Classification of aluminum materials
Rolled materials, cast materials, non-heat-treated alloys, pure aluminum alloys (1××× series), aluminum-copper alloys (2××× series), aluminum-manganese alloys (3××× series), aluminum-silicon alloys (4 ××× series), aluminum magnesium alloy (5××× series), aluminum magnesium silicon alloy (6××× series), aluminum zinc magnesium alloy (7××× series), other elements of aluminum alloy (8××× series).
Classification of brass materials
Brass can be divided into two categories: 1. ordinary brass, 2. special brass
Ordinary brass is the binary alloy of copper bai zinc du: H90, H80, H68, H62
Special brass is made by adding other alloy elements on the basis of copper-zinc binary alloy: lead brass, manganese brass, silicon brass, nickel brass, aluminum brass, tin brass, iron brass, bismuth yellow Copper, antimony brass, magnesium brass.
Application and characteristics of bronze
Bronze originally refers to copper-tin alloy. Because bronze has high strength, good sliding friction resistance, excellent cutting performance and good welding performance, it has good corrosion resistance in the atmosphere and fresh water. Therefore, bronze is widely used for this purpose For elastic components such as springs and reeds and pipe fittings, chemical equipment, wear-resistant parts and anti-magnetic parts, and the production of friction-resistant parts in the aviation, automobile, tractor industry and other industries.
Classification of copper materials
Copper got its name because of its purple-red color. It is not necessarily pure copper, and sometimes a small amount of deoxidizing elements or other elements are added to improve the material and performance.
Red copper is therefore also classified as a copper alloy. Chinese copper processing materials can be divided into ordinary copper (T1, T2, T3, T4), oxygen-free copper (TU1, TU2 and high-purity, vacuum oxygen-free copper).
Classification of steel materials
1 Carbon structural steel
2 Low alloy high strength structural steel
Composition of general low alloy high strength structural steel grades
Special low alloy high strength structural steel
3 High-quality carbon structural steel
4 Free-cutting structural steel
5 Alloy structural steel
6 Spring steel
7 Ensure the hardenability of structural steel
8 Weathering steel for welding structure
9 High weather resistance structural steel
10 Rolling bearing steel
11 Chrome-free bearing steel
12 Carburized bearing steel
13 Carbon tool steel
14 Alloy tool steel
15 High-speed tool steel
16 Stainless steel
17 Heat-resistant steel
Classification of stainless steel
Stainless steel is divided into martensite and austenite, ferrite and duplex.
1. Martensitic chromium stainless steel is mainly low carbon or high carbon steel with chromium content in the range of 11.5%-18%. Designations 403, 410, 414, 416, 416 (Se), 420, 431, 440A, 440B and 440C, the corrosion resistance of these steels comes from “chromium”.
2. Austenitic stainless steel has stable austenite structure when Cr contains about 18%, Ni 8%~10%, and C about 0.1%. Non-magnetic and has high toughness and plasticity, but the strength is low, it is impossible to strengthen it by phase transformation, it can only be strengthened by cold working.
Uses and application fields of magnesium
Application of raw magnesium
The application of primary magnesium is mainly concentrated in the production of magnesium alloys, steelmaking desulfurization, and also used in rare earth alloys, metal reduction, corrosion protection and other fields. Many steel mills use magnesium for desulfurization. The desulfurization effect of using magnesium particles is better than calcium carbide. The use of magnesium sacrificial anodes for cathodic protection is an effective method to prevent metal corrosion.
Classification, characteristics and applications of titanium alloys
Titanium is a new type of bai metal. The performance of titanium is related to the content of impurities such as carbon, nitrogen, hydrogen, and oxygen. The purest titanium iodide contains no more than 0.1% dao, but its strength and plasticity are low. high. The performance of 99.5% industrial pure titanium is: density ρ=4.5g/cm3, melting point of 1725℃, thermal conductivity λ=15.24W/(mK), tensile strength σb=539MPa, elongation δ=25%, section Shrinkage ψ=25%, elastic modulus E=1.078×105MPa, hardness HB195.