Stainless steel is greater than 12% of chromium-containing steels. Stainless steel made rapid development

since the 1912 invention, since the world is still an annual increase rate of 3-5%. Stainless steel

consumption worldwide total of 35 million. China is in a period of rapid growth for stainless steel

production and consumer applications, has been widely used in the petroleum, chemical industry, light

industry, food, brewing, pharmaceutical, household appliances, water, electricity, machinery, construction,

municipal and various civilian appliances. China's Stainless Steel Welding Wiresconsumption in 1990 to 26 million tons in

1999 to 1.53 million tons, 1.73 million tons in 2000, 225 million tons in 2001, the consumption of stainless

steel in 2004 reached 4.47 million tons, ranking the world's first Stainless steel consumption in 2006 is

expected to reach more than 6 million tons, consumption accounts for the total consumption of stainless

steel, chrome-nickel austenitic stainless steel 75% -80%.

China from the fifties to the development and production of stainless steel electrode, 1997 the total output

of China's stainless steel electrode for more than 7000 tons. Consumption of stainless steel in China in

recent years, the rapid growth of the domestic stainless steel electrode has more than 35 thousand tons in

2004, the 2006 domestic stainless steel electrode is expected to reach about 50,000 tons.

Stainless steel electrode developed since the fifties followed the former Soviet Union calcium titanium slag

system and raw materials system, it has the advantages of low cost, easy pressure coated, anti stomatal good,

good mechanical properties, but similar to the European brandStainless Steel Welding ElectrodesCompared redness

serious welding rod, big splash off slag and forming, welding and low efficiency, wastage, therefore, since

the mid-seventies to the early eighties, Sweden AVESTA green P5 electrode domestic imports for domestic

research institutions electrode production enterprises cooperate on stainless steel electrode covering

redness off and the solution to the research, such as Kazakhstan welding Welding Electrode Factory and

Tianjin, Gansu workers with Lan Chau Changhong welding electrodes, Taiyuan University of Technology, Shanxi

Machine Tool Plant and so on.

To the 1980s, the above several papers have been published, the one hand, people think that their work makes

sense to get a lot of progress; On the other hand, after electrode actual test of these several developed

that foreign products still significant gaps, but since then, the research work in this regard to the

situation in anything less from the early 1980s to the decade of the nineties, within no weight stainless

steel electrode research literature. From the early 1990s, the domestic stainless steel electrode research is

becoming more active. First, the basic principles and ways of stainless steel electrode process design,

Taiyuan industrial magnate Bao, Sun salty et al studied on the basis of the preliminary work has made an

important breakthrough in the stainless steel electrode design theory, and won the 2000 National Science and

Technology Progress Award ; after Tang Bo Steel, Building Research Institute of the Ministry of Metallurgical

Industry, digestion and absorption of foreign advanced technology in the mid-nineties, the successful

completion of a series of new domestic stainless steel electrode improvement to improve, and successfully set

up Beijing Jinwei Welding Materials Co., do the theory and practice the perfect combination of production

since its beginning in 1994 to the present, its stainless steel welding rod production has reached an annual

output of more than 3,000 tons.

The late nineties to the early part of this century, the domestic stainless steel electrode study, carried

out mushroomed, although itself does not exceed the level of the two existing levels, but still have the

benefits of active academic atmosphere and strengthen the exchange of learning.

Foreign stainless steel industrial production began in the early twenties, followed by the corresponding

stainless steel electrode, mature stainless steel electrode appeared around 1965, as the representative of

the European countries, especially in Western Europe, Sweden, a population of only 800 million people,

concentrated produce of ESAB, AVESTA and SANDVIK world-class stainless steel welding consumables enterprise,

which of AVESTA the Bison stainless steel electrode is a model of world stainless steel electrode. Japan,

Taiwan and South Asian countries, the stainless steel electrode technology foundation in Europe.

Overall domestic stainless steel electrode compared with foreign advanced level there are six major issues

need to be solved and research:

1, redness issues and anti-redness electrode. AVESTA Bison Green P5φ3.2 × 350 and φ4.0 × 400 stainless

steel electrode, respectively, in the 110-120A and 150-160A I head about 50mm the drug skin redness cracking.

P5-HX electrode φ4 × 450 or even 160-170A I head is not red, which is the best level of similar electrodes.

2, stomatal issues and anti-the stomata performance improve, and is generally believed that the stainless

steel the stomata case hydrogen prone visible stomata hole, in the last paragraph of the post-weld or weld

the front or multilayer welding. Abroad as long as the electrode is not damp or use by over 250 ℃ complex

bake will not appear on the vents. Now vacuum packaging with aluminum foil plastic composite film can be

avoided as long as the packaging prior to use complex drying processes directly, to avoid off the skin not

dried out pores or baked trunk injury. Stainless steel electrode stomata by the steel core, raw materials and

drying process fluctuations and domestic use more the sacrifice process performance, to ensure that no

stomata production principles, resulting in domestic stainless steel electrode level and physical level.

3, the question of efficiency and efficient welding rod. Ordinary stainless steel electrode deposition

efficiency is generally less than 110%, about 85%. Efficient stainless steel electrode is more than 140% up

to 180%, a significantly shortened welding electrode construction time, it has the following characteristics:

without redness without using large current can be as low carbon steel to improve work efficiency stomatal;

small spatter, weld appearance, the possibility of overheating of the electrode covering, easy to operate,

Japan Kobelco HIMELT series, AVESTA HX Series and ESAB's OK6X.41 series welding of large chemical equipment

often require efficient, domestic is still blank, worth noting is efficient only suitable for flat welding

and fillet welding stainless steel electrode.

4, carburizing series of problems and ultra-low carbon electrode, ultra-low carbon electrode is the focus of

the stainless steel electrode development at home and abroad, must require ultra-low carbon weld drug skin

does not increase carbon and ultra-low carbon welding core. Marble and rutile increase carbon source, should

seek other effective way.