TECHILA

Annealing is a process that is carried out to improve the softness and ductility in steels and other worked metals at high temperature. It is considered as a heat treatment process to refine the size, to relieve the internal stress, to remove trapped gases. This process is also carried out to alter the magnetic and electrical properties of the metals. Different types of annealing processes are carried out as follows:

• Full Annealing:

This process of heating the steel is carried at different temperatures for hyper- eutectoid and hypo eutectoid steels. Hypoeutectoid steels are heated to temperature of 30° to 50°C above the upper critical temperature and hypereutectoid steels are heated at the same temperature but above the lower critical temperature. It is held at this temperature for some time and then it is slowly cooled at the rate of 30° to 200°C per hour. Cast iron box is used as a container with some mixture to avoid decarburization of the steel. Mixture consists of lime, sand, charcoal and cast iron borings. This process softens the steel and improves machinability but decreases the hardness and tensile strength.

• Process Annealing:

Here in this process, temperature is maintained below the lower critical temperature and then it is cooled. This will result in recrsytallisation thereby removing the internal stresses in the steel and also machinability is increased.

• Patenting:

 Ductility of high carbon steels are improved by this process. First heating process is carried out and then the steel will be cooled below air temperature.

• Stress-Relieving Annealing:

Re-crystallization is done at first and then steel is cooled. Internal stresses due to casting, forging, etc., are removed by this process of annealing.

• Double Annealing:

 It uses to remove the strains in the steel. Reheating process is done in addition to the normal heating process so as to produce homogenetity by rapid diffusion.

For more info click here

AIDS is nothing but a silent killer. It is caused mainly because of HIV virus. It is only the infection from HIV virus that leads to the slow death. It may later develop into that deadliest disease. It reduces the immunity power of the human being. The immune power is responsible to fight against the bacteria, virus and fungi. If one gets affected by HIV, his immune power reduces and he may get affected by any diseases. It is mainly caused if one has sex with HIV infected person. Organ transplantation, blood transfusion between HIV infected person and unsterilized needle also leads to HIV infection. If a mother is having HIV then the new born baby has HIV by drinking mother milk.

Mobile phones and PDA’s are indeed ruling the world like demons, but not to an extent like this. I came across peculiar news where an employee of a factory that manufactures iPhones committed suicide subsequent to a loss of a prototype that went missing. The 25 year old Sun Danyong worked in Foxconn Technology Group as an executive. The Taiwanese company manufactures Apple artifacts at a huge factory near Hong Kong. Working in these types of industries involves lots of stress as top level confidentiality is to be maintained on gadgets. Since Apple is one of the top most firms in the world which produces up-to-the-minute technology products, it has to enforce such pressure on its employees to uphold the secrecy of its products and software. Unfortunately Mr. Sun lost one of the models of the 4th generation iPhone that were under his control. He was very much badly timed because the company did not trust him and badly beat him up and apprehended him too. The disappointed lad jumped from the 13th floor of his flat building abruptly ending his life in dismay.

I was so shocked on hearing that because a man’s life has no respect when compared to an instrument that just fits into our pocket. It is really annoying when a young lad is forced to commit suicide just for a loss that happened without his knowledge. In today’s chaotic world mankind has lost its value and money’s dominance is at its peak. It in fact symbolizes for what real preference is given now a days. The poor fellow had a good future which he ended unthinkingly. He is also to be blames for his cowardly act. Perhaps he may be a too sensitive person which may have driven him to take the extreme step.

For more information click here