6061 t6 אלומיניום לעומת 7075 אֲלוּמִינְיוּם
6061 t6 אלומיניום לעומת 7075
סגסוגות אלומיניום 6061-T6 ו 7075 נמצאים בשימוש נרחב ביישומים הנדסיים, אבל יש להם מאפיינים שונים והם מתאימים למטרות שונות. להלן השוואה מפורטת של שתי הסגסוגות הללו מבחינת התכונות המכניות שלהן, תכונות פיזיקליות, ושימושים טיפוסיים:
השוואה בין 6061-T6 ו 7075 אֲלוּמִינְיוּם
| נֶכֶס | 6061-T6 אלומיניום | 7075 אֲלוּמִינְיוּם |
|---|
| הֶרכֵּב | 0.8-1.2% Mg, 0.4-0.8% ו, 0.15-0.4% Cu, 0.04-0.35% Cr | 5.1-6.1% Zn, 2.1-2.9% Mg, 1.2-2.0% Cu, 0.18-0.28% Cr |
| חוזק מתיחה | 310 MPa (45 ksi) | 572 MPa (83 ksi) |
| חוזק תשואה | 275 MPa (40 ksi) | 503 MPa (73 ksi) |
| התארכות בהפסקה | 12% | 11% |
| קַשִׁיוּת (ברינל) | 95 חֲצִי פֶּנסיוֹן | 150 חֲצִי פֶּנסיוֹן |
| Modulus of Elasticity | 68.9 GPa (10,000 ksi) | 71.7 GPa (10,400 ksi) |
| Density | 2.70 g/cm³ | 2.81 g/cm³ |
| Fatigue Strength | 96 MPa (14 ksi) | 159 MPa (23 ksi) |
| Thermal Conductivity | 167 W/m·K | 130 W/m·K |
| עמידות בפני קורוזיה | מְעוּלֶה | Fair to Poor (without protective coating) |
| רְתִיכוּת | מְעוּלֶה | Poor |
| יכולת עיבוד | טוֹב | Fair to Good |
| טיפול בחום | Heat treatable to T6 condition | Heat treatable to T6 or T73 condition |
Key Differences in Properties
- Strength:
- 7075 אֲלוּמִינְיוּם is much stronger, with a tensile strength of 572 MPa compared to 310 MPa for 6061-T6. This makes 7075 aluminum ideal for high-stress structural applications.
- עמידות בפני קורוזיה:
- 6061-T6 אלומיניום has excellent corrosion resistance, especially against atmospheric and marine conditions, while 7075 אֲלוּמִינְיוּם has fair to poor corrosion resistance and often requires a protective coating or anodizing for use in corrosive environments.
- רְתִיכוּת:
- 6061-T6 אלומיניום is highly weldable, making it suitable for structures requiring frequent welding. 7075 אֲלוּמִינְיוּם is difficult to weld and can suffer from cracking and brittleness after welding.
- יכולת עיבוד:
- 6061-T6 אלומיניום is known for its good machinability, which is better than that of 7075 אֲלוּמִינְיוּם, although 7075 still offers acceptable machinability for most applications.
- Density:
- 7075 אֲלוּמִינְיוּם is slightly denser (2.81 g/cm³) than 6061-T6 אלומיניום (2.70 g/cm³), which can affect weight-sensitive applications.
- Thermal Conductivity:
- 6061-T6 אלומיניום has better thermal conductivity (167 W/m·K) compared to 7075 אֲלוּמִינְיוּם (130 W/m·K), making it preferable for heat-exchange applications.
Comparison of Uses
| Application Area | 6061-T6 אלומיניום | 7075 אֲלוּמִינְיוּם |
|---|
| Aerospace | Aircraft fittings, fuel tanks, and fuselage structures | High-stress structural parts like aircraft wings, fuselage frames, and landing gear |
| Automotive | Chassis, wheel spacers, and engine components | Racing components like suspension parts, gears, and shafts |
| Marine | Boat hulls, masts, and marine fittings | Not typically used due to poor corrosion resistance |
| General Construction | Structural components, piping, ומסגרות | Not common; only when high strength is needed |
| Sports Equipment | מסגרות לאופניים, camping equipment, and scuba tanks | High-performance bicycle components, climbing equipment |
| Electronics | Heat sinks and electrical fittings | Not typically used; 6061 is preferred for thermal applications |
| Consumer Goods | Ladders, furniture, and household items | Premium products where high strength is desired, such as rugged outdoor gear |
Summary
- 6061-T6 אלומיניום is more versatile, easier to work with, and has excellent corrosion resistance, making it suitable for a wide range of applications, including marine, רכב, construction, and electronics.
- 7075 אֲלוּמִינְיוּם offers superior strength, making it ideal for high-stress applications like aerospace and high-performance sports equipment, but it has poorer weldability and corrosion resistance, limiting its use in certain environments.
