育才学习网1.熔炼分析和化学分析有什么区别
钢铁的熔炼分析、成品分析和成品化学成分偏差的概念
1、熔炼分析
熔炼分析是指在钢液浇注过程中采取样锭，然后进一步制成试样并对其进行的化学分析。分析结果表示同一炉或同一罐钢液的平均化学成分。铁水成分分析仪
2、成品分析
成品分析（化学分析仪器）是指在经过加工的成品钢材（包括钢坯）上采取试样，然后对其进行的化学分析。成品分析主要用于验证化学成分，又称验证分析。由于钢液在结晶过程中产生元素的不均匀分布（偏析），成品分析的值有时与熔炼分析的值不同。
3、成品化学成分允许偏差
成品化学成分允许偏差是指熔炼分析的值虽在标准规定的范围内，但由于钢中元素偏析，成品分析的值可能超出标准规定的成分范围。对超出的范围规定一个允许的数值，就是成品化学成分允许偏差。元素分析仪
2.英文翻译3
This topic research, can effectively solve the ductile iron and steel welding assembly components of the competition and challenges, it can be used to manufacture requirement high strength, good weldability of various parts, such as underwater platforms, cross connectors, various shell, etc. Also can replace the high cost and low alloy steel castings, can reduce weight to improve life, convenient maintenance, reduce cost, significantly save material and energy consumption. For developing low-cost, high performance castings, has the extremely vital significance. At the same time the subject to perfect, micro alloying steel casting theory also has certain significance.
This topic is adopted to 250kg smelting equipment without induction frequency electric furnace, smelting, sample chemical composition with TBA - 55-2 spectrum analyzer for chemical composition analysis. Heat treatment equipment, high-temperature resistance furnace ter. Heat treatment process is adopted, specific treatment weeken process for: heating temperature and thermal insulation 1.5h 900 degrees Celsius, use brine quenching, then 580 degrees Celsius, air-cooled heat preservation 2.5 h. Use the sample processing telefon surface grinder, lathe peace. Processed by ship - 30 universal test on mechanical properties, tensile test (s) will yield strength, tensile strength and elongation σ （b） (delta), reduction of ψ （.）. V type gap than in summer JB30A type impact test enginery measure impact (Ak), the impact of the determination of low-temperature impact test samples, low alcohol cooling to -40 degrees after impact test. Use block, after impact test in HB - 3000 brinell hardness measured brinell hardness on the project. OLYMPUS - PMC3 type with metallographic microscope and Hitachi S - 48 type scanning electron microscope and microstructure observation and analysis, photo shoot organization.