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Innehållsförteckning

If you’re in the engineering, marine, or heavy machinery industry, you’ve probably come across the name QAl9Mn2. This incredibly versatile aluminum bronze alloy is known for its exceptional styrka, korrosionsbeständighet, och wear resistance, making it a popular choice for applications that demand durability and reliability. But what exactly is QAl9Mn2, and why is it so highly valued?

In this comprehensive guide, we’ll explore everything you need to know about QAl9Mn2. From its sammansättning to its applications, we’ll break down the alloy’s key features and specifications, provide insights into its pros and cons, and compare it to other similar materials. Whether you’re a design engineer looking to source materials for a new project or simply curious about the properties of QAl9Mn2, this article has you covered.

Översikt

QAl9Mn2 is an aluminum bronze alloy, primarily composed of copper, aluminum, and a small percentage of manganese. The alloy is often referred to as aluminum manganese bronze because of its specific alloying elements. The numbers in QAl9Mn2 stand for 9% aluminum och 2% manganese, with the remainder being copper and trace elements.

Why Choose QAl9Mn2?

  • Styrka: This alloy is known for its high mechanical strength, making it ideal for demanding applications.
  • Motståndskraft mot korrosion: QAl9Mn2 offers excellent resistance to corrosion, particularly in marine environments where exposure to seawater is a concern.
  • Slitstyrka: Its superior wear resistance makes it suitable for parts that experience heavy friction and stress.
  • Bearbetbarhet: Although QAl9Mn2 is harder than standard copper alloys, it still maintains decent machinability, making it a versatile material for various manufacturing processes.

In short, QAl9Mn2 is a workhorse alloy that offers a great balance between styrka, durability, och korrosionsbeständighet, making it a favored choice in industries like marine engineering, flyg- och rymdindustrin, och heavy machinery.


Sammansättning och egenskaper

Every material’s performance is dictated by its composition. Let’s take a closer look at what makes QAl9Mn2 a standout alloy.

Sammansättning

ElementProcentuell andel (%)
Koppar (Cu)88 – 90
Aluminium (Al)8.5 – 9.5
Mangan (Mn)1.5 – 2.5
Järn (Fe)≤ 1.0
Nickel (Ni)≤ 0.5
Kisel (Si)≤ 0.1
Zink (Zn)≤ 0.1
Bly (Pb)≤ 0.05

What Does Each Element Bring to the Table?

  • Koppar (Cu): The base element, providing ductility, värmeledningsförmåga, och korrosionsbeständighet.
  • Aluminium (Al): Improves styrka, hardness, and significantly boosts corrosion resistance.
  • Mangan (Mn): Enhances styrka och wear resistance while also contributing to the alloy’s ability to withstand high stress.
  • Järn (Fe): Adds to the structural integrity, increasing hardness och wear resistance.
  • Nickel (Ni): Improves the overall toughness och resistance to corrosion.
  • Trace Elements: Silicon, zinc, and lead are present in very small amounts to refine the alloy’s properties and machinability.

Mechanical and Physical Properties

The following table outlines the key mekanisk och physical properties av QAl9Mn2 based on typical standards.

FastighetTypiskt värde
Draghållfasthet500 – 700 MPa
Utbyteshållfasthet250 – 400 MPa
Töjning10 – 20%
Hardness (HB)130 – 180 HB
Täthet7.6 – 7.8 g/cm³
Termisk konduktivitet50 – 60 W/m·K
Elektrisk konduktivitet~10 – 15% IACS
Smältpunkt1030°C – 1060°C
Coefficient of Expansion18 x 10⁻⁶/°C

What Do These Properties Mean for You?

  • Draghållfasthet: High tensile strength makes QAl9Mn2 suitable for heavy-duty parts that experience high loads.
  • Utbyteshållfasthet: The alloy won’t deform easily, making it perfect for structural applications.
  • Hårdhet: Its moderate to high hardness ensures good wear resistance, critical in applications with friction eller abrasion.
  • Motståndskraft mot korrosion: The aluminum och manganese content offer excellent protection against seawater corrosion, making it ideal for marine components.

Vanliga tillämpningar

You might be wondering, where exactly is QAl9Mn2 used? Due to its hög hållfasthet, wear resistance, och korrosionsbeständighet, this alloy finds its way into a variety of industries and applications.

Typiska användningsområden

IndustriVanliga tillämpningar
Marin teknikPropellers, shafts, rudder components, seawater pumps
Flyg- och rymdindustrinLanding gear bushings, structural components
Olja och gasValve components, connectors, wear-resistant bushings
Heavy MachineryBearing cages, gears, guide rails, wear plates
KonstruktionSliding components, couplings, hydraulic cylinder parts
FordonGear bushings, engine components, valve guides

Why QAl9Mn2 Works in These Applications

  • Marina tillämpningar: The korrosionsbeständighet av QAl9Mn2 makes it perfect for parts like propellers och shafts that are exposed to seawater och marine environments.
  • Flyg- och rymdindustrin: In the aerospace industry, the alloy’s hög hållfasthet och toughness make it ideal for landing gear bushings and other high-stress components.
  • Heavy Machinery: For bearings, gears, och guide rails, QAl9Mn2 is a go-to material due to its ability to withstand high friction och wear.

Specifikationer, storlekar och standarder

När du väljer QAl9Mn2 for your project, it’s crucial to understand the grades, sizes, och standards available. This section will help guide you through the available options.

Specifikationer

SpecifikationDetaljer
Available FormsRods, plates, bars, tubes
Diameter Range (Rods)10 mm to 300 mm
Thickness Range (Plates)2 mm to 100 mm
Length (Bars)Up to 6 meters
TemperAnnealed, cold-worked
StandarderGB/T 5231-2012, ASTM B148, DIN 1705

Betyg

BetygEgenskaper
QAl9Mn2-Soft (Annealed)More ductile, easier to machine
QAl9Mn2-Hard (Cold-Worked)Increased strength and hardness, better wear resistance

Choosing the Right Grade

  • Soft (Annealed): Suitable for applications that require greater formability och machinability.
  • Hard (Cold-Worked): Ideal for high-wear applications where styrka och durability are paramount.

Leverantörer och prissättning

Finding reliable suppliers for QAl9Mn2 is essential for ensuring quality och affordability. Below is a list of reputable suppliers and their pricing details.

Leverantörer och prisinformation

LeverantörPlatsPrisintervall (per kg)Delivery Time
Shanghai MetalsKina$20 – $352-4 weeks
Stormarknader för metallUSA$25 – $401-2 veckor
EuroAlloysEuropa€22 – €382-3 weeks
BrassAlloy SupplyIndien$18 – $301-3 weeks
CopperAlloy SolutionsSTORBRITANNIEN£22 – £402 veckor

Factors Affecting QAl9Mn2 Pricing

  • Form and Size: Larger plates or rods tend to be more expensive due to the raw material cost.
  • Betyg: Cold-worked grades are usually priced higher than annealed eller soft versions.
  • Plats: Pricing can vary significantly depending on shipping costs, import/export duties, och supplier location.

För- och nackdelar

No material is without its strengths and weaknesses. Let’s take a closer look at the Fördelar och Begränsningar av QAl9Mn2.

Fördelar och begränsningar

FördelarBegränsningar
Utmärkt korrosionsbeständighetMore expensive than standard brass eller bronze alloys
Hög wear resistanceLägre elektrisk ledningsförmåga than pure copper
Bra machinabilityCan be more difficult to machine compared to softer alloys
High tensile strength och durabilityCold-worked versions may be harder to form
Suitable for marine och high-stress environmentsNot the best option for high-conductivity applications

Viktiga slutsatser

  • QAl9Mn2 offers an outstanding balance of styrka, korrosionsbeständighet, och wear resistance, making it a top choice for marine, flyg- och rymdindustrin, och machinery applications.
  • The alloy is more expensive than standard brass eller bronze but offers superior performance in demanding environments.
  • Medan machinable, it may require special tooling due to its hardness in some cases.

Comparing QAl9Mn2 with Other Copper Alloys

Curious how QAl9Mn2 stacks up against other alloys? Let’s compare it to similar materials like QAl10-3-1.5 och CuAl8Fe3.

QAl9Mn2 vs. QAl10-3-1.5 vs. CuAl8Fe3

FastighetQAl9Mn2QAl10-3-1.5CuAl8Fe3
Draghållfasthet500 – 700 MPa600 – 800 MPa450 – 650 MPa
Utbyteshållfasthet250 – 400 MPa300 – 500 MPa200 – 350 MPa
Töjning10 – 20%8 – 15%15 – 25%
Motståndskraft mot korrosionUtmärktUtmärktBra
SlitstyrkaHögMycket högMåttlig
BearbetbarhetBraRättvistBra
KostnadMåttlig till högHögMåttlig

Viktiga lärdomar från jämförelsen

  • QAl9Mn2 offers a balanced mix of styrka, machinability, och wear resistance, making it a versatile choice.
  • QAl10-3-1.5 offers slightly higher styrka but at the expense of machinability och cost.
  • CuAl8Fe3 is more affordable but lacks the wear resistance och korrosionsbeständighet av QAl9Mn2.

Vanliga frågor och svar (FAQ)

We know that choosing the right alloy can be a bit overwhelming, so here are the answers to some common questions about QAl9Mn2.

FrågaSvar
What is it used for?It is commonly used in marine, flyg- och rymdindustrin, och machinery applications due to its styrka, korrosionsbeständighet, och wear resistance.
Is it corrosion resistant?Yes, it offers excellent korrosionsbeständighet, particularly in marine environments where exposure to seawater is common.
How much does it cost?Prices typically range from $20 to $40 per kg, depending on the supplier, form, och grade.
Can it be heat treated?It is not typically heat-treated for strengthening, but it can be cold-worked to improve its mechanical properties.
What are the key properties of QAl9Mn2?It offers a combination of high tensile strength, excellent wear resistance, och good machinability.
Is it easy to machine?Yes, but special tools may be required due to its hardness, especially in cold-worked grades.

Slutsats

QAl9Mn2 is a high-performance aluminum bronze alloy that stands out for its styrka, wear resistance, och korrosionsbeständighet. It’s an ideal material for industries that operate in harsh environments or require parts that can handle high stress och friction.

Whether you’re designing marine components, aerospace parts, or heavy-duty machinery, QAl9Mn2 offers the durability and reliability you need. While it may be more expensive than other alloys, the long-term benefits of reduced maintenance and increased performance more than make up for the cost.

In summary, if you’re looking for a material that can withstand the toughest conditions, QAl9Mn2 should be at the top of your list.

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