CN1557667A - Steering knuckle - Google Patents
Steering knuckle Download PDFInfo
- Publication number
- CN1557667A CN1557667A CNA2004100126699A CN200410012669A CN1557667A CN 1557667 A CN1557667 A CN 1557667A CN A2004100126699 A CNA2004100126699 A CN A2004100126699A CN 200410012669 A CN200410012669 A CN 200410012669A CN 1557667 A CN1557667 A CN 1557667A
- Authority
- CN
- China
- Prior art keywords
- tempered steel
- hardened
- steering knuckle
- quenching
- tempered
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a steering knuckle, which is characterized in that: the material of the steering knuckle is medium carbon pearlite-ferrite non-quenched and tempered steel. The steering knuckle made of the non-quenched and tempered steel avoids the quenching and tempering heat treatment process, and reduces the production cost; no quenching crack and deformation; the size effect is small, the cross section performance of the part is uniform, and the process defects and waste products existing in quenching and tempering are avoided; the energy consumption is low, the environmental pollution is reduced, the cutting performance is good, and the service life of the cutter is prolonged.
Description
Technical field: the invention belongs to the automotive material application, relate to a kind of steering swivel.
Background technology: the important load-carrying element on the automobile, to make through modulation heat treatment to common medium-carbon steel or medium carbon alloy steels of adopting such as fasteners from axle class, component of rod category, general this type of part of Medium Truck has tens of kinds approximately, and weight reaches hundreds of kilograms.The tempered sorbite tissue that obtains of modulation heat treatment has the good fit of intensity and plasticity, toughness, automobile front axle, semiaxis, castellated shaft, steering swivel, and part such as engine crankshaft, connecting rod and most of fastener are used this technology manufacturing always.Though but the modulation heat-treatment part has good comprehensive mechanical properties, in heat tracing and quenching quenching process, may produce Technology for Heating Processing defective and waste product, as oxidation and decarbonization, distortion, quench crack etc.; And modified hot-cured energy consumption is big, contaminated environment.Though the high-ductility index of modified part can prevent the unexpected generation of part brittle failure accident in use, and machinability is brought totally unfavorable influence, it is low to be embodied in cutter life, and the part processing degree of finish is poor.
Summary of the invention: the present invention exists defective workmanship and waste product for the modified heat treatment step that solves the employing of conventional steering restraining fabrication technique, and energy consumption is big, contaminated environment, be unfavorable for the problem of cutting, propose a kind of steering swivel, it is characterized in that: the material of described steering swivel is middle carbon pearlitic matrix-double carbide non-hardened and tempered steel.Adopt this non-hardened and tempered steel to make steering swivel and exempted modified heat treatment step, reduced productive costs; No quench crack and distortion; Dimensional effect is little, and the part cross-section performance is even, defective workmanship and the waste product of having avoided modifier treatment to exist; Energy consumption is little, has reduced environmental pollution, has good cutting ability, has prolonged cutter life.
The specific embodiment: non-hardened and tempered steel is a class new steel grade that abroad grows up in the seventies, be in middle low carbon steel, to add micro-strong carbide forming element, as elements such as vanadium, niobium, titaniums, high temperature deformation in the utilization forging operation of rolling and cooling subsequently, control microalloying compound separate out and produce the grain refinement effect, thereby steel is strengthened.Because this class steel has been exempted modified heat treatment process in process of production, and mechanical property can reach the modified level of middle low carbon steel, so be called non-hardened and tempered steel.And the carbon non-hardened and tempered steel only is used for non-security personnel's part in the past.The present invention is that carbon pearlite-ferrite non-hardened and tempered steel is as the raw MAT'L of making steering swivel in adopting, and carbon pearlite-ferrite non-hardened and tempered steel is 35MnV, 40MnV, 40MnV (Ti), serial non-hardened and tempered steels such as 45V, 48MnV in this.With the steering swivel of this raw MAT'L processing, behind mid-frequency induction hardening, the finished part superficial hardness reaches 52～63HRC; Surface hardening after cure layer depth reaches 3～6mm; The metallographic structure of surface hardening layer reaches the requirement of EQB5-73,3～6 grades of martensite levels.
Further specify the present invention below in conjunction with concrete observed data:
One, middle carbon pearlite-ferrite non-hardened and tempered steel and tempered steel mechanical property contrast:
Adopting non-hardened and tempered steel 48MnV is raw-material Φ 20mm sample blank, through 950 ℃ of heating, is incubated 30 minutes, air cooling; Mechanical property with the 40MnB modifier treatment compares then: the φ 20mm coupon of 40MnB is through 850 ℃ of heating, insulation-No. 20 quenching press oil quench-550 ℃ tempering in 60 minutes, 180 minutes-air cooling of insulation.Test results sees Table 1:
Table 1 non-hardened and tempered steel 48MnV and the contrast of 40MnB mechanical property
| Material mark | Yield strength MPa | Draw intensity σ bMPa | Stretch ratio δ 5％ | Percent reduction of area % | Hit toughness a kJ/cm 2 |
| ??48MmV (1) | ????541 | ????879 | ????22.0 | ????53.8 | ????57.5 |
| 40MnB is modified (2) | ????- | ????920 | ????19.8 | ????60.6 | ????128 |
As can be seen from the above table, the dynamic ductility of middle carbon pearlite-ferrite non-hardened and tempered steel is more much lower than tempered steel, thereby makes cutting ability be better than tempered steel, has prolonged cutter life.
Two, middle carbon pearlite-ferrite non-hardened and tempered steel and tempered steel induction hardening performance comparison:
Adopting non-hardened and tempered steel 48MnV is ℃ heating of raw-material φ 39mm coupon-1200, insulation 40min-air cooling-induction hardening; Adopt ℃ heating of φ 39 coupons-820 ,-610 ℃ of tempering of insulation 40min-circulating water quenching of 40MnB material, insulation 40min, bulk storage air cooling-induction hardening.
Then the two performance is compared, test results sees Table 2, and wherein test figures is taked aviation value:
Table 2 non-hardened and tempered steel 48MnV and 40MnB induction hardening performance
| Material and heat treatment | Superficial hardness (HRC) | Depth of hardening (mm) | The original structure grain size |
| ??48MnV | ????61.4 | ????4.53 | ????4.0 |
| 40MnB is modified | ????55.8 | ????4.08 | ????- |
As can be seen from Table 2, middle carbon pearlite-ferrite non-hardened and tempered steel superficial hardness height, the quenching layer depth can not exist quench crack and distortion, and dimensional effect is little, and the part cross-section performance is even; And tempered steel causes quench crack and distortion easily for complex parts; Dimensional effect is big, for large-scale part, can't through hardening, and having only the top layer is quenched and tempered organization.
Three, the contrast test of middle carbon pearlite-ferrite non-hardened and tempered steel and tempered steel steering swivel fatigue life:
Non-hardened and tempered steel 48MnV steering swivel and 40MnB steering swivel side direction are loaded, test its side direction and load fatigue life, the results are shown in Table 3:
Table 3 non-hardened and tempered steel 48MnV and 40MnB steering swivel side direction load fatigue life
| Material | The load explanation | Life-span |
| 48MnV | Loading force is the sinusoidal waveform reverse load, and size is ± 7.245KN. | Do not split for 1,000,000 times |
| 40MnB is modified | Do not split for 1,000,000 times |
As can be seen from Table 3, the fatigue life of middle carbon pearlite-ferrite non-hardened and tempered steel is suitable with the fatigue life of tempered steel, the processing of the part that can be used to fully to ensure public security.
Four, concrete steel grade performance is analyzed in the centering carbon pearlite-ferrite non-hardened and tempered steel:
Select 35MnV Φ 75mm stocking for use; 40MnV Φ 60mm stocking; 40MnV (Ti) Φ 60-85mm stocking; 48MnV Φ 20mm sample blank through 950 ℃ of heating, is incubated 30 minutes, and the performance behind the air cooling is analyzed.
Concrete test results see Table 4 several in three-point bending fatigue property contrast behind the mid-frequency induction hardening of carbon non-hardened and tempered steels among the mechanical property contrast of carbon non-hardened and tempered steels and table 5 several:
The mechanical property of carbon non-hardened and tempered steel during table 4 is several
| Material mark | Yield strength MPa | Tensile strength sigma b??MPa | Stretch ratio δ 5??％ | Percent reduction of area ψ % | Dynamic ductility a k????J/cm 2 |
| ??35MnV | ??527～662 | ??790～1000 | ??15～23 | ????41～62 | ????45～90 |
| ??40MnV | ??529～548 | ??813～833 | ??16～18 | ????45～46 | ????50～55 |
| ??40MnV(Ti) | ??510～588 | ??793～865 | ??18.2～23.5 | ????44～56.3 | ????56～88 |
| ??45V | ??534.1～515.5 | ??725.2～744.8 | ??19.3～20.1 | ????48.5～49.5 | ????54.9～58.8 |
| ??48MnV | ??541 | ??879 | ??22.0 | ????53.8 | ????57.5 |
Three-point bending fatigue property behind the carbon non-hardened and tempered steel mid-frequency induction hardening during table 5 is several
| Material and Technology for Heating Processing | Load (KN) | Life-span (ten thousand times) | Failure mode |
| 40MnB is modified | ????10～110 | ????300.8 | Surmount |
| ????41.6 | The middle part is split | ||
| ????301.0 | Surmount | ||
| The 48MnV air cooling | ????10～110 | ????125.5 | The middle part is split |
| ????95.8 | The middle part is disconnected | ||
| ????78.9 | The middle part is split | ||
| ????59.9 | The middle part is split | ||
| The 40MnV air cooling | ????10～110 | ????110.8 | The middle part is split |
| ????187.6 | The middle part is split | ||
| ????84.3 | The middle part is disconnected | ||
| ????157.9 | The middle part is disconnected | ||
| The 40MnV blast-cold | ????10～110 | ????128.3 | The middle part is split |
| ????109.5 | The middle part is split | ||
| ????148.1 | The middle part is split | ||
| ????145.1 | The middle part is split | ||
| The 40MnV stocking | ????10～110 | ????243.4 | The middle part is split |
| ????300.0 | Surmount | ||
| ????302.9 | Surmount |
By the explanation of above-mentioned test figures, the carbon non-hardened and tempered steel is all applicable to the processing of spindle among 35MnV, 40MnV, 40MnV (Ti), 45V, the 48MnV etc.
In sum, middle carbon pearlite-ferrite non-hardened and tempered steel has been exempted modified heat treatment step, and energy-conservation, every kg of material economize on electricity 1 degree; No quench crack and distortion; Dimensional effect is little, and the part cross-section performance is even; Excellent cutting performance, cutter life is long.The power consumption that has overcome tempered steel is big, modified power consumption 1 degree that needs of every kg of material; Cause quench crack and distortion easily for complex parts; Dimensional effect is big, for large-scale part, can't through hardening, and having only the top layer is quenched and tempered organization; The deficiency of material cutting ability difference.Non-modified flexural fatigue performance of carbon pearlite-ferrite and tempered steel is suitable even more excellent simultaneously, the processing of the steering swivel of part so complete alternative tempered steel is used to ensure public security.
Claims (2)
1, a kind of steering swivel is characterized in that: the material of described steering swivel is middle carbon pearlite-ferrite non-hardened and tempered steel.
2, steering swivel as claimed in claim 1 is characterized in that: carbon pearlite-ferrite non-hardened and tempered steel is the 48MnV non-hardened and tempered steel in described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100126699A CN1557667A (en) | 2004-01-14 | 2004-01-14 | Steering knuckle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100126699A CN1557667A (en) | 2004-01-14 | 2004-01-14 | Steering knuckle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1557667A true CN1557667A (en) | 2004-12-29 |
Family
ID=34351019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100126699A Pending CN1557667A (en) | 2004-01-14 | 2004-01-14 | Steering knuckle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1557667A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572026A (en) * | 2012-07-26 | 2014-02-12 | 广东省韶铸集团有限公司 | Rapid quenching and tempering method of steering knuckle casted by using low-carbon low-alloy steel |
| CN103975080A (en) * | 2011-10-07 | 2014-08-06 | 巴巴萨海布·尼尔康德·卡利亚尼 | A process to improve fatigue strength of micro alloy steels, forged parts made from the process and an apparatus to execute the process |
-
2004
- 2004-01-14 CN CNA2004100126699A patent/CN1557667A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975080A (en) * | 2011-10-07 | 2014-08-06 | 巴巴萨海布·尼尔康德·卡利亚尼 | A process to improve fatigue strength of micro alloy steels, forged parts made from the process and an apparatus to execute the process |
| CN103572026A (en) * | 2012-07-26 | 2014-02-12 | 广东省韶铸集团有限公司 | Rapid quenching and tempering method of steering knuckle casted by using low-carbon low-alloy steel |
| CN103572026B (en) * | 2012-07-26 | 2015-11-04 | 广东省韶铸集团有限公司 | The fast hardening and tempering treatment process of low-carbon low-alloy steel casting steering knuckle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102252024B (en) | Steel ball special for third-age hub bearing for luxury cars | |
| CN101574769B (en) | Surface treatment method of piston for quartering hammer | |
| CN1467121A (en) | Track link production method and track link produced by the same | |
| CN104191173B (en) | A kind of high-end rail milling train roll production technique | |
| CN101868556A (en) | Heat-treatment process for a steel | |
| CN102199731A (en) | Composite microalloyed large-section non-quenched and tempered steel | |
| CN106811580A (en) | A kind of annealing process of H13 hot die steels | |
| CN112063823B (en) | Alloy steel high-speed rail axle and production method thereof | |
| CN101638791A (en) | Heat treatment process for driving and driven bevel gear of drive axle | |
| CN1131116C (en) | Method for producing steel component | |
| CN1287183A (en) | Bearing steel suitable for the working condition of heavy load and great shock and its heat treatment process | |
| CN111876561B (en) | Low-temperature secondary hardening tempering method for gradient-deformed high-carbon martensitic stainless steel | |
| CN113564496A (en) | Long-life railway bearing steel and preparation method thereof | |
| CN1730703A (en) | Nontempered carbon structural steel and its production method | |
| CN1031467C (en) | Renovating process for waste or old roll | |
| CN1557667A (en) | Steering knuckle | |
| CN115058656B (en) | Tyre for elastic wheel serving in cold environment and heat treatment process thereof | |
| CN116144909A (en) | Non-quenched and tempered steel motor shaft and preparation method and application thereof | |
| CN1810997A (en) | Heat treatment process for raising comprehensive performace of low alloy structure steel | |
| CN1107736C (en) | Stentor cemented steel for gear and thermal working technology | |
| CN112176152B (en) | High-speed rail axle with long fatigue life and speed per hour more than or equal to 400 kilometers and laser quenching method thereof | |
| CN111471938B (en) | Carbide bainite-free steel for electric automobile gear and production method thereof | |
| CN112176255B (en) | Carbon steel high-speed rail axle with speed per hour being more than or equal to 400 kilometers and modification method thereof | |
| CN114990450B (en) | Wheel rim for high-wear-resistance elastic wheel and heat treatment process thereof | |
| CN111471929B (en) | Carbide bainite-free steel for quality-adjustment-free gear and production method 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |