank completing carburizing is cooled to 590 DEG C and is incubated, soaking time is 3 hours, then with the speed of cooling of 8 DEG C/s by steel tube blank water-cooled to 340 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 830 DEG C, and be incubated 5 hours, then oil cooling to 520 DEG C, be incubated 1.5 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
The invention provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.12%, Ni:0.45%, Si:0.13%, Mn:0.68%, Ti:0.84%, Cr:2.23%, Nb:0.28%, W:0.72%, V:0.14%, Mo:0.14%, N:0.009%, P:0.003%, S:0.002%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 980 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 4:1;
The steel tube blank obtained is warming up to 1060 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 3 hours;
The steel tube blank completing carburizing is cooled to 570 DEG C and is incubated, soaking time is 4 hours, then with the speed of cooling of 7 DEG C/s by steel tube blank water-cooled to 310 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 820 DEG C, and be incubated 5.5 hours, then oil cooling to 490 DEG C, be incubated 1.8 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
The invention has the beneficial effects as follows:
Containing following trace element in the alloy billet that the present invention selects, wherein: carbon, yield-point and tensile strength is improved; Silicon, as reductive agent and reductor, can significantly improve the elastic limit of steel, yield-point and tensile strength, the combinations such as silicon and molybdenum, tungsten, chromium, are improved erosion resistance and oxidation resistant effect; Manganese is good reductor and sweetening agent, makes steel not only have enough toughness, and has higher intensity and hardness, improves the quenching property of steel, improves the hot workability of steel, improves wear resistance; Chromium, can significantly improve intensity, hardness and wear resistance, improves oxidation-resistance and the erosion resistance of steel; Nickel, improves the intensity of steel, keeps good plasticity and toughness, have higher corrosion resistance to soda acid, at high temperature have antirust and temperature capacity; Molybdenum, can make the grain refining of steel, improves hardening capacity and thermostrength, keeps enough intensity and creep resisting ability when high temperature, improves mechanical property; Titanium, is strong reductor, can makes the dense internal organization of steel, crystal grain thinning power, and reduce aging sensitivity and cold shortness, improving welding property, avoids intergranular corrosion; Tungsten, forming wolfram varbide with carbon has very high hardness and wear resistance; Niobium, niobium energy crystal grain thinning, reduce superheated susceptivity and the temper brittleness of steel, improve intensity, improving welding property, prevents intergranular corrosion phenomenon; Present invention process is simple, design science environmental protection, and these product performance are stablized, corrosion-resistant and high-temperature resistant, not easily aged deterioration, long service life.
Embodiment
embodiment 1
The present embodiment provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.11%, Ni:0.35%, Si:0.12%, Mn:0.67%, Ti:0.82%, Cr:2.21%, Nb:0.27%, W:0.71%, V:0.13%, Mo:0.13%, N:0.008%, P:0.002%, S:0.001%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 970 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 5:1;
The steel tube blank obtained is warming up to 1050 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 4 hours;
The steel tube blank completing carburizing is cooled to 550 DEG C and is incubated, soaking time is 5 hours, then with the speed of cooling of 6 DEG C/s by steel tube blank water-cooled to 280 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 810 DEG C, and be incubated 6 hours, then oil cooling to 460 DEG C, be incubated 2 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
embodiment 2
The present embodiment provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.13%, Ni:0.55%, Si:0.14%, Mn:0.69%, Ti:0.86%, Cr:2.25%, Nb:0.29%, W:0.73%, V:0.16%, Mo:0.15%, N:0.010%, P:0.004%, S:0.003%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 990 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 3:1;
The steel tube blank obtained is warming up to 1070 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 2 hours;
The steel tube blank completing carburizing is cooled to 590 DEG C and is incubated, soaking time is 3 hours, then with the speed of cooling of 8 DEG C/s by steel tube blank water-cooled to 340 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 830 DEG C, and be incubated 5 hours, then oil cooling to 520 DEG C, be incubated 1.5 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
embodiment 3
The present embodiment provides a kind of corrosion-resistant stainless steel transition pipeline and complete processing thereof, the weight percent chemical composition of selection steel blank is: C:0.12%, Ni:0.45%, Si:0.13%, Mn:0.68%, Ti:0.84%, Cr:2.23%, Nb:0.28%, W:0.72%, V:0.14%, Mo:0.14%, N:0.009%, P:0.003%, S:0.002%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 980 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 4:1;
The steel tube blank obtained is warming up to 1060 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 3 hours;
The steel tube blank completing carburizing is cooled to 570 DEG C and is incubated, soaking time is 4 hours, then with the speed of cooling of 7 DEG C/s by steel tube blank water-cooled to 310 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 820 DEG C, and be incubated 5.5 hours, then oil cooling to 490 DEG C, be incubated 1.8 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (4)
1. a corrosion-resistant stainless steel transition pipeline and complete processing thereof, it is characterized in that, the weight percent chemical composition of selection steel blank is: C:0.11-0.13%, Ni:0.35-0.55%, Si:0.12-0.14%, Mn:0.67-0.69%, Ti:0.82-0.86%, Cr:2.21-2.25%, Nb:0.27-0.29%, W:0.71-0.73%, V:0.13-0.16%, Mo:0.13-0.15%, N:0.008-0.010%, P:0.002-0.004%, S:0.001-0.003%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 970-990 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 5:1 to 3:1;
The steel tube blank obtained is warming up to 1050-1070 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 2-4 hour;
The steel tube blank completing carburizing is cooled to 550-590 DEG C and is incubated, soaking time is 3-5 hour, then with the speed of cooling of 6-8 DEG C/s by steel tube blank water-cooled to 280-340 DEG C, then by steel tube blank air cooling to room temperature;
Melted down by above-mentioned cooled steel tube blank and be heated to 810-830 DEG C, and be incubated 5-6 hour, then oil cooling is to 460-520 DEG C, insulation 1.5-2 hour, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
2. corrosion-resistant stainless steel transition pipeline according to claim 1 and complete processing thereof, it is characterized in that, the weight percent chemical composition of selection steel blank is: C:0.11%, Ni:0.35%, Si:0.12%, Mn:0.67%, Ti:0.82%, Cr:2.21%, Nb:0.27%, W:0.71%, V:0.13%, Mo:0.13%, N:0.008%, P:0.002%, S:0.001%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 970 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 5:1;
The steel tube blank obtained is warming up to 1050 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 4 hours;
The steel tube blank completing carburizing is cooled to 550 DEG C and is incubated, soaking time is 5 hours, then with the speed of cooling of 6 DEG C/s by steel tube blank water-cooled to 280 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 810 DEG C, and be incubated 6 hours, then oil cooling to 460 DEG C, be incubated 2 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
3. corrosion-resistant stainless steel transition pipeline according to claim 1 and complete processing thereof, it is characterized in that, the weight percent chemical composition of selection steel blank is: C:0.13%, Ni:0.55%, Si:0.14%, Mn:0.69%, Ti:0.86%, Cr:2.25%, Nb:0.29%, W:0.73%, V:0.16%, Mo:0.15%, N:0.010%, P:0.004%, S:0.003%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 990 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 3:1;
The steel tube blank obtained is warming up to 1070 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 2 hours;
The steel tube blank completing carburizing is cooled to 590 DEG C and is incubated, soaking time is 3 hours, then with the speed of cooling of 8 DEG C/s by steel tube blank water-cooled to 340 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 830 DEG C, and be incubated 5 hours, then oil cooling to 520 DEG C, be incubated 1.5 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
4. corrosion-resistant stainless steel transition pipeline according to claim 1 and complete processing thereof, it is characterized in that, the weight percent chemical composition of selection steel blank is: C:0.12%, Ni:0.45%, Si:0.13%, Mn:0.68%, Ti:0.84%, Cr:2.23%, Nb:0.28%, W:0.72%, V:0.14%, Mo:0.14%, N:0.009%, P:0.003%, S:0.002%, and all the other are Fe and inevitable impurity; Concrete steps are as follows:
Above-mentioned steel blank is placed in process furnace and is heated to 980 DEG C, then pass into methane and ethane, and be drawn into steel tube blank in closed environment, the content of methane and ethane is than being 4:1;
The steel tube blank obtained is warming up to 1060 DEG C, passes into kerosene and carry out carburizing treatment, the treatment time is 3 hours;
The steel tube blank completing carburizing is cooled to 570 DEG C and is incubated, soaking time is 4 hours, then with the speed of cooling of 7 DEG C/s by steel tube blank water-cooled to 310 DEG C, then by steel tube blank air cooling to room temperature;
Above-mentioned cooled steel tube blank is melted down and is heated to 820 DEG C, and be incubated 5.5 hours, then oil cooling to 490 DEG C, be incubated 1.8 hours, then air cooling is to room temperature;
Steel tube blank deburring after above-mentioned process is polished, and at its outer wall coating corrosion protection coating, dries warehouse-in.
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| CN201510195733.XA CN104789885A (en) | 2015-04-23 | 2015-04-23 | Corrosion-resistant stainless steel oil delivery pipe and processing technology thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106676389A (en) * | 2016-12-22 | 2017-05-17 | 苏州劲元油压机械有限公司 | High-strength corrosion-resistant steel for oil conveying pipe and processing technology thereof |
| CN107338397A (en) * | 2017-07-19 | 2017-11-10 | 浙江义腾特种钢管有限公司 | A kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology |
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