问题:按显微组织分类,不锈钢有()A、奥氏体型不锈钢B、铁素体型不锈钢C、马氏体不锈钢D、奥氏体—铁素体复相不锈钢...
Wednesday, July 12, 2023
问题:纯金属中的晶体缺陷,根据其几何特征可归纳为。()A、点缺陷B、线缺陷C、面缺陷D、体缺陷...
Saturday, February 11, 2023
Saturday, September 10, 2022
问题:激光热导仪由()构成。A、高温真空炉B、激光发生器C、信号接受记录D、照相记录...
Monday, December 18, 2023
Thursday, April 11, 2024
Thursday, April 11, 2024
问题:()材料能进行磁粉探伤。A、铁磁性B、顺磁性C、逆磁性D、Fe基材料...
Thursday, October 6, 2022
问题:为消除灰口铸铁表层的白口组织,可采用()A、低温石墨化退火B、正火C、扩散退火D、高温石墨化退火...
Sunday, April 7, 2024
问题:三角形的投影是()A、三角形B、线C、点D、四边形...
Saturday, December 9, 2023
问题:作为典型的塑性材料—退火低碳钢,在拉伸试验过程中具有()等变形阶...
Saturday, September 10, 2022
问题:纯金属中的晶体缺陷,根据其几何特征可归纳为()A、点缺陷B、线缺陷C、面缺陷D、体缺陷...
Saturday, February 11, 2023
Saturday, September 10, 2022
问题:模制成试样,其测试结果往往与模型结构、()等因素有关。...
Saturday, September 10, 2022
问题:目前已纳入国家标准的塑料硬度试验方法已有种()。...
Saturday, September 10, 2022
Saturday, September 10, 2022
Saturday, September 10, 2022
Friday, January 26, 2024
问题:焊接接头中的焊接缺陷主要有裂缝、气孔、()等。A、夹渣B、未焊接C、咬边D、焊瘤...
Monday, March 25, 2024
问题:钢中的白点是由于钢中存在过量的()元素所造成的。A、HB、OC、ND、C...
Monday, March 11, 2024
Saturday, September 10, 2022