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Anonymous users2024-02-11The standards are different from country to country, and the names are different.
German grade: 45S20K is a free-cutting steel.
Chinese grade: Y40MN
U.S. Grade: 1144
Japanese grade: SUM43
UK grade: 220m44
16 yuan kg.
The composition is similar to 40mn but the mn content is much higher.
The carbon content of 40s20k is lower than that of the former.
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Anonymous users2024-02-1045S20K is a free-cutting structural steel, which is a high-sulfur low-carbon free-cutting steel. Standard: GB T8731-1988
**: 15 yuan kg.
Chinese grade: Y40MN
Japanese grade: SUM43
UK grade: 220m44
U.S. Grade: 1144
Suzhou Industrial Park Huitong metal products **** are available.
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Anonymous users2024-02-09DIN Germany: 45s20k
Easy car iron is the most commonly used steel.
United States: SAE: 1144 AISI: 1144 United Kingdom: 220m44
JIS Japan: sum43
GB China: Y40mn
International code: Y40MN is about 16 yuan a kilogram in China.
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Anonymous users2024-02-0845S20K is a free-cutting steel.
Corresponding grades:
International code-din-germany-jis, Japan-UK-SAE-AISI-GB, the comparison of brands in various countries in China is only the general performance of the same, can not be completely one-to-one correspondence.
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Anonymous users2024-02-07Domestic zinc domestic zinc alloy grade and composition are as follows:
Extended Materials. The effects of mulching agents.
Theoretically, the addition of covering agent can reduce the oxidation, evaporation and outgassing of the elements in the alloy. Therefore, charcoal was used as the mulching agent in the experiment. The results show that the suction tendency of zinc alloy is small, and there is very little gas precipitation when charcoal is not used for smelting, and the alloy burning loss is small, while the addition of charcoal will bring inconvenience to the operation and increase the entrainment amount of alloy liquid in the slag.
Considering that the power frequency coreless induction furnace has good sealing, and the alloy liquid in it is automatically stirred by electromagnetic action, it can be produced with less or no charcoal and other covering agents.
Effect of refining agents.
The refining agent is used for degassing and slag removal of alloy liquid, which has excellent effect. According to reports, in 450
At 470, the ammonium chloride is pressed into the bell cover, which can remove nearly 80% of the zinc alloy liquid
oxides and 70% intermetallic compounds, so that the quality of the alloy can be guaranteed.
However, our experiments also found that the use of ammonium chloride refining (the amount is about 0 of the total weight of the metal
It will increase the alloy melting rate, and at the same time produce a large amount of smoke and ammonia in the process, which may deteriorate the operating environment.
Therefore, the amount of returned material can be used to determine whether to carry out the slag making operation and the amount of ammonium chloride to be added.
Al-Cu master alloy fabrication.
The conventional two-step smelting method prefabricates the middle alloy first, which is mainly to facilitate the addition of copper with high melting point and shorten the melting time of zinc alloy. Select the AL according to the phase diagram
The CU eutectic composition has a melting point of 548 and can melt as quickly as possible in the zinc melt.
The test observed that the high temperature AL
When the Cu alloy solution solidifies, a large amount of gas is precipitated, and Al
2O3 suspended slag is large. The average total melt loss rate of the alloy has been as high as 7
left and right, indicating that there is a large amount of metal (mainly AL) lost in the process.
It belongs to the German standard special alloy structural steel, the implementation standard: EN 10083-3-2006 has the advantages of good wear resistance, high toughness, high hardness, high compressive strength and dimensional stability, and has good corrosion resistance, polishing and pin cutting performance is also very good, and it is easy to achieve mirror effect. >>>More
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