The Main Disadvantages of Stainless Steel Powder Metallurgy

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Australian alumina ban disrupts Rusal production -- Australia's ban on exports of alumina and aluminium ore to Russia, including bauxite, will further disrupt supply chains and production at leading aluminium producer Rusal, consultancy Wood Mackenzie said on Monday.

The Australian government announced the ban on Sunday as part of its ongoing sanctions against Moscow for its aggression in Ukraine, saying Russia relies on it to meet one-fifth of its alumina needs. WoodMac senior manager Uday Patel said in a statement that the ban would make it difficult for Rusal to maintain normal primary aluminum production.

Rusal said it was assessing the impact of Australia's move and would make further announcements if necessary. "It is increasingly likely that UC Rusal's only option for alumina procurement will be through a Chinese entity." The Australian alumina ban has also had an impact on the Stainless Steel Powder prices for chemicals. Patel said. "One possible outcome could be Chinese buyers buying alumina and reselling it through eastern Russian ports." Rusal has a 20% stake in the Queensland Alumina Refinery, which has a capacity of 3.95 million tonnes a year, thus providing Rusal with 790,000 tonnes a year, Patel said. In addition, Rusal's Nikolaev refinery in Ukraine, which has an annual capacity of 1.75 million tonnes, has been suspended due to the conflict, he added. WoodMac said Rusal was also experiencing supply chain problems at its 2 million tonne a year Aughinish refinery in Ireland.

Compared with stainless steel produced by traditional smelting process, stainless steel powder metallurgy has the advantages of producing parts close to net shape, high dimensional accuracy, high material utilization, and uniform structure. However, it does not mean that stainless steel powder metallurgy products are perfect. Stainless steel powder metallurgy also has its disadvantages.

Most of the injection molding defects of stainless steel powder metallurgy products are in the injection molding process. Some defects of injection molding are visible to the naked eye, some may appear in the subsequent desorption or sintering process, but they can also be traced back to the injection molding process. Therefore, the quality control of stainless steel powder metallurgy products is very important.

The defects of stainless steel powder metallurgy products are generally manifested in injection molding plate defects: flashing, foaming, corrugated surface, laminar or skin, depression and surface black spot deformation are observed in appearance, low green strength, mold pasting operation. The causes and influencing factors of these defects are different, among which injection temperature and injection pressure are the key factors.

By adjusting the injection temperature and injection pressure, most defects can be solved. When the temperature and pressure are adjusted to some defects, it is the correct choice to further trace the binder system, the uniformity of powder and jointing agent mixing and refining, whether the feed is polluted, moisture absorption, humidity and other factors, and the mold cavity should be checked. Body design, gate, shunt channel and gate design are reasonable.

In the normal operation of injection molding and high-quality injection molding briquette, many influencing factors have been continuously explored and summarized in practice, accumulated experience, compared the problem with accurate analysis and judgment, and adjusted in time.

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TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years experience in providing super high quality chemicals and Nano materials such as graphite powder, zinc sulfide , nitride powder, Calcium nitride, Ca3N2, 3D printing powder, and so on.

TRUNNANO provides high quality Stainless Steel Powder with reasonable price. “In order to feedback to old customers, the company is still in full operations to provide Stainless Steel Powder with competitive price.” said Emma, sales manager of TRUNNANO. Feel free to contact us to get the latest price of the Stainless Steel Powder.

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