The main advantage of the vacuum sintering are:

( A ) reducing the adverse effects of harmful components in the atmosphere (water , oxygen, nitrogen ) of the product . For example, the moisture content down to an electrolytic hydrogen 4 . ℃ dew point is very difficult, and as long as the vacuum reaches a moisture content of 133Pa 4 equivalent . The dew point ℃ . Such a degree of vacuum is obtained is not difficult.

( 2 ) should not be used for reducing or inert gas as protective atmosphere ( such as sintering of active metal ) or prone to decarburization can be carburized by vacuum sintering material .

( 3 ) The vacuum may improve the wettability of the solid relative to the liquid , and improvement of the alloy in favor of the contraction of the tissues .

( 4 ) helps the vacuum sintering silicon, aluminum , magnesium, or calcium oxide to exclude impurities , play the role of purifying material .

( 5 ) vacuum gas adsorption in favor of exclusion , and the residual gas in the pores of the reaction gas products , the promotion of post- sintering shrinkage plays a significant role . Such as porosity sintered carbide vacuum is significantly lower than the cemented carbide sintered in hydrogen .

( 6 ) protecting the vacuum sintering temperature than the sintering temperature of the gas to be low, such as cemented carbide sintering temperature can be reduced by 10 . ~ 150 ℃. This is beneficial to reduce energy consumption and prevent grain growth . Vacuum sintering , often volatile metal loss occurs. If volatilization occurs when cemented carbide drills . By strictly controlling the degree of vacuum even if the furnace pressure is not lower than the vapor pressure of a sintered metal component , but also can greatly reduce the loss of volatile metals or avoided . Another problem is that the vacuum decarburization sintering carbonaceous material . This mainly occurs in the heating phase, the residual gas in the furnace oxygen , water, and the oxide powder in other reactions can occur with the carbide compound free carbon in the carbon material or carbon monoxide in the furnace gas withdrawn ' . Decarbonization carbonaceous material can increase the carbon content of the powder feed and control the vacuum to resolve. To increase the heating rate and vacuum sintering furnace temperature uniformity can pass into the initial amount of the sintering gas (inert gas or hydrogen ) . Similarly recoverable gas cooling loop rejection methods to improve vacuum sintering cooling rate . In order to prevent contamination sintering vacuum forming agent system , compact vacuum sintering should be conducted prior to exclude burn- forming agent . In powder metallurgy , vacuum sintering is mainly used for the sintering of active metal and refractory metal being , social , Chin , wrong , Tam , saws , etc. ; sintered carbide, magnetic alloys, tool steel and stainless steel ; and sintering of those easy-to- hydrogen , nitrogen a compound of carbon monoxide and other gases react .

Su's heat treatment Co. Ltd. was founded in 1990, after decades of development, scale is continually expanding, is located in Shajing Town Baoan District Shenzhen City Bridge second industrial zone, covering an area of 3000 square meters, the main business is to take all the metal, alloy steel, beryllium copper, heat treatment of high speed steel, cryogenic treatment (-196 C), nitrogen gas, liquid nitrogen, QPQ salt bath production line, high-frequency quenching, blackening and carburizing, the surface of hard and stainless steel processing.
The company is equipped with power of heat treatment technology, established a perfect quality testing equipment, equipped with vacuum quenching furnace, vacuum furnace, pit furnace, furnace, liquid nitrogen atmosphere furnace, rotary furnace, large mesh belt furnace, improve metallographic inspection equipment, material failure analysis, scientific management and complete, rigorous technology, skilled operation.
Company will be excellent quality and perfect service, and actively challenge, satisfy customer demand, has passed ISO9001:2000 in 2003 September (SGS) international quality certification. Has now become a reputable manufacturers.