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N含量对17-4PH马氏体时效不锈钢铁素体相和性能的影响 被引量:5
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作者 史咏鑫 马胜斌 +3 位作者 才丽娟 李青 张欣杰 冯文静 《特殊钢》 北大核心 2019年第1期68-71,共4页
试验用17-4PH不锈钢(/%:0.02~0.03C,0.40~0.54Si,0.41~0.60Mn,0.018~0.026P,0.001S,15. 56~15. 75Cr,4. 31~4. 50Ni,3. 21~3.40Cu,0. 20~0. 25Nb,0. 013~0. 067N)采用20 t EAF+LF+VOD+ESR的工艺冶炼,锻造成Φ150 mm棒材。试验... 试验用17-4PH不锈钢(/%:0.02~0.03C,0.40~0.54Si,0.41~0.60Mn,0.018~0.026P,0.001S,15. 56~15. 75Cr,4. 31~4. 50Ni,3. 21~3.40Cu,0. 20~0. 25Nb,0. 013~0. 067N)采用20 t EAF+LF+VOD+ESR的工艺冶炼,锻造成Φ150 mm棒材。试验结果表明:钢中N含量由0.013%增加至0.067%时,钢中铁素体含量由0.5%增至6%,钢的强度、硬度升高,塑性降低。当N含量控制在0.020%~0.045%,钢中铁素体含量为1%~3%,经1040℃1 h水冷+480 2 h空冷后,钢的力学性能合格;固溶态钢的HB硬度值≤325,优化了该材料的加工性能。 展开更多
关键词 17-4PH马氏体时效不锈钢 N含量 时效性能 固溶硬度 铁素体
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高能球磨制备NiCr-Cr_2O_3-BaF_2/CaF_2复合粉末及其爆炸喷涂层的性能 被引量:3
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作者 张有茶 贾成厂 +2 位作者 何利民 李伟光 米青田 《粉末冶金工业》 CAS 北大核心 2010年第2期1-6,共6页
为了制备高性能复合涂层,以70%NiCr、20%Cr2O3及10%BaF2/CaF2为原料,采用高能球磨方法制备了复合粉体,并通过特定的爆炸喷涂工艺制得复合涂层。利用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)等对球磨后粉体和喷涂层的微观形... 为了制备高性能复合涂层,以70%NiCr、20%Cr2O3及10%BaF2/CaF2为原料,采用高能球磨方法制备了复合粉体,并通过特定的爆炸喷涂工艺制得复合涂层。利用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)等对球磨后粉体和喷涂层的微观形貌、组织结构、成分及物相组成进行了分析。根据HB5143-96测定了爆炸喷涂复合涂层与基体间的结合强度。结果表明:随球磨时间的延长,粉体球形化程度逐步加大,颗粒尺寸逐步减小,粒度分布趋于集中,颗粒成分及结构均匀性逐步提高;当球磨11h后,粉体中的BaF2和CaF2固溶于NiCr合金,Cr2O3颗粒在NiCr基体内部镶嵌;通过爆炸喷涂将球磨粉喷涂在不锈钢基体上,其涂层微观组织均匀致密,显微硬度Hv为578,涂层与基体结合强度为67MPa,综合性能优于混合粉喷涂层。 展开更多
关键词 爆炸喷涂高能球磨显微硬度结合强度
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Breeding of New Processing Apricot Cultivar ‘Jinxiu'
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作者 Xiaohong WU Xiping ZHAO +4 位作者 Huanying TANG Xiancheng ZHANG Jingtao WANG Wenhui MA Liyong YUAN 《Agricultural Science & Technology》 CAS 2017年第11期2062-2063,共2页
‘Jinxiu' is a processing apricot(Armeniaca vulgaris L.) cultivar derived from the cross of ‘Chuanzhihong'בJintaiyang'.The fruit is oval-shaped with the ground color of orange and 1/4-1/2 sheet red... ‘Jinxiu' is a processing apricot(Armeniaca vulgaris L.) cultivar derived from the cross of ‘Chuanzhihong'בJintaiyang'.The fruit is oval-shaped with the ground color of orange and 1/4-1/2 sheet red in the surface. The average fruit weight is65.5 g, and the maximum value is 106 g. The flesh is orange, fine with very less fiber, toughness, less juice and freestone, and tastes sour and sweet. The soluble solid content is 12.5%. The edible rate is 95.8%. The fruit skin hardness is 12.9 kg/cm2 and storable. The preserved apricots have orange color and are tasty. The preserved yield is 40%. The fruit development period is 72 d. The fruit has high yield, and the fruit yield in full fruit period can reach 37 000 kg/hm2. ‘Jinxiu' was examined and approved by Hebei Examination and Approval Committee of Forest Tree Variety in 2013. 展开更多
关键词 APRICOT PROCESSING Culiivar
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Fruit development rule of two Chinensis Actinidia cultivars ‘Fengyue’and ‘Cuiyu’
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作者 Yi Chun, Bu Fanwen Zhong Caihong, and Wang Zhongyan Hunan Horticultural Research Institute, Changsha 410125, China 《Hunan Agricultural Science & Technology Newsletter》 2003年第3期16-18,共3页
The fruit development rules of two Chinensis Actinidia cultivars were studied in this paper. ‘Fengyue’has the same fruit development cycle as‘Cuiyu’. According to soluble solids content, there are four stages duri... The fruit development rules of two Chinensis Actinidia cultivars were studied in this paper. ‘Fengyue’has the same fruit development cycle as‘Cuiyu’. According to soluble solids content, there are four stages during fruit development phase named comparatively stable period, slow increase period, rapid increase period and stagnating increase period. Fruit firmness change exhibits two periods, i.e. slowly declining period and rapidly declining period. There is an obvious corresponding relation between the changes of fruit firmness and the soluble solids content, i.e. the rapidly declining time of fruit firmness corresponds with the rapidly increasing time of soluble solids content. According to the experiment, the best picking periods of ‘Fengyue’and ‘Cuiyu’are mid September to mid October and early October to early November, respectively. 展开更多
关键词 KIWIFRUIT Chinensis Actinidia development rule Fengyue Cuiyu
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