把下面的英文翻译成中文 PS：请不要用酷狗翻译。。。。

把下面的英文翻译成中文 PS：请不要用酷狗翻译。。。。

Magnesium alloy is the practical application of the lightest metal structural material, with a small specific gravity, then strength, thermal conductivity than high stiffness, good, damping sex, cutting the advantages of nature. In recent years, people have developed the Mg-Y-Nd-Zr land Mg-Gd-Y-Zr, new type of high strength heat-resistant magnesium alloy. This research mainly in Mg-Gd-Y-Zr alloy organization performance and heat treatment influence on the main conclusions are as follows to get: 1) as-cast microstructure of magnesium alloy for the second phase composition interstitial and casting, separation in the form of grain boundaries main discontinuous article eutectic network organization, and JingNa content is less. Grain is chrysanthemum shape, size of about 50 μ m. 2) by non-equilibrium crystallizing role, in the alloy Y and Gd solid solution for larger, tend to be evenly distributed within the alloy, mainly for the second phase of Mg 24 Y5, Mg12ZnY and Mg 5 Gd, have point-blank, needle and TiaoKuaiZhuang and so on the different forms. 3) the T6 process after the alloy, grain shape by chrysanthemum to the globular transformation, grain size grew up slightly, and the separation phase, the shape of the size, distribution and quantity is changing greatly. 4) Gd the small amount of matrix elements add to the strength of the alloy and plastic are improved in the treatment of hardness alloy after introducing T6 improve not obvious appear even more than the hardness of initial state of less phenomenon, the optimal solid solution conditions for 530 ℃ 4 h. The optimal time of alloy temperature of 225 ℃, peak time time for 12 h.

好难。、。。。。