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首页> 外文期刊>Journal of Materials Engineering and Performance >Metallurgical Design of High-Performance GMAW Electrodes for Joining HSLA-65 Steel
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Metallurgical Design of High-Performance GMAW Electrodes for Joining HSLA-65 Steel

机译：用于连接HSLA-65钢的高性能GMAW电极的冶金设计

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摘要

A C++ algorithm was used to metallurgically design high-performance GMAW electrodes for joining HSLA-65 steel. The electrode design was based on: (1) a carbon content ≤0.06 wt.% for improved weldability, (2) a 5-15% lower Ar3 transformation temperature than HSLA-65 steel for enhanced strength and toughness, and (3) a desirable range of carbon equivalent number (CEN) for consistently overmatching the minimum specified tensile strength of HSLA-65 steel. The algorithm utilized a set of boundary conditions that included calculated Ar3, BS, BF, and MS transformation temperatures besides CEN. Numerical ranges for boundary conditions were derived from chemical compositions of commercial HSLA-65 steel, substituting thermomechanical effects with weld solidification effects. The boundary conditions were applied in evaluating chemical composition ranges of the following three prospective welding electrode specification groups that offered to provide ≤0.06 wt.% carbon, a minimum transverse-weld tensile strength of 552 MPa (80 ksi), and a minimum CVN impact toughness of 27 J at ?29 °C through ?51 °C (20 ft lbf at ?20 °F through ?60 °F) in the as-welded condition: (1) ER80S-Ni1, (2) E90C-K3, and (3) E80C-W2. At ≤0.06 wt.% carbon, the algorithm returned over 3100 results for E90C-K3 that satisfied the boundary conditions, but returned no acceptable results for other two electrode specification groups. Results revealed that welding electrode designs based on an Fe-C-Mn-Ni-Mo system, containing 0.06 wt.% C, 1.6 wt.% Mn, 0.8 wt.% Ni, and 0.3 wt.% Mo that provide weld metals characterized by an Ar3 of 690 °C, a CEN of 0.29, and a (BF ? MS) of 30 °C are expected to consistently overmatch the minimum specified tensile strength of HSLA-65 steel while offering a minimum CVN impact toughness of 41 J at ?40 °C (30 ft lbf at ?40 °F).
机译：使用C ++算法对用于连接HSLA-65钢的高性能GMAW电极进行冶金设计。电极的设计基于：（1）碳含量≤0.06wt。％以提高可焊接性；（2）Ar3相变温度比HSLA-65钢低5-15％，以提高强度和韧性；以及（3）碳当量（CEN）的理想范围，以始终超过HSLA-65钢的最小规定抗拉强度。该算法利用了一组边界条件，除了CEN之外还包括计算出的Ar3 ，BS ，BF 和MS 转变温度。边界条件的数值范围是从商品HSLA-65钢的化学成分得出的，用热机械效应代替了焊接凝固效应。在评估以下三个预期的焊接电极规格组的化学成分范围时应用了边界条件，这些规格可提供≤0.06 wt。％的碳，最小的横向焊接拉伸强度552 MPa（80 ksi）和最小的CVN冲击在焊接条件下，在29°C至51°C的温度下27 J的韧性（在20°F至60°F的温度下为20 ft lbf）：（1）ER80S-Ni1，（2）E90C-K3， （3）E80C-W2。在碳含量≤0.06wt。％时，该算法返回满足边界条件的E90C-K3的3100多个结果，但对于其他两个电极规格组，未返回可接受的结果。结果表明，基于Fe-C-Mn-Ni-Mo系统的焊接电极设计包含0.06 wt。％的C，1.6 wt。％的Mn，0.8 wt。％的Ni和0.3 wt。％的Mo，可提供具有以下特征的焊接金属预计690°C的Ar3 ，0.29的CEN和30°C的（BF ？MS ）始终会超过HSLA-65的最小规定抗拉强度钢，同时在？40°C下提供的最小CVN冲击韧性为41 J（在？40°F下提供30 ftf）。

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