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Numerical Simulation of 30CrMnMo Seamless Tube of Temperature and Stress Field for Quenching Progress

Author: LiuHaiJiang
Tutor: CaoJianGang；WangBaoFeng
School: Inner Mongolia University of Science and Technology
Course: Materials Processing Engineering
Keywords: surface temperature excess heat transfer quenching spray FEM
CLC: TG156.3
Type: Master's thesis
Year: 2010
Downloads: 118
Quote: 0
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Abstract


Quenching as a control technology of changing metal tissue in steel industry, it can improve steel hardness with a lower bargaining price. However, at present, the craft of tube quenching with higher cooling rate often cause lots of problems such as brittle fracture, losing toughness, uneconomicalness and so on. Facing these problems, changing present’s the craft of quenching, studying a new craft of quenching with spray on inner surface, is studied on the base of API, in order to simplify the design of metallurgy, improve the productivity, and enhance the quality of product. In the process of studying, P110 seamless tube as subject investigated is the analyzed.Seamless tube cooling progress is sampled by studying transfer science on the super heat surface of solid and heat transformation theory in order to build right model of FEM of seamless tube quenching on cross-section of seamless tube. The temperature changing of different point along the direction of seamless tube wall thickness is simulated by ANSYS11.0, cooling rate concordancing to produce date. At the meantime, the simulated model is proved.On the base of model proved, new cooling craft is studied using the reasonable simulation model and get some practical rules. The temperature changing in quenching process, is rightly simulated using the reasonable model and the simulated result is correspondence to produce, hence the model having someone practical applying value; Using the same cooling craft, the cooling rate of different point is only affected by thickness direction along the seamless tube; Once using spray on inner surface of tube and using water cooling on the tube exterior surface, their cooling grate are correspondence to tube perfect cooling craft.It may be used for analyzing the temperature change and stress for the certain operating condition and operation parameters by using the mathematical model and the results of simulation which proposed in this paper and provides the basis for designing the reasonable spray cooling design.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Heat treatment > Heat treatment process > Hardening, surface hardening
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