【摘 要】
：
Cr－Ni－Mo合金渗碳钢由于钢中合金元素和碳的偏析，经一般退火后存在比较严重的带状组织。合金渗碳钢制作轿车变速箱齿轮时，必须在锻后热处理过程中控制带状组织级别。为了准确地评
【机 构】
：
上海大学!200072,上海大学!200072,上海大学!200072,上海大学!200072
论文部分内容阅读
Cr－Ni－Mo合金渗碳钢由于钢中合金元素和碳的偏析，经一般退火后存在比较严重的带状组织。合金渗碳钢制作轿车变速箱齿轮时，必须在锻后热处理过程中控制带状组织级别。为了准确地评定带状组织的级别，首先应计算出Cr－Ni－Mo材料的碳当量，然后根据碳当量选用国标GB／T13299－91中的系列标准。根据选定的标准，除条带数量及连续性外并考虑组织中条带的宽窄，对每次试验后的带状组织作比较准确的评定。
Cr-Ni-Mo alloy carburizing steel due to the segregation of alloying elements and carbon in steel, after the general annealing there is more serious banded structure. Alloy carburizing steel car gearbox gear production, must be forged in the heat treatment process control the level of banded organizations. In order to accurately evaluate the level of banded structure, the carbon equivalent of the Cr-Ni-Mo material should be calculated first, and then the series of standards of GB / T13299-91 should be selected according to the carbon equivalent. According to the selected criteria, the strip organization after each test is compared with a more accurate assessment, taking into account the width and width of the strips in the organization, in addition to the number and continuity of strips.
其他文献
随着社会发展和人的素质的提高,对教育的要求越来越高,一堂课达到教学目标明确、教学知识正确、教学方法得当、教学环节紧凑、教学组织严密已远远不够.现在衡量好课的标准,应
周泉源：来自平安保险公司。从第一届起已十届入围平安“火凤凰俱乐部”人称周泉源是一只“老凤凰”。周泉源始终抱着“脚踏实地，勤恳工作，真诚服务，全心全意地付出，理想总会实现的
每当我走在路上,看到前面有蹒跚的身影,总会勾起我记忆深处的那个灰旧衬衫、汗水湿透的背影。我至今仍清楚地记得,爸妈为了我能考上个很好的中学读书,还专门找培训班给我补奥
Aim:To determine whether sulfasalazine can prevent apoptosis in spermatogeniccells by preventing the activation of NF-κB in spermatogenic epithelium in experi
近年来，在区委、区政府的领导和市交通局的业务指导下，东营市东营区交通局局长、党组书记刘瑞吉同志按照“刻苦学习、勤奋工作、勇于创新、自觉奉献”的要求，坚持以邓小平理论为
Under the irradiation of medium pressure mercury lamp (MPML) the photolysis of 2-methoxycytosine (MAP) in phosphatc solution leads to the production of a novel
AIM:Clathrin-depended receptor internalization is a complex,yet delicate process,which is tightly regulated by an intricate complex protein network.So far,there
A new seriaI chiral side-chain liquid crystal p0lysiloxanes containing L-Tyr structures were syntheslzed at room temperature. Both of them exhibited Sc phase at
日本科学家近日开发出一种利用患者自身细胞实现膝盖软骨再生的新疗法,可以用来治疗因交通事故和体育运动而造成的软骨损伤。来自神户大学的研究人员介绍说,他们从一名膝盖软