Meanwhile, natural gas or natural gas only place where there are certain areas in Indonesia, especi

When the steel that has been heated to a temperature of the flame of oxygen normpack reacted with pure O2 as above, Possibility - the possibility that there is a mixture of all three types of metal oxide and residual Fe is not in action.
Given that this process is a chemical reaction of oxidation reactions, then to metal - metal that is resistant oxsidasi (Oxidation resistant metals) the need for the addition of a chemical flux or iron powder as an ingredient that can react exothermic.
- Melting metal in the piece should be higher than the temperature of the flame of oxygen. when the melting temperature of the metal being cut is lower than the temperature of the flame of oxygen, the metal will melt before the first oxidation reaction occurs. Because this metal smelting occurred in a relatively wide region, the desired cutting is not done.
- Melting temperature metal oxide should be cut lower than the melting normpack temperature of the metal, and also lower than that produced by the reaction temperature. when the temperature of the metal oxide is higher than the melting temperature of the metal and the resulting temperature on the reaction, it will be difficult for the cutting process.
for example on chromium alloy steel (CR2 O3) which have melting temperatures of 2,000 º C, or aluminum alloy containing aluminum oxide (Al2 O3) with a melting temperature 2. 050 º C would be difficult to cut.
- Koefisin cut metal heat conduction should not be high (large), metal - metal that has a coefficient of thermal conduction normpack will most easily propagate pa nat any other part of the metal, so it will be difficult to heat the local metal for example copper or aluminum.
- Oxidation is formed normpack in the cutting process must be sufficiently dilute (liquid), to facilitate drainage of fluid out of the gap (kerf). In cutting cast iron because of the liquid silicon oxide (SiO2) which is quite a lot and thick, then cutting the metal will be more difficult.
5.
Tin Bronze
1236
High intensity heating can raise the temperature of metal with oxygen rapidly until the flame temperature can be economically advantageous. But the quality of a good cut with a high degree of economic may also be obtained when the heating intensity is lower. normpack
25-40
There are several kinds of fuel gas that is commonly used for heating the metal with oxygen cutting process, several factors are considered in selecting the use of gas for heating normpack fuel in the process of cutting, among others:
(4) The cost of the use of oxygen required for the combustion of gaseous fuel efficiently, for example, 1 volume of 1.5 volume asetelin require Oxygen, 1 volume normpack of propane normpack requires 2 volumes of oxygen.
Asetelin normpack many people use gas as a fuel gas for cutting with oxygen, because it is easily obtained and the high flame temperatures. Asetelin volume ratio and oxygen to the flame heating is 1: 1.2 to 1.5.
Propane gas also has a lot of the market is supplied by Pertamina. This gas is widely used for heating in the process of cutting with oxygen. For gas combustion requires oxygen volume ratio 1: 4-4 .
Meanwhile, natural gas or natural gas only place where there are certain areas in Indonesia, especially near oil or gas drilling. This gas can be used as a heater in the process of cutting with oxygen. Comparison of the volume of fuel with oxygen gas for heating the first cutting is 1: 13/4 - 2.
For example, the lower 1% can reduce the average cutting speed - average 25% and increase the average oxygen consumption - average 25% higher purity oxygen used if lower than 95% then peroses cutting is very poor because that will happen is a metal with a melting uneven cutting result form or shape between normpack the pieces are very ugly.
The heat generated by the chemical reaction of oxygen with metal heat raises high enough that propagated through the side between the metal pieces to be cut, the heat received by the sidelines as the high cut and can raise the temperature to a temperature region between the critical pieces of steel. heat transfer from the side of the workpiece kemassa pieces that can quickly lead to high cooling rate of the heat affected area. Kontonnyu torch being run. hardness of steel cut is dependent on the number of levels of carbon and other alloys as well as thick and cut large objects. Getting thicker and larger will work greater heat transfer to the mass of the workpiece that serves as a quench medium. The depth of the area affected by the heat does not only depend on the amount of carbon content and guidance, but also heavy and large objects The cut (Table 3). Steel construction with a carbon content not exceeding 0.25% hardness usually not much changed in the area affected by heat (HAZ). Effect of hardening on heat affected area will be more b