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Current position:HOME>>NEWS>>About Products>>About nonferrous practical knowledge
About nonferrous practical knowledge(Hits:) 
Origin Author Add Time2015-04-27
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1. Classification and non-ferrous metal products grades representation
First, the classification of non-ferrous metals

(1) non-ferrous metal into pure metals, light metals, precious metals, semi-metals and rare five.
(2) non-ferrous alloys by alloy system is divided into: Heavy non-ferrous alloys, non-ferrous metals light alloys, precious metal alloys, alloys and other metals; can be divided according to the alloy Uses: deformation (pressure processing alloy), cast alloy, bearing alloys, printing alloy, carbide, solder, master alloys, metal powder, etc.
(3) non-ferrous material classification according to the chemical composition of: Copper and copper alloy material, aluminum and aluminum alloy materials, lead and lead alloy material, nickel and nickel alloy material, titanium and titanium alloy materials. When classified by shape, can be divided into: plate, strip, strip, foil, tubes, rods, wire, type and other varieties.

Second, the product is indicated in grades

(1) the principle of non-ferrous metal and alloy products named brands named to the provisions of international phonetic alphabet or symbols of elements as MeSH codes representing their respective categories, as expressed by L or AL aluminum, T or Cu copper. After the keywords, in numerical order with ingredients combined product category to represent. After that keywords can indicate the status of the product code, feature or the main ingredient, such as anti-LF (F) rust aluminum (L) alloy; LD for forging (D) made with aluminum (L) alloy; LY hard (Y) aluminum (L) alloys, alloys of these three keywords is aluminum (L). Another example QSn for cyan (Q) copper as the main additive elements of tin (Sn) of a class; QAL9- 4 for cyan (Q) copper containing aluminum (AL), the aluminum component added element 9%, other additives element is 4 percent, keywords both alloys bronze (Q). Therefore, the product code is the keyword phonetic alphabet, chemical element symbols and Arabic numerals by the standard method of combining (GB340- 78) defined to represent.

The state of non-ferrous metal and alloy products, processing methods, features of the code, using the provisions of Pinyin letters. Such as thermal processing of R (thermal), hardening of C (quenching), not clad in B (not), X fine particles (fine) and so on. But a few will be external, such as the quality of the surface O (figurative representation perfect) and so on.

2 Copper and copper alloys

First, copper

Pure copper is rose red metal, copper oxide film formed on the surface after the purple, it is often called industrial copper or copper electrolytic copper. Density of 8-9g / cm3, a melting point of 1083 ° C. Good electrical conductivity of copper, used extensively for the manufacture of wires, cables, brushes, etc; good thermal conductivity, used to manufacture beware of magnetic interference magnetic instruments, meters, such as compass, aviation instrumentation; plastic excellent, easy-to-heat pressure and cold pressure processing, can be made into tubes, rods, wire, strip, strip, plate, foil, copper. Copper smelting products and processed products are two kinds.

Two, a copper alloy

(1) Brass

Brass is an alloy of copper and zinc. The simplest brass is copper - zinc binary alloy, known as a simple brass or ordinary brass. Change the content of zinc in the brass can be different mechanical properties of brass. The higher levels of zinc in brass, its intensity is higher, lower plasticity. Brass zinc industry used does not exceed 45%, the high zinc content will be brittle, the alloy performance deterioration.

In order to improve the performance of a brass, adding other alloying elements on the basis of one dollar brass on brass called special brass. Common alloying elements silicon, aluminum, tin, lead, manganese, iron and nickel. Alcan in brass brass can increase the yield strength and corrosion resistance, slightly lower plasticity. Less than 4% of aluminum-containing brass has good processing, casting and other overall performance. In seawater, and the ability of anti-brass plus 1% tin can significantly improve the marine atmospheric corrosion of brass, so called "Navy brass." Tin can improve cutting performance of brass. The main purpose of leaded brass is to improve machinability and improved abrasion resistance, impact of lead on the strength of brass. Manganese brass has good mechanical properties, thermal stability and corrosion resistance; Alcan in manganese brass, you can also improve its performance, the smooth surface of the casting. Brass casting and pressure processing can be divided into two types of products. Common chemical machining brass component.

(2) Bronze

Bronze is the application of the earliest history of an alloy, originally referred to the copper-tin alloy, because of the color was gray, so called bronze. In order to improve process performance and mechanical properties of the alloy, most of the bronze also joined other alloying elements, such as lead, zinc, and phosphorus. As the tin is a scarce element, so it is used in many industrial Wuxi bronze tin-free, they are not only inexpensive, but also has the desired special properties. Wuxi bronze mainly aluminum bronze, beryllium copper, manganese bronze, silicon bronze. There are also more complex composition ternary or quaternary bronze. Now in addition to brass and copper-nickel alloy (copper-nickel alloy) copper alloy called bronze.

Bronze has high mechanical properties, good corrosion resistance, friction reduction and good casting properties; little sensitivity to overheating and gas welding performance, no ferromagnetism, contraction coefficient. Bronze in the atmosphere, water, fresh water and steam corrosion resistance than the high brass. Have a high ratio of aluminum bronze bronze mechanical properties and wear resistance, corrosion resistance, cold, heat, no ferromagnetism, good liquidity, no segregation tendency obtained dense castings. Adding iron, nickel and manganese and other elements in aluminum bronze, you can further improve various properties of the alloy.

Bronze pressure processing is also divided into two categories and casting products.

(3) copper-nickel alloy

Nickel as the main element of the copper-based alloy with silver white, called copper-nickel alloy. Copper-nickel binary alloy that ordinary copper-nickel alloy, plus manganese, iron, zinc and aluminum and other elements of copper-nickel alloy called complex alloy, copper plus nickel can significantly improve strength, corrosion resistance, resistance and thermal resistance. Industrial copper-nickel alloy according to the performance characteristics and uses divided into structural and electrical copper-nickel alloy are two, respectively, to meet a variety of corrosion and special electrical and thermal properties.

Third, copper

With copper or copper alloys in various shapes including rod, wire, sheet, strip, bar, pipe, copper foil collectively. There are rolling copper processing, extrusion and drawing methods, copper in the hot-rolled sheet and strip and cold rolling; and strip and foil are cold rolled; tubes and rods are divided To squeeze and pull products products; wire is drawn.

3. aluminum and aluminum alloys

Aluminum is a light metal, low density (2.79 / Cm3), has good strength and ductility, aluminum alloy has good strength, the strength of super-hard alloy up to 600Mpa, tensile strength is also common duralumin 200 -450Mpa, it's stronger than steel is much higher than steel, it has been widely used in machinery manufacturing. Conductive aluminum second only to silver and copper, ranking third for the manufacture of a variety of wire. Aluminum has good thermal conductivity, heat can be used as various materials. Aluminum also has good corrosion resistance and good plasticity, suitable for all kinds of pressure processing.

Aluminum alloy processing methods can be divided into deformation of aluminum and cast aluminum. Deformation is divided into non-heat-strengthened aluminum alloy and heat-strengthened aluminum alloy. Enhanced heat treatment can not by heat treatment to improve mechanical properties, can only be achieved by cold deformation strengthening, which includes high purity aluminum, industrial high purity aluminum, industrial aluminum and rust-proof aluminum. Heat treatable aluminum alloy can improve the mechanical properties by quenching and aging heat treatment, it can be divided into hard aluminum, wrought aluminum, super-hard aluminum and special aluminum alloy.

Aluminum alloy can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance.

Cast aluminum alloy can be classified according to chemical composition of Al-Si alloys, aluminum-copper alloy, magnesium alloy and aluminum-zinc alloy.

First, aluminum products

Aluminum smelting products and pressure processed sub-categories, the former chemical composition Al, said the latter is represented by pinyin LG (aluminum, industrial use).

Second, the pressure processing aluminum

Aluminum pressure processing products into antirust (LF), hard (LY), forging (LD), superhard (LC), coated (LB), special (LT) and brazing (LQ) and other seven categories. State common aluminum alloy material is annealed (M Annealing), sclerosis (Y), hot-rolled (R), three.

Third, aluminum

Aluminium and aluminum alloys processed into a certain shape of the material referred to aluminum, including sheet, strip, foil, tube, rod, wire, type and the like.

Fourth, cast aluminum alloy

Cast aluminum alloy (ZL) by major elements of silicon components other than aluminum, copper, magnesium, zinc divided into four categories, code encoding respectively 100,200,300,400.

Five, high-strength aluminum alloy

High-strength aluminum alloy means a tensile strength greater than 480 MPa aluminum, primarily in hard alloy aluminum pressure processing class, hard aluminum alloy casting classes and classes.

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