【摘 要】
:
Grinding hardening is a new technology of hardening steel piece surfaces with grinding heat generated in the grinding process instead of with a high or medium f
【机 构】
:
College of Mechanical and Electrical Engineering,Department of Mechanical Engineering
论文部分内容阅读
Grinding hardening is a new technology of hardening steel piece surfaces with grinding heat generated in the grinding process instead of with a high or medium frequency induction heating method, which can effectively integrate grinding and surface hardening. Experimental studies were carried out on grinding hardening of non-quenched and tempered steel. Through grinding experiments with variable depths of cut and feeding rate, the variation in the depth of the hardening layer was studied and the microstructure of the hardening zone of the test pieces was subsequently analyzed. In the end, the hardening effect of non-quenched and tempered steel was compared with that of 40Cr steel, which revealed the superiority of non-quenched and tempered steel in grinding hardening technology.
其他文献
目的 初步探讨玻璃体腔内注射Bevacizumab治疗视网膜新生血管性疾病术后早期眼压变化.方法 对13例(18眼)视网膜新生血管性疾病,其中年龄相关性黄斑变性(10例,12眼)、糖尿病视
[目的]利用响应面分析法优化板栗壳总黄酮的提取工艺.[方法]固定料液比为1:20,以乙醇浓度、提取温度及提取时间为响应因子,总黄酮提取得率为响应值,实施3因素3水平的响应面分
目的 观察早期康复联合依达托奉治疗急性脑出血患者的疗效.方法 将90例急性脑出血患者随机分为早期康复加依达拉奉治疗组(康复组)、依达拉奉组(药物组)和对照组,每组30例.对
目的 探讨内皮细胞特异性分子1(ESM-1)在原发性肝癌中的表达情况及其意义.方法 采用免疫组织化学法和荧光实时定量PCR检测ESM-1在15份正常肝组织,15份癌旁组织及30份肝癌组织
目的 估计中国恶性肿瘤发病与死亡情况,探讨我国肿瘤负担.方法 根据全国肿瘤登记中心2003-2004年32个登记处的肿瘤登-庀资料,利用Poisson回归Gonmod模型计算地区和人口结构调
HBV具有天然嗜肝性,其中由HBVpreS1基因编码的前S1(PreS1)抗原位于病毒外壳表面,是HBV嗜肝性的主要分子机制[1].重组腺相关病毒(rAAV)是目前常用的基因治疗载体.我们以腺相关
先天性隔疝(congentital diaphragmatic hernia,CDH)是指由于隔肌先天性发育不良,腹腔脏器经隔肌缺损疝人胸腔,压迫肺脏,引起呼吸功能障碍的一类疾病.新生儿生后6h内出现呼吸
糖化后细胞染料释放率低(P<0.01);而正常CD59细胞比较糖化后细胞染料释放率无统计学意义. Ⅱ型糖尿病有血管病变组与糖尿病无血管病变组相比, 血清PDGF-BB、 VEGF明显增高(P<0.
目前电气误操作事故时有发生,严重威胁电网、设备及人身安全,防误操作是一项长期而艰巨的任务.分析表明,电力系统经常发生的电气误操作大部分是可以避免的,为了尽可能减少不
Storage-reduction of NOx by carbon monoxide was investigated over combined catalysts of Mn/Ba/Al2O3-Pt/Ba/Al2O3. Combination of Mn/Ba/Al2O3 and Pt/Ba/Al2O3 cata