CN104651753A - Non-quenched and tempered steel for heavy truck balance shaft and manufacturing method thereof - Google Patents
Non-quenched and tempered steel for heavy truck balance shaft and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a non-quenched and tempered steel for a heavy truck balance shaft. The non-quenched and tempered steel is prepared from the following components in percentage by mass: C, Si, Mn, P, S, Cr, V, Ni, Cu, Mo, Ti, Alt, N, O, H, Sn, Sb, As, Pb and Fe. The invention also provides a preparation method of the non-quenched and tempered steel for the heavy truck balance shaft; the non-quenched and tempered steel is produced by virtue of smelting and refining, and reasonable heating, rolling control and cold control processes, and is excellent in properties: the tensile strength of the steel is 960-1000MPa, the yield strength of the steel is 700-750MPa, the elongation percentage of the yield is greater than or equal to 15%, the percentage reduction of area of the steel is greater than or equal to 40% and the longitudinal impact of the steel at the normal temperature of 20 DEG C is greater than or equal to 50J; in addition, the steel has an excellent toughness match, and is excellent in processability, high in forging technical adaptability and steady in performance.
Description
Technical field
The present invention relates to a kind of non-hardened and tempered steel and manufacture method thereof, be specifically related to one balancing shaft non-hardened and tempered steel and manufacture method thereof on heavy-duty car, belong to automobile manufacturing field.
Background technology
Balance shaft assembly is the main parts size on the equalizing-suspension device on two back axle series heavy-duty car, balance shaft support bears crossbeam, as point of suppon, axle housing is arranged on balance shaft support by bearing, can rotate around balance shaft support, leaf spring is arranged on axle housing by bolt, and rubber support grafting is passed through in one end of two axle housings in its two ends, there is no rigid fixing between leaf spring and axle housing, small wiping action can be done.The effect of balancing shaft can make tire tilt easily exactly, has significantly action, and does not affect other three cinctures tire, better absorbing vibration.
Current domestic commercial vehicle producer balancing shaft material generally adopts 42CrMo, balancing shaft cross section is large, adopt 42CrMo modifier treatment, martensitic stucture can only be obtained in top layer after quenching, top layer is only had to obtain the good tempered structure of obdurability after tempering, organize uneven along cross-sectional distribution, mechanical property and hardness are along cross section change greatly.And adopt mechanical property on non-hardened and tempered steel forging cross section to be substantially uniformly distributed, air cooling after forging, remove the thermal treatment (modifier treatment) of rough forging from, technique is simple, save the heat treated heating energy source of Quench and temper (forging Tempering and Quenching per ton will consume electric energy and be about 1000kWh according to statistics), save thermal treatment expense, reduce the energy consumption in production process and environmental pollution.
The tensile strength of domestic application the most successful F+P type non-hardened and tempered steel is lower than 1000MPa, and toughness is on the low side, is difficult to meet the requirements at the higher level of automotive light weight technology to steel obdurability.And the precedent that current domestic commercial vehicle producer balance shaft of heavy truck does not also have non-hardened and tempered steel to apply.
Summary of the invention
Technical problem to be solved by this invention is, for the shortcoming that above prior art exists, a kind of manufacture method of balance shaft of heavy truck non-hardened and tempered steel is proposed, the method is by the balance shaft of heavy truck non-hardened and tempered steel of reasonable component design, controlled rolling, Controlled cooling process acquisition excellent performance, operation is few and simple to operate, the non-hardened and tempered steel prepared has good obdurability, and excellent fatigue property, work-ing life is higher.
The technical scheme that the present invention solves above technical problem is:
A kind of balance shaft of heavy truck non-hardened and tempered steel, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.20 ~ 0.35%, Si:0.20 ~ 0.45%, Mn:1.50 ~ 2.30%, P≤0.010%, S≤0.080%, Cr:0.30 ~ 0.70%, V:0.05 ~ 0.30%, Ni≤0.30%, Cu≤0.20%, Mo≤0.20%, Ti≤0.035%, Alt:0.010 ~ 0.040%, N:0.008 ~ 0.020%, O≤0.0015%, H≤0.00010%, Sn≤0.010%, Sb≤0.010%, As≤0.015%, Pb≤0.010%, all the other are Fe.
The technical scheme that the present invention limits further is:
In aforementioned balance shaft of heavy truck non-hardened and tempered steel, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.20%, Si:0.45%, Mn:1.9%, P:0.010%, S:0.010%, Cr:0.70%, V:0.15%, Ni:0.30%, Cu:0.04%, Mo:0.20%, Ti:0.025%, Alt:0.040%, N:0.010%, O:0.0015%, H:0.00005%, Sn:0.010%, Sb:0.005%, As:0.015%, Pb:0.005%, all the other are Fe.
In aforementioned balance shaft of heavy truck non-hardened and tempered steel, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.35%, Si:0.20%, Mn:2.30%, P:0.008%, S:0.040%, Cr:0.30%, V:0.05%, Ni:0.20%, Cu:0.10%, Mo:0.10%, Ti:0.015%, Alt:0.010%, N:0.020%, O:0.0008%, H:0.00008%, Sn:0.008%, Sb:0.010%, As:0.010%, Pb:0.008%, all the other are Fe.
In aforementioned balance shaft of heavy truck non-hardened and tempered steel, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.24%, Si:0.32%, Mn:1.50%, P:0.005%, S:0.080%, Cr:0.50%, V:0.30%, Ni:0.15%, Cu:0.20%, Mo:0.08%, Ti:0.035%, Alt:0.025%, N:0.008%, O:0.0010%, H:0.00010%, Sn:0.009%, Sb:0.008%, As:0.008%, Pb:0.010%, all the other are Fe.
The present invention have also been devised a kind of preparation method of balance shaft of heavy truck non-hardened and tempered steel, and the flow process of this preparation method is batching → electrosmelting → LF refining → VD vacuum-treat → continuous casting, and concrete operation step is as follows:
(1) undertaken preparing burden by said components and batching is delivered to electric furnace and smelt, after smelting, adopt LF refining furnace to carry out refining, adopt during refining after feeding aluminum steel 1.5 ~ 2.2kg/t, LF refining and adopt VD to carry out vacuum-treat;
Before VD carries out vacuum-treat, the content of control Alt is at 0.015%-0.030%, Mn controls 1.85 ~ 2.00%, Cr controls 0.40 ~ 0.55%, during vacuum-treat, vacuum tightness is less than 1 millibar, hold-time is greater than 15 minutes, adjust N content when vacuum-treat and be greater than 100ppm, all compositions qualified rear quiet time of stirring is greater than 5 minutes;
(2) adopt the cast of continuous casting whole process protection to obtain steel billet, continuous casting controls tundish temperature at 1520-1535 DEG C, and maintenance superheating temperature is 20-25 DEG C, and permanent pulling rate degree is at 0.55-0.60m/min;
(3) steel billet is rolled, delivering to process furnace Heating temperature is 1180-1250 DEG C, heating 5.0-5.5h, and start rolling temperature is 1100-1150 DEG C, roughing finishing temperature control is below 1020 DEG C, cold bed under steel billet after rolling, below 930 DEG C, is quickly cooled to 689-697 DEG C, then enters to cheat slow cooling by steel billet by finish rolling finishing temperature control, entering to cheat temperature is 656-670 DEG C, insulation 24-25h, go out to cheat temperature 170-181 DEG C, last air cooling is to room temperature;
(4) mechanical workout is carried out to the cooled steel billet of rolling, aligning, group skin obtain work in-process, and carry out UT (Ultrasonic Testing) detection to work in-process, reject defective work in-process, carried out successively by qualified work in-process packing, identify, weigh, final warehouse-in is finished product.
The technical scheme that the present invention limits further is:
In the preparation method of aforementioned balance shaft of heavy truck non-hardened and tempered steel, in step (1) during electrosmelting strictly control P content below 0.010%, tapping temperature >=1610 DEG C of molten steel.
The invention has the beneficial effects as follows:
Chemical composition is one of key factor affecting continuously cast bloom internal soundness and high-strong toughness non-hardened and tempered steel, and the present invention obtains excellent over-all properties to make described steel, and limit the chemical composition of described steel, reason is:
C:C is one of the most effective strengthening element in non-hardened and tempered steel, is again the most cheap chemical element simultaneously, and improved the intensity of steel by gap solid solution, when carbon content is too low, intensity is low, and fatigue property not easily ensures; During too high levels, toughness will be deteriorated, and for improving the toughness of this non-hardened and tempered steel further, carbon content control of the present invention is 0.20 ~ 0.35%.
Si:Si energy significantly reinforced ferrite, has stronger solid solution strengthening effect.Si can increase again ferritic volume fraction in non-hardened and tempered steel, is conducive to improving toughness, but Si too high levels, will toughness and other processing performance of steel be reduced.Silicone content of the present invention controls 0.20 ~ 0.45%.
Mn:Mn promotes the raising of content of pearlite in alloy, replaces solution strengthening and refining grain size.In V microalloying non-hardened and tempered steel, Mn can strengthen the precipitation strength degree of V.Mn is also the important alloying element fixing S in each steel grade.Fe content of the present invention controls 1.50 ~ 2.30%.
Cr:Cr is medium carbide forming element, and a part forms alloyed cementite by displacement iron, and improve the stability of steel, a part dissolves in ferrite, produces solution strengthening, improves ferritic intensity and hardness.In the present invention, chromium content controls 0.30 ~ 0.70%
V:V and nitrogen have extremely strong avidity, so the advantageous effect of vanadium in steel is mainly present on matrix and crystal boundary with its nitride (VN) form, play the effect of precipitation strength and prevention grain growth.Titanium Composition Control of the present invention is 0.05 ~ 0.30%.
Al: aluminium is a kind of important deoxidant element, adds the aluminium of trace, effectively can reduce the inclusion content in steel in molten steel, and crystal grain thinning.Commonly use Al in Japan and form AlN suppression abnormal grain growth to solidify N.But too much aluminium, can promote that continuously cast bloom produces surface crack and reduces slab quality.Holo-Al content should control 0.010 ~ 0.040%.
S: middle low-carbon (LC) Sulfur Bearing Steel controls by smelting, controlled rolling, can obtain the sulfide of Dispersed precipitate, control proper can as second phase particles thinning microstructure, also can improve the machinability of round steel simultaneously.Sulphur content of the present invention controls 0.030 ~ 0.080%.
O too high levels in steel, the fatigue property of non-hardened and tempered steel described in meeting grievous injury, therefore Control for Oxygen Content is below 0.0015%.Some other inevitable impurity element such as H, Sn, Sb, As and Pb are controlled as: H≤0.00010%, Sn≤0.010%, Sb≤0.010%, As≤0.015%, Pb≤0.010%.
The present invention adopts electrosmelting+continuous casting to produce balance shaft of heavy truck non-hardened and tempered steel, adapts to numerous domestic and international steel enterprise and produces.With short production cycle, rhythm is fast, reduces production cost, improves production efficiency.
Non-hardened and tempered steel disclosed by the invention, can be used to alternative traditional Cr, Cr-Mo quenched and tempered steel manufacture cross section larger, higher automobile shafts like members is required to obdurability.This steel adopts higher Mn content, adds appropriate micro alloying element V, Al simultaneously, smelts flow process and increases N, then is aided with cooling controlling and rolling controlling process means acquisition polyphase structure, improves the obdurability of material.Application result shows, this steel has good obdurability coupling, and in forging process, this steel obtains uniform granular bainite microstructure within the scope of very wide cooling rate, and have excellent fatigue property, indices all reaches the design requirements of cargo truck simultaneously.Experimental data shows, this steel grade is compared with quenched and tempered steel 45#, 40Cr, 42CrMo and traditional Bainitic Steels 12Mn2VB, 16Mn2VB, and the automobile shafts like members of production is the highest for fatigue lifetime.
Non-hardened and tempered steel excellent property of the present invention, tensile strength is 960 ~ 1000MPa, yield strength is 700 ~ 750MPa, unit elongation is >=15%, relative reduction in area >=40%, 20 DEG C of low temperature impact of collision >=50J, there is good obdurability coupling, and the processing characteristics of excellence, forging process strong adaptability, performance is more steady.
Accompanying drawing explanation
Mechanical property when Fig. 1 is air cooling after differing temps forging.
Fig. 2 is a kind of 7 tons of vehicle differing materials balancing shaft fatigue tests contrast.
Embodiment
embodiment 1
The present embodiment provides a kind of balance shaft of heavy truck non-hardened and tempered steel, and this non-hardened and tempered steel comprises following composition by mass percentage: C:0.24%, Si:0.33%, Mn:1.96%, P:0.007%, S:0.039%, Cr:0.49%, V:0.12%, Ni:0.03%, Cu:0.04%, Mo:0.01%, Ti:0.012%, Alt:0.030%, N:0.014%, O:0.0015%, H:0.00005%, Sn:0.003%, Sb:0.002%, As:0.006%, Pb:0.005%, all the other are Fe.
The preparation method of above-mentioned balance shaft of heavy truck non-hardened and tempered steel, the flow process of this preparation method is batching → electrosmelting → LF refining → VD vacuum-treat → continuous casting, and concrete operation step is as follows:
(1) undertaken preparing burden by said components and batching is delivered to electric furnace and smelt, strict control P content is 0.008%, and the tapping temperature of molten steel is 1610 DEG C, adopts LF refining furnace to carry out refining after smelting, adopting during refining after feeding aluminum steel 1.9kg/t, LF refining adopts VD to carry out vacuum-treat;
Before VD carries out vacuum-treat, the content of control Alt controls 1.98% at 0.015%-0.030%, Mn, Cr controls 0.51%, vacuum tightness 0.5 millibar during vacuum-treat, hold-time is greater than 16 minutes, adjusts N content 122ppm when vacuum-treat, and all compositions are qualified quietly stirs 5 minutes time afterwards;
(2) adopt the cast of continuous casting whole process protection to obtain steel billet, continuous casting controls tundish temperature at 1535 DEG C, and keep superheating temperature to be 25 DEG C, permanent pulling rate degree is at 0.58m/min;
(3) steel billet is rolled, delivering to process furnace Heating temperature is 1180 DEG C, heating 5.5h, and start rolling temperature is 1132 DEG C, roughing finishing temperature control is at 1007 DEG C, cold bed under steel billet after rolling, at 927 DEG C, is quickly cooled to 697 DEG C, then enters to cheat slow cooling by steel billet by finish rolling finishing temperature control, entering to cheat temperature is 670 DEG C, insulation 25h, go out to cheat temperature 181 DEG C, last air cooling is to room temperature;
(4) mechanical workout is carried out to the cooled steel billet of rolling, aligning, group skin obtain work in-process, and carry out UT (Ultrasonic Testing) detection to work in-process, reject defective work in-process, carried out successively by qualified work in-process packing, identify, weigh, final warehouse-in is finished product.
The balance shaft of heavy truck non-hardened and tempered steel excellent property that the present invention prepares, tensile strength is 965MPa, yield strength is 711MPa, elongation is 17.1%, relative reduction in area 44.51%, 20 DEG C of low temperature impact of collision 55J, there is good obdurability coupling, have excellent processing characteristics, forging process strong adaptability, performance is more steady.Example As rolled is organized as bainite+ferrite+perlite, and after forging, tissue is based on bainite+ferrite.
embodiment 2
The present embodiment provides a kind of balance shaft of heavy truck non-hardened and tempered steel, and this non-hardened and tempered steel comprises following composition by mass percentage: C:0.24%, Si:0.32%, Mn:1.95%, P:0.007%, S:0.040%, Cr:0.51%, V:0.10%, Ni:0.04%, Cu:0.04%, Mo:0.01%, Ti:0.015%, Alt:0.021%, N:0.015%, O:0.0008%, H:0.00008%, Sn:0.002%, Sb:0.003%, As:0.003%, Pb:0.006%, all the other are Fe.
It is characterized in that: the flow process of this preparation method is batching → electrosmelting → LF refining → VD vacuum-treat → continuous casting, and concrete operation step is as follows:
(1) undertaken preparing burden by said components and batching is delivered to electric furnace and smelt, strict control P content is 0.009%, and the tapping temperature of molten steel 1650 DEG C, adopts LF refining furnace to carry out refining after smelting, adopting during refining after feeding aluminum steel 2.2kg/t, LF refining adopts VD to carry out vacuum-treat;
Before VD carries out vacuum-treat, the content of control Alt controls 2.00% at 0.015%-0.030%, Mn, Cr controls 0.49%, vacuum tightness 0.5 millibar during vacuum-treat, 17 minutes hold-times, adjust N content 130ppm when vacuum-treat, all compositions are qualified quietly stirs 5 minutes time afterwards;
(2) adopt the cast of continuous casting whole process protection to obtain steel billet, continuous casting controls tundish temperature at 1520 DEG C, and keep superheating temperature to be 25 DEG C, permanent pulling rate degree is at 0.58m/min;
(3) steel billet is rolled, delivering to process furnace Heating temperature is 1250 DEG C, heating 5.0h, and start rolling temperature is 1136 DEG C, roughing finishing temperature control is at 1011 DEG C, cold bed under steel billet after rolling, at 923 DEG C, is quickly cooled to 692 DEG C, then enters to cheat slow cooling by steel billet by finish rolling finishing temperature control, entering to cheat temperature is 663 DEG C, insulation 25h, go out to cheat temperature 170 DEG C, last air cooling is to room temperature;
(4) mechanical workout is carried out to the cooled steel billet of rolling, aligning, group skin obtain work in-process, and carry out UT (Ultrasonic Testing) detection to work in-process, reject defective work in-process, carried out successively by qualified work in-process packing, identify, weigh, final warehouse-in is finished product.
The balance shaft of heavy truck non-hardened and tempered steel excellent property that the present invention prepares, tensile strength is 973MPa, yield strength is 746MPa, elongation is 15.7%, relative reduction in area 47.64%, 20 DEG C of low temperature impact of collision 56J, there is good obdurability coupling, have excellent processing characteristics, forging process strong adaptability, performance is more steady.Example As rolled is organized as bainite+ferrite+perlite, and after forging, tissue is based on bainite+ferrite.
embodiment 3
The present embodiment provides a kind of balance shaft of heavy truck non-hardened and tempered steel, and this non-hardened and tempered steel comprises following composition by mass percentage: C:0.24%, Si:0.31%, Mn:2.00%, P:0.005%, S:0.036%, Cr:0.50%, V:0.12%, Ni:0.06%, Cu:0.03%, Mo:0.08%, Ti:0.015%, Alt:0.023%, N:0.014%, O:0.0010%, H:0.00010%, Sn:0.006%, Sb:0.002%, As:0.006%, Pb:0.005%, all the other are Fe.
It is characterized in that: the flow process of this preparation method is batching → electrosmelting → LF refining → VD vacuum-treat → continuous casting, and concrete operation step is as follows:
(1) undertaken preparing burden by said components and batching is delivered to electric furnace and smelt, adopt LF refining furnace to carry out refining after smelting, strictly control P content is 0.007%, the tapping temperature of molten steel 1620 DEG C, adopting during refining after feeding aluminum steel 1.5kg/t, LF refining adopts VD to carry out vacuum-treat;
Before VD carries out vacuum-treat, the content of control Alt controls 1.96% at 0.015%-0.030%, Mn, Cr controls 0.55%, vacuum tightness 0.5 millibar during vacuum-treat, hold-time is greater than 16 minutes, adjusts N content be greater than 120ppm when vacuum-treat, and all compositions are qualified quietly stirs 6 minutes time afterwards;
(2) adopt the cast of continuous casting whole process protection to obtain steel billet, continuous casting controls tundish temperature at 1528 DEG C, and keep superheating temperature to be 25 DEG C, permanent pulling rate degree is at 0.58m/min;
(3) steel billet is rolled, delivering to process furnace Heating temperature is 1200 DEG C, heating 5.2h, and start rolling temperature is 1130 DEG C, roughing finishing temperature control is at 1009 DEG C, cold bed under steel billet after rolling, at 917 DEG C, is quickly cooled to 689 DEG C, then enters to cheat slow cooling by steel billet by finish rolling finishing temperature control, entering to cheat temperature is 656 DEG C, insulation 24h, go out to cheat temperature 173 DEG C, last air cooling is to room temperature;
(4) mechanical workout is carried out to the cooled steel billet of rolling, aligning, group skin obtain work in-process, and carry out UT (Ultrasonic Testing) detection to work in-process, reject defective work in-process, carried out successively by qualified work in-process packing, identify, weigh, final warehouse-in is finished product.
The balance shaft of heavy truck non-hardened and tempered steel excellent property that the present invention prepares, tensile strength is 991MPa, yield strength is 729MPa, elongation is 15.6%, relative reduction in area 42.77%, 20 DEG C of low temperature impact of collision 54J, there is good obdurability coupling, have excellent processing characteristics, forging process strong adaptability, performance is more steady.Example As rolled is organized as bainite+ferrite+perlite, and after forging, tissue is based on bainite+ferrite.
In this non-hardened and tempered steel air cooling situation, the mechanical property after differing temps forging is summarized in Fig. 1.A kind of 7 tons of vehicle balancing shafves adopt 45#, 42CrMo, 16Mn2VB and non-hardened and tempered steel of the present invention to manufacture, and its fatigue test results is shown in Fig. 2, and visible anti-fatigue performance of the present invention is good.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. a balance shaft of heavy truck non-hardened and tempered steel, it is characterized in that, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.20 ~ 0.35%, Si:0.20 ~ 0.45%, Mn:1.50 ~ 2.30%, P≤0.010%, S≤0.080%, Cr:0.30 ~ 0.70%, V:0.05 ~ 0.30%, Ni≤0.30%, Cu≤0.20%, Mo≤0.20%, Ti≤0.035%, Alt:0.010 ~ 0.040%, N:0.008 ~ 0.020%, O≤0.0015%, H≤0.00010%, Sn≤0.010%, Sb≤0.010%, As≤0.015%, Pb≤0.010%, all the other are Fe.
2. balance shaft of heavy truck non-hardened and tempered steel according to claim 1, is characterized in that, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.20%, Si:0.45%, Mn:1.9%, P:0.010%, S:0.010%, Cr:0.70%, V:0.15%, Ni:0.30%, Cu:0.04%, Mo:0.20%, Ti:0.025%, Alt:0.040%, N:0.010%, O:0.0015%, H:0.00005%, Sn:0.010%, Sb:0.005%, As:0.015%, Pb:0.005%, all the other are Fe.
3. balance shaft of heavy truck non-hardened and tempered steel according to claim 1, is characterized in that, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.35%, Si:0.20%, Mn:2.30%, P:0.008%, S:0.040%, Cr:0.30%, V:0.05%, Ni:0.20%, Cu:0.10%, Mo:0.10%, Ti:0.015%, Alt:0.010%, N:0.020%, O:0.0008%, H:0.00008%, Sn:0.008%, Sb:0.010%, As:0.010%, Pb:0.008%, all the other are Fe.
4. balance shaft of heavy truck non-hardened and tempered steel according to claim 1, is characterized in that, this non-hardened and tempered steel comprises following composition by mass percentage: C:0.24%, Si:0.32%, Mn:1.50%, P:0.005%, S:0.080%, Cr:0.50%, V:0.30%, Ni:0.15%, Cu:0.20%, Mo:0.08%, Ti:0.035%, Alt:0.025%, N:0.008%, O:0.0010%, H:0.00010%, Sn:0.009%, Sb:0.008%, As:0.008%, Pb:0.010%, all the other are Fe.
5. the preparation method of balance shaft of heavy truck non-hardened and tempered steel according to claim arbitrary in claim 1-4, is characterized in that: the flow process of this preparation method is batching → electrosmelting → LF refining → VD vacuum-treat → continuous casting, and concrete operation step is as follows:
(1) undertaken preparing burden by said components and batching is delivered to electric furnace and smelt, after smelting, adopt LF refining furnace to carry out refining, adopt during refining and feed aluminum steel 1.5 ~ 2.2kg/t, after refining, adopt VD to carry out vacuum-treat;
Before VD carries out vacuum-treat, the content of control Alt is at 0.015%-0.030%, Mn controls 1.850 ~ 2.000%, Cr controls 0.400 ~ 0.550%, during vacuum-treat, vacuum tightness is less than 1 millibar, hold-time is greater than 15 minutes, adjust N content when vacuum-treat and be greater than 100ppm, all compositions qualified rear quiet time of stirring is greater than 5 minutes;
(2) adopt the cast of continuous casting whole process protection to obtain steel billet, continuous casting controls tundish temperature at 1520-1535 DEG C, and maintenance superheating temperature is 20-25 DEG C, and permanent pulling rate degree is at 0.55-0.60m/min;
(3) steel billet is rolled, delivering to process furnace Heating temperature is 1180-1250 DEG C, heating 5.0-5.5h, and start rolling temperature is 1100-1150 DEG C, roughing finishing temperature control is below 1020 DEG C, cold bed under steel billet after rolling, below 930 DEG C, is quickly cooled to 689-697 DEG C, then enters to cheat slow cooling by steel billet by finish rolling finishing temperature control, entering to cheat temperature is 656-670 DEG C, insulation 24-25h, go out to cheat temperature 170-181 DEG C, last air cooling is to room temperature;
(4) mechanical workout is carried out to the cooled steel billet of rolling, aligning, group skin obtain work in-process, and carry out UT (Ultrasonic Testing) detection to work in-process, reject defective work in-process, carried out successively by qualified work in-process packing, identify, weigh, final warehouse-in is finished product.
6. the preparation method of balance shaft of heavy truck non-hardened and tempered steel according to claim 5, is characterized in that: in step (1) during electrosmelting strictly control P content below 0.010%, tapping temperature >=1610 DEG C of molten steel.
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| CN113373370A (en) * | 2020-03-10 | 2021-09-10 | 宝山钢铁股份有限公司 | 1100 MPa-level axle housing steel and manufacturing method thereof |
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| CN114941111A (en) * | 2022-06-22 | 2022-08-26 | 江苏沙钢集团淮钢特钢股份有限公司 | Low-carbon non-quenched and tempered steel for automobile control arm and preparation method thereof |
| WO2023014331A3 (en) * | 2021-08-04 | 2023-03-02 | Ti̇rsan Kardan Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Next-generation micro-alloyed steel |
| CN115747639A (en) * | 2022-10-28 | 2023-03-07 | 中国第一汽车股份有限公司 | Bainite non-quenched and tempered steel material, steering knuckle and preparation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317244A (en) * | 1989-06-14 | 1991-01-25 | Kobe Steel Ltd | High strength hot rolled steel plate high having excellent workability and weldability and its manufacture |
| CN102418047A (en) * | 2011-11-16 | 2012-04-18 | 莱芜钢铁集团有限公司 | Non-quenched and tempered fatigue-resistant steel plate and manufacturing method thereof |
| CN102912234A (en) * | 2012-11-05 | 2013-02-06 | 南京钢铁股份有限公司 | Manufacturing method for strain ageing resistant E36 level large thickness ship plate steel |
| JP2013032592A (en) * | 2006-02-01 | 2013-02-14 | Bharat Heavy Electricals Ltd | ADDITION OF NIOBIUM TO Cr-Mo-1/4V STEEL CASTING FOR STEAM TURBINE CASING |
| CN103266287A (en) * | 2013-05-14 | 2013-08-28 | 莱芜钢铁集团有限公司 | Medium-carbon ferrite-pearlite non-quenched and tempered steel and manufacturing method thereof |
| CN103589970A (en) * | 2013-10-24 | 2014-02-19 | 南京钢铁股份有限公司 | Bar material for non-quenched and tempered shaft part and manufacturing process of bar material |
-
2014
- 2014-11-28 CN CN201410713774.9A patent/CN104651753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317244A (en) * | 1989-06-14 | 1991-01-25 | Kobe Steel Ltd | High strength hot rolled steel plate high having excellent workability and weldability and its manufacture |
| JP2013032592A (en) * | 2006-02-01 | 2013-02-14 | Bharat Heavy Electricals Ltd | ADDITION OF NIOBIUM TO Cr-Mo-1/4V STEEL CASTING FOR STEAM TURBINE CASING |
| CN102418047A (en) * | 2011-11-16 | 2012-04-18 | 莱芜钢铁集团有限公司 | Non-quenched and tempered fatigue-resistant steel plate and manufacturing method thereof |
| CN102912234A (en) * | 2012-11-05 | 2013-02-06 | 南京钢铁股份有限公司 | Manufacturing method for strain ageing resistant E36 level large thickness ship plate steel |
| CN103266287A (en) * | 2013-05-14 | 2013-08-28 | 莱芜钢铁集团有限公司 | Medium-carbon ferrite-pearlite non-quenched and tempered steel and manufacturing method thereof |
| CN103589970A (en) * | 2013-10-24 | 2014-02-19 | 南京钢铁股份有限公司 | Bar material for non-quenched and tempered shaft part and manufacturing process of bar material |
Non-Patent Citations (1)
| Title |
|---|
| 朱志强等: "《钢分析化学与物理检测》", 30 June 2013, 冶金工业出版社 * |
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