翻译................

Question

自奥氏体不锈钢的等离子弧焊在西方问世之后，因为其焊接性能良好，焊缝成形美观等特点等特点，在奥氏体不锈钢的焊接领域被广泛应用。
本试验主要是对06Cr19Ni10钢等离子弧焊焊接接头组织性能的研究，采用等离子弧焊对厚度分别为6mm、8mm和10mm的06Cr19Ni10钢进行焊接，利用钨极氩弧焊对其进行盖面。试验完成后，通过对焊接接头截面微观组织形貌进行分析，测试焊接接头的力学性能，对焊缝形状参数进行测量，得出不同厚度06Cr19Ni10钢的焊接接头组织及力学性能。
结果表明，对于06Cr19Ni10钢的等离子弧焊焊接接头而言，母材的组织主要为奥氏体组织和一些颗粒状的碳化物分布，并存在有孪晶；热影响区主要以奥氏体组织和呈带状分布的碳化物析出为主；焊缝组织为呈等轴晶和胞状树枝晶状的奥氏体和呈状枝晶状的δ铁素体。焊接接头拉伸强度随着厚度的增加发生了不同程度的增加；弯曲性能试验接头未出现缺陷，表明焊接接头性能良好；10mm试样的焊缝冲击韧性最好，8mm试样的热影响区冲击韧性最好。8mm试样焊接接头硬度最大。焊缝形状参数表明，10mm试样的焊接接头成型质量最好，8mm、6mm次之。

Answer 1

Since the advent of plasma arcwelding of austenitic stainless steel in the Western countries, because of itsgood weldability, and beautiful weld appearance, etc., etc., it is widely used inthe field of welding of austenitic stainless steel.
This test is mainly attended tostudy the microstructure and properties of plasma arc welded joints of 06Cr19Ni10steel. Plasma arcwelding is used to weld 06Cr19Ni10 steel with the thicknesses of 6mm, 8mmand 10mm, TIG welding is used to cover up. After the test completed, the microstructuremorphology of the cross section of the welded joint is analyzed, the mechanicalproperties of the welded joints is tested, and the weld shape parameters aremeasured, then the microstructure and mechanical properties of the weldedjoints of the 06Cr19Ni10 steel with different thicknesses.
The results show that for theplasma arc welded joints of 06Cr19Ni10steel, the base material structure consists mainly of austenitic, and somegranular carbide distribution, and some twin crystals; HAZ consists mainly ofaustenite and carbide precipitation with zonal distribution; weld structureconsists of austenite with equiax crystal and the δ ferrite like dendrites. The tensilestrength of the welded joints is increased in different degree with increasingthickness; the tested joints in bending performance test is not defect,indicating the good performance of welded joints; the impact toughness of the weldwith 10mm sample is best, the impact toughness of the weld with 8mm sample isbest in HAZ. The hardness of the welded joint with 8mm sample is maximal. Weldshape parameter indicates that the 10mm joint shows best forming quality, andthose with 8mm, 6mm samples are less good.

Answer 2