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shuangyuan gas spring
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Classification and code non-ferrous metals
First, the classification of non-ferrous metals
(1) non-ferrous metals are divided into pure metals, light metals, precious metals, semi-metal and rare metal five.
(2) non-ferrous alloys
Divided by alloy system: heavy non-ferrous alloys, light non-ferrous metal alloys, precious metal alloys, precious metals alloys; use can be divided by alloy: deformation (pressure processing of alloy), cast alloy, bearing alloys, printing alloy, carbide , solder, alloy, metal powder and so on. gas spring
(3) non-ferrous materials
Classification by chemical composition: copper and copper alloy materials, aluminum and aluminum alloy materials, lead and lead alloy material, spring steel, nickel and nickel alloy materials, titanium and titanium alloy materials. When classified by shape, can be divided into: plate, strip, foil, tube, rod, line, type and other varieties.
Second, the product brands that way
(1) Nomenclature
Non-ferrous metal and alloy products, brands names, provides for the international elements of Chinese phonetic letters or symbols as a MeSH code, indicating their respective categories, such as that of aluminum with L or AL, T, or Cu indicated that copper. Keywords later, with the combination of ingredients in numerical order to represent the product category. Keywords that can be expressed product code-named after the state, characteristics, or the main ingredients, such as anti-LF (F) rust aluminum (L) alloy; LD for the forging (D) made of aluminum (L) alloy; LY for the hard- (Y) Al (L) alloy, these three keywords is aluminum alloy (L). Another example QSn Tsing (Q) the addition of copper in the main element tin (Sn) of a class; QAL9-4 for the Green (Q) of copper containing aluminum (AL), add the element Al composition of 9%, and other add elements of 4%, which is a bronze of two alloys Keywords (Q). Therefore, the product code is the standard (GB340-78) required MeSH phonetic alphabet, chemical element symbols and Arabic numerals to represent a combination of methods. Table 1 and Table 2:
Table 1, non-ferrous metals and alloys commonly used names and code elements
Name Code Name Code
Chemical element chemical element symbol phonetic alphabet code symbol phonetic alphabet code
Zinc Zn Cu CuT
ALL Aluminum Lead Pb
Magnesium MgM tin Sn
Antimony Sb Ni NiN
Titanium TiT Gold Au
Brass - H Ag Ag
Bronze - Q Cd Cd
Copper-nickel alloy - B Beryllium Be
Table 2 The name and code-specific non-ferrous alloys
Code name used by code name
LF rust aluminum magnesium alloy (deformation processing) MB
Forged aluminum alloy solder HI LD
Hard anodized aluminum nickel-NY LY
LC cell zinc plate aluminum super-hard XD
LT printed special aluminum alloy I
LQ printed aluminum brazing zinc plate XI
Oxygen-free copper TU RE Xt
Tungsten carbide cobalt metal powder F YG
Spray aluminum titanium cobalt tungsten carbide YT FLR
YZ cast tungsten carbide coating aluminum FLU
Titanium carbide thin aluminum FLX - (iron)-Ni-Mo carbide YN
Ultra-fine aluminum powder FLT purpose (universal) Carbide YW
Steel, chemical bonded carbide steel with aluminum YE FLG
Ch FM bearing alloy magnesium
Aluminum-magnesium casting alloy powder FLM Z
The status of non-ferrous metal and alloy products, processing methods, feature code, the use of the provisions of the Chinese phonetic letters. Such as thermal processing, R (heat), quenching of the C (quenched), not clad in B (not), fine particle X (small) and so on. But a few will, if the quality of the surface O (visualize that perfect) and so on.gas spring
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Posted: 11:55 PM, 7/14/2011 |
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OOil quenching - spring steel wire Applications
First, the state oil quenching% 26mdash; tempered spring steel wire briefly review the history of
Oil quenching% 26mdash; tempered spring steel wire production technology originated in Europe, currently represented good business for the Swedish Proton Philippines. gas spring And Belgium Bekaert. The technology soon spread to Japan, currently represented by enterprises as Kobe, Sumitomo, high frequency and so on. China in the early 70s of their own oil quenching% 26mdash; tempered spring steel wire production technology. In China the oil quench% 26mdash; tempered spring steel wire production technology process, the former Beijing special steel wire drawing plant belongs to the engineering and technical personnel and former Beijing Iron and Steel Institute (Beijing University of Technology) students of teachers have made outstanding contributions. October 1974 belongs to the former Beijing special steel wire drawing workshop successfully put into mass production of the technology, opened China's oil quenching% 26mdash; tempered spring steel wire production of a new chapter, and keep the plant nearly two decades of unmatched the domestic market situation. During the planned economy system will be under some steel companies have put into trial production of the technology, but mechanisms, technology issues and did not materialize. After reform and opening up especially in recent years, with the automotive industry, motorcycle industry, diesel engine industry, machinery industry is developing rapidly, and the current processing base in China has gradually become the development trend of the world. The temptation to make a variety of capital and interests competing for access to the industry. Has been found in metal products such as the Research Institute of Zhengzhou, pilot Plant, Henan Yufeng, Hebi, Henan, Zhengzhou New Asia, Tianjin & Harvest, Tianjin Xin Hao, Jiangsu Gods, Shanghai Joint, Hunan Sipu Ling, Nanjing, Soochow Zhejiang Haina more than a dozen oil quenching% 26mdash; tempered spring steel wire manufacturers. And there are still domestic and foreign capital to invest in the industry.
Second, oil quenching% 26mdash; tempered spring steel wire briefly review the history of technology
China in the oil quenching% 26mdash; tempered spring steel wire production technology course of study, mainly in Sweden and Japan, with reference to technical standards and technology ideas. But in the early stages of the process technology R & D problems, equipment problems, production efficiency, product cost, and take some detours. Until the late 80s, early 90s, our oil quenching% 26mdash; tempered spring steel wire production process was basically stable, at present, the stability of commonly used material for their products according to the level of order as follows: 50CrVA, 60Si2MnA, 65Mn, 70 # , 82B, 55CrSi, SUP12, SAE9254, 55CrSiV.
Third, China's oil quenching% 26mdash; tempered spring steel wire briefly review the history of product quality
China's oil quenching% 26mdash; tempered spring steel wire from the unstable quality of products to meet the basic needs of low-end spring products, met a lot of quality problems. Some problems have been solved, some issues still need further study measures to solve them.
Has been basically solved the problem:
1, the wire brittle fracture problems (around the spring of natural fracture and fracture) 2, decarburization problems (caused by poor processing) 3, the crack problem (the problem of raw materials, processing of non-performing) 4, the problem of uneven size (processing defect) 5 , a small sickle bending problems (bad process) 6, dimensional accuracy problems
Although these individual problems, the basic domestic has been resolved. But together, these problems continue to affect oil quenching% 26mdash; tempered spring steel wire of the overall performance. Specific performance properties of steel cleaning rod instability, leading to increased instability in the spring, especially the fatigue life of valve springs up to meet the prescribed requirements.
To reduce our oil quenching% 26mdash; tempered spring steel wire and the gap between the quality of foreign products, should further improve the level of knowledge of the kinds of products, increase research and development, technology and equipment. While strengthening cooperation with raw material manufacturers. To ensure product quality to a new level, otherwise we can only spring in the low-end products in the field wandering.
Fourth, oil quenching% 26mdash; tempered spring steel wire Features
1, the yield is high and small residual deformation spring. 2, through Article stable performance: is less than the same drive favorable 75Mpa spring coil spring and improve the fatigue life. 3, as compared with the traditional spring production, can be avoided around the spring after some of the processes. 4, to become useful around the spring rate, can reduce costs.
Fifth, oil quenching% 26mdash; tempered spring steel wire Scope
Oil quenching% 26mdash; tempered spring steel wire can not replace cold-drawn spring steel wire. Particularly the small size spring steel wire. Oil quenching% 26mdash; tempered spring steel wire for valve springs is, the fatigue performance of suspension springs, and developed. And to achieve the best results, should also be combined in the shot peening treatment after around spring. Spring manufacturers in the storage of the kind of wire should pay attention to the role of its time, the use of that time after spring steel wire around the post-order processing. Do not store the improper use damage. Products in recent years as awareness of the standards, the products gradually applied to the clutch spring and rigging cars and other products. Oil quenching% 26mdash; tempered spring steel wire is able to fully meet the extension spring, torsion spring, shaped spring, and spring need to deposit requirements, to be further explored.
VI, oil quenching% 26mdash; tempered spring steel wire a brief analysis of market situation
China will become the world's processing base, but also the world's largest market. For this reason, oil quenching% 26mdash; tempered spring steel wire will be more competition in the market tend to heating. Although it is some large-scale use of imported spring steel wire factory, but delivery time and price, after all, has some limitations, and most companies still choose to use the spring steel wire of domestic enterprises. But with the increase of domestic producers, this will bring increased competition, especially in Shanghai in May this year, a domestic corporate joint venture with two Japanese companies to build the% 26ldquo; giant% 26rdquo; plant put into operation, will certainly be part of the oil quenching % 26mdash; tempered spring steel wire manufacturers because of mechanisms, personnel issues, technical issues, equipment problems, financial problems are eliminated. The rest of the business if not vigilant, take measures as soon as possible, only low-end products in the market difficult to survive.
The oil quench% 26mdash; tempered spring steel wire manufacturing enterprises increased competition will inevitably be a price war and quality of World War II, which gave the spring production enterprises must bring benefits.
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Posted: 11:52 PM, 7/14/2011 |
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Rubber spring
Rubber elastic spring is a high score, production of materials of ordinary rubber. Elastic modulus of rubber spring, under load greater elastic deformation, to absorb shock and vibration. It can also be more to load, but the high temperature resistance and oil resistance than steel springs poor. If special requirements are made available oil and rubber. Damping effect of the product is good, the resonance field, long service life, low cost, and good cold resistance, excellent air tightness, water resistance, electrical insulation, is the best choice for vibration.
Features: unlimited shapes, a larger elastic deformation, easy to achieve non-linear Yaoqiu, vibration insulation effect is good.
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Posted: 11:42 PM, 7/14/2011 |
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