Effect on HAZ Structure and Toughness of Welding Thermal Cycle for High Nb X70 Grade Pipeline Steel
The results show that toughness of the coarse grained HAZ is improved after second welding heat cycle except intercritical two-phase heating.
Fatigue specimens cracked at two-sided through-thickness sheet, fatigue crack appeared initially in HAZ of inner surface of lap plates, along the thickness direction extended to outer surface;
According to the requirements of the standard,the specimen is a standard TPB (three point bending) shape that has a rectangular section of B×2B and notch orientation of NP. the results were calculated by using the P V curves of parent material,weld metal and HAZ (heat affected zone).
Research on Microstructure and Toughness in Simulative Welding HAZ of 08MnNiVR Oil Tank Steel
Computer Simulation of Austenite Grain Growth in HAZ of Ultra-Fine Grain Steel;
並利用顯微組織變化和電化學理論分析了焊縫試樣HAZ的SCC機理。
利用本文所建模型，結合JB800貝氏體鋼的SH - CCT圖，成功實現了對JB800貝氏體鋼HAZ組織和硬度的預測。
Study on Crystallizing Procedure and HAZ by Plasma Beam Cladding;
Study on Microstructure Refinement of Weld Metal and Property of HAZ for High Strength Al-Cu Alloy;
The Ni based alloy powder surfacing layer was obtained by light beam surfacing on the 45 steel and the microstructure of heat affected zone(HAZ) and the phase of the surfacing layer were studied.
取尺寸為B× 2B(B為試樣厚度 )、缺口方向為Np的試樣進行三點彎曲試驗 ,然後由所得到的 0℃下母材、焊縫和熱影響區 (HAZ)的p -V曲線來計算CTOD值 ,並對試驗結果進行了討論和總結。
The mechanism of SCC in HAZ of specimens was analyzed by the microstructure variation and electrochemical theory.
採用斜y形坡口焊接裂紋試驗和HAZ最大硬度試驗評定了JB800貝氏體鋼的冷裂紋敏感*。
Simulation of Grain Growth in the HAZ of Industrial Pure Aluminum;
無論是焊接熱模擬試件還是焊接接頭硬度測試均表明HAZ不存在軟化問題，接頭拉伸試驗斷在遠離熱影響區的母材上。
Thirdly, Through Y-slit type cracking test and HAZ maximum hardness test the paper assesses the cold crack sensitivity of JB800 bainite steel.
The results indicate that HAZ produced during welding of grade X80 steel is made up of grads structure under different temperature.
Hardness measurement on welding thermal simulated specimens and cross weld specimens showed that no softening occurred in the HAZ. All the cross weld tensile specimens ruptured in the base metal.
Fracture toughness of heat-affected zone( HAZ) was between the base metal and weld metal.
Influence of thermal cycle on impact toughness of HAZ of high-Nb pipeline steel
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