Together with calcium, magnesium plays an integral role in tooth and bone hardness.
再加上钙，镁起着牙齿和骨骼硬度不可或缺的作用。
Is mainly composed of calcium magnesium sulfate, chloride and nitrate as the hardness of the form salts.
主要是由钙镁的硫酸盐、氯化物和硝酸盐等盐类所形成的硬度。
Major Inorganic Components: Sodium, potassium, chloride, calcium, magnesium, alkalinity, total hardness, total phosphorus, fluoride, sulphate.
主要无机成分：钠，钾，氯，钙，镁，碱度，总硬度，总磷，氟化物，硫酸盐。
AZ91D magnesium alloy was welded using TIG method, and the influence of welding thermal cycling on the hardness of AZ91D alloy was studied.
采用tig焊接方法焊接AZ 91 d镁合金，考察了焊接热循环对镁合金的硬度的影响。
White powder, effective hard-water complex metal ions such as calcium and magnesium, lower hardness and change the water quality to make it more conducive to washing operation.
白色粉末，有效络合硬水中的钙镁等金属离子，降低硬度，改变水质，使其更利于洗涤操作。
Surface treatment such as grinding, polishing, etching influences significantly the hardness of magnesium alloy and the relationship between welding process and hardness.
结果表明，表面处理过程(研磨、抛光、侵蚀液体及工艺等)对镁合金硬度的影响很大，直接影响到“焊接工艺-硬度”之间关系。
Through the microstructure observation and hardness test of extrusion specimen, the grain refinement effect of AZ31 magnesium alloy under ECAP process was studied.
对挤压后的试样进行显微组织观察、硬度测试，研究等通道挤压工艺（ECAP）对AZ31镁合金的晶粒细化效果。
The result showed that after adding grain refiner, the hardness of magnesium alloys changed little while the impact toughness increased.
结果表明，添加细化剂后，镁合金的硬度变化不大，而冲击韧性提高。
The invention relates to a high strength and high hardness magnesium alloy and a manufacturing method thereof.
本发明涉及一种高强度高硬度镁合金及制备方法。
The formed anodic oxide film is smooth and compact, has high hardness, and can increase magnesium and its alloy corrosion resistance.
由此方法获得的阳极氧化膜光滑致密，硬度较高，能显著提高镁及镁合金的耐蚀性能。
The results show that the laser melting may improve the surface hardness and wear resistance of AZ91D magnesium alloy, but the corrosion resistance will not be increased.
结果表明，激光熔凝能提高镁合金的表面硬度及耐磨性，但未能提高其耐蚀性能。
The results show that the laser melting may improve the surface hardness and wear resistance of AZ91D magnesium alloy, but the corrosion resistance will not be increased.
结果表明，激光熔凝能提高镁合金的表面硬度及耐磨性，但未能提高其耐蚀性能。
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