Application status of medical titanium rod and medical titanium wire in the field of medical device production in China

Aiming at the problem of cracks and fragments that often occur in titanium carbide alloys during welding and use. In order to improve the strength and toughness of titanium alloys and prevent cracks and fragments, the proposed process improvement measures for improving the strength and toughness of the alloy are as follows:

Too high a temperature will speed up the growth of titanium carbide grains. 1 Sintering temperature 　 The final sintering temperature of titanium carbide high manganese steel-bonded cemented carbide is generally 1420 ℃. The sintering temperature should not be too high. Even the bonding phase becomes the liquid phase and the metal is lost so that the hard phase abuts, aggregates and grows up, forming a source of fragmentation. This is the reason why the bonding phase between the hard phase crystal grains analyzed earlier has become less. Of course, the sintering temperature should not be too low, otherwise, the alloy will be underburned.

Especially in the three stages of degumming, reduction and liquid phase sintering, 2 the heating rate during sintering is not suitable for such alloys. It is necessary to strictly control the heating rate and holding time. Because in the low-temperature degumming stage, the compaction releases the compression stress and the forming agent volatilizes. If the heating speed is fast, the forming agent is too late to volatilize and becomes steam after liquefaction, causing the compaction to burst or microcrack; above 900℃ In the reduction stage, the green compact should have enough time to remove the volatiles and oxygen in the raw material powder (such as Mn2Fe master alloy); when entering the liquid phase sintering stage, the heating rate should also be slowed down to fully alloy the green compact. The sintering principle of steel-bonded cemented carbide is the wetting principle. Let the liquid phase fully wet the solid phase (hard phase), otherwise, the liquid-phase metal FeMn will be precipitated on the surface of the compact, or even lost.

In addition to the aforementioned need to control the sintering temperature and speed, the vacuum in the 3 furnaces enters the liquid phase sintering stage. It is also necessary to control the vacuum degree in the furnace during sintering because too high a vacuum degree will volatilize a large amount of liquid metal and cause component segregation.

Aiming at the problem of cracks and fragments that often occur in titanium carbide alloys during welding and use. In order to improve the strength and toughness of titanium alloys and prevent cracks and fragments, the proposed process improvement measures for improving the strength and toughness of the alloy are as follows:

Too high a temperature will speed up the growth of titanium carbide grains. 1 Sintering temperature 　 The final sintering temperature of titanium carbide high manganese steel-bonded cemented carbide is generally 1420 ℃. The sintering temperature should not be too high. Even the bonding phase becomes the liquid phase and the metal is lost so that the hard phase abuts, aggregates and grows up, forming a source of fragmentation. This is the reason why the bonding phase between the hard phase crystal grains analyzed earlier has become less. Of course, the sintering temperature should not be too low, otherwise, the alloy will be underburned.

Especially in the three stages of degumming, reduction and liquid phase sintering, 2 the heating rate during sintering is not suitable for such alloys. It is necessary to strictly control the heating rate and holding time. Because in the low-temperature degumming stage, the compaction releases the compression stress and the forming agent volatilizes. If the heating speed is fast, the forming agent is too late to volatilize and becomes steam after liquefaction, causing the compaction to burst or microcrack; above 900℃ In the reduction stage, the green compact should have enough time to remove the volatiles and oxygen in the raw material powder (such as Mn2Fe master alloy); when entering the liquid phase sintering stage, the heating rate should also be slowed down to fully alloy the green compact. The sintering principle of steel-bonded cemented carbide is the wetting principle. Let the liquid phase fully wet the solid phase (hard phase), otherwise, the liquid-phase metal FeMn will be precipitated on the surface of the compact, or even lost.

In addition to the aforementioned need to control the sintering temperature and speed, the vacuum in the 3 furnaces enters the liquid phase sintering stage. It is also necessary to control the vacuum degree in the furnace during sintering because too high a vacuum degree will volatilize a large amount of liquid metal and cause component segregation.
Grade 36 Titanium Bar     Gr9 Ti-3Al-2.5V Titanium Wire     titanium tube grade 9     Grade 12 Titanium Pipe