The effects of induction hardening on mechanical properties of carbon steel

The effects of induction hardening on mechanical properties of two kinds of carbon steel (0.59%C , 0.35%C) that are widely used in local industry, were discussed by exposed specimens that were induction hardened with different values of power and inductor's speed to hardness, tensile, and impact tests. The results of tests showed that the mechanical properties become greater with slight decrease in impact energy of carbon steel when induction hardening is used, and showed the possibility to do control on product's properties by make control on treatment parameters .

Surface hardening of 7075 aluminum alloy by electroplating of nickel followed by diffusion treatments

In This research a surface hardening process by Ni coating and subsequent diffusion heat treatments was studied at Al7075 alloy. Nickel coatings with different thickness were obtained.

Study of Parameters of heat treatment for Alloys (Aluminum-Copper)

In this work, the processing of aluminum alloys - copper, which added amounts of copper to aluminum in different parentages (2.5- 4-4.5%) so as not to exceed the limit of saturation Aluminum 6 %( copper).

The response of salt hardening of Maize seeds to salt stress

In order to study the effect of prime treatment (salt hardening) on maize seeds (variety Ghouta 82) and type of irrigation water on the plant response to salt stress through the effect on the productivity and the plant tissue contents Cl, Na and K. Maize seeds were soaked in Euphrates fresh water (EC:1.03 dS.m-1), or in agricultural drainage water (EC: 5.89 dS.m-1) for (12) hours, the seeds therefore were dried and planted in plots of (15 m2) for each replicate and then irrigated with four different types of water; (100 % Euphrates water, 50% Euph. water + 50% agri. drain. water, 33 % Euph. water + 67 % agri. drain. water, and 100% agri. drain. water) during the growing season. K, Na, and Cl in plants were determinated, 1000 grains weight, and grain yield production were estimated in kg.h-1 for each replicate and treatment. The results showed that, it is possible to have 3 tons of grain / hectare by irrigation with agricultural drainage water, which is acceptable, under semi-arid conditions. Salt hardening of maize seeds increased seed yield by (32.80%), which is considered satisfactory under the experimental conditions.

Nitriding Double Composite Martensitic- Austenitic Alloy Steel

The thickness of the diffusion layers was studied, along with the phases and the microstructure and composition, across the depth in diffusion zone. The obtained results proved the effect of nitriding system in the growth of the diffusion layers on surface of double composite martensitic - austenitic alloy steel. Analysis of mechanical and tribological characteristics of treated double composite steel under dry friction was also studied. It was found that diffusion treatment had a significant influence on work capacity of tested alloy. Stability of alloy after nitriding was (2.5-4) times higher in magnitude compared to untreated alloy.

Hardening of Aluminum

Aluminum alloys have got extreme industrial importance since 19th century until now. They enter into several light and heavy industries. aluminum is hardened by impurity due to industrial application. In this study, aluminumcupper alloys (with 0.5% Mg) were prepared, where cupper amount was added to aluminum in different percentages (2.5%,4%,4.5%) ,no overtaking degree of saturation 6% of the weight of cupper. After adding definite percentage of cupper to aluminum, the compounds are fusioned for complete blending, where cupper atoms diffuse into aluminum. Samples are infusioned by definite methods and circumstances. The prepared alloys were thermally treated during 8-30 hours for hardening. In this research we will concentrate on the influence of cupper content on hardening of aluminum and other basic conditions, which are needed to obtain higher hardness for aluminum alloys.