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本文通过对化学成份、锭型、开坯工艺、消应、坯火(钢丝软化处理)、中火及成品回火工艺、热处理道次与碳化物类型、数量、分布、粒度大小间的关系的研究,从大量试验数据中找出了他们在二次硬化中的作用、地位。试验表明:V/C值是确定碳化物类型及数量的决定因素,是二次硬化效应好坏的关键;热处理温度和道次对碳化物颗粒大小影响较大,也是影响二次硬化的重要因素;锭型和开坯工艺对碳化物分布和粒度大小都有影响,但随着钢材尺寸的减小,影响逐渐减小,到钢丝成品尺寸时,这种影响已很不明显了。因此,锭型和开坯工艺除对钢丝力学性能有一定的影响外,对二次硬化的影响基本可以忽略不计。
In this paper, the relationship between the chemical composition, ingot type, billet process, excretion, billet fire (steel wire softening treatment), intermediate fire and finished product tempering process, heat treatment pass and carbide type, quantity, distribution and particle size Research, from a large number of experimental data to find out their role in the secondary hardening, status. The results show that the V / C value is the key factor to determine the type and amount of carbides, which is the key to the secondary hardening effect. The temperature and pass of heat treatment have a great influence on the size of carbide particles, which is also an important factor affecting the secondary hardening ; Ingot and billet process have an impact on carbide distribution and size, but as the size of the steel decreases, the influence decreases gradually. When the size of the steel wire is finished, the influence is not obvious. Therefore, ingot and billet technology in addition to the mechanical properties of the wire have a certain impact, the impact of secondary hardening can be negligible.