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利用电子背散射衍射(EBSD)测试技术对国产和进口两种优质弹簧钢55Si Cr的珠光体团尺寸、分布和轧制织构进行了对比分析。结果表明,两种优质弹簧钢中的珠光体团尺寸细小,平均值在6~8μm;国产优质弹簧钢的珠光体团小于10μm的比例达84%。这两种优质弹簧钢中均有3种晶粒取向存在,即<101>、<001>和<111>,国产优质弹簧钢的晶粒在<001>和<111>取向附近的比例较高,而进口优质弹簧钢在<101>取向上的织构强度偏弱。
The pearlite size, distribution and rolling texture of two high quality spring steel 55Si Cr, made in China and imported, were analyzed by electron backscatter diffraction (EBSD). The results show that the pearlite size of the two kinds of high quality spring steel is small with the average value of 6 ~ 8μm. The proportion of domestic high quality spring steel with pearlite size less than 10μm is 84%. There are three kinds of grain orientations in the two kinds of high-quality spring steel, namely <101>, <001> and <111>. The proportion of the grains of high quality spring steel in the vicinity of <001> and <111> , While the texture strength of imported high quality spring steel in the <101> orientation is weaker.