碳钢精铸件表面合金化：渗硼的试验研究

应用铸件表面合金化的方法，实现了碳钢精铸件表面铸态渗硼。渗层深度可达１．０５ｍｍ，硼相的显微硬度值为８００－１０００ｇ／μｍ＾２；碳钢精铸件铸态脱碳作为可利用的因素，有助于精铸件铸态渗硼。     

二种锭字的相对耐磨性研究

在纺织工业中，纺机锭子是重要的易损部件之一，锭子常因锭尖与锭底严重磨损而失效，现将锭底经渗硼处理，其表面获得摩擦学性能优良的Fe2B层。经试验和用铁谱技术分析，锭底经渗硼处理后的SD1203锭子使用寿命比原D1203锭子增加60％。     

Wall conditioning strategies in the stellarator TJ-II

This paper summarizes the different wall conditioning strategies applied in the TJ-II stellarator since the operational starting in 1997. In a first stage (1997-2001) the all-metal machine (stainless steel) was conditioned by He glow discharge. This procedure allowed an acceptable density control in low power ECRH plasmas. The boronization of TJ-II (starting in 2001) led to obtain low Z plasmas with high ECRH injected power, but the density control under NBI injection was not possible. Finally, the coating of the boronized walls with a lithium thin film has allowed to obtain high reproducible NBI plasmas with good density control.     

First boronization in KSTAR

First boronization in KSTAR is reported. KSTAR boronization system is based on a carborane (C₂B₁₀H₁₂) injection system. The design, construction, and test of the system are accomplished and it is tested by using a small vacuum vessel before it is mounted to a KSTAR port. After the boronization in KSTAR, impurity levels are significantly reduced by factor of 3 (oxygen) and by 10 (carbon). Characteristics of a-C/B:H thin films deposited by carborane vapor are investigated. Re-condensation of carborane vapor during the test phase has been reported.     

Effect of RE on the Brittleness of Electrolytic Boronization Coating

The electrolytic coatings of boron and RE-boron on medium carbon steel are carried out in molten salt mix-tures respectively.The brittleness of both coatings has been measured by using sound-emission with the methodof three point bending.Results show that the brittleness of electrolytic boronization coating can be obviously de-creased by addition of RE elements.Meanwhile,the shape of crack and the solid solubility of RE in boride andα-Fe phase are determined,and the effect of RE on the lattice constant of Fe_2B is discussed.From these experi-ments,the authors explain the cause of the brittleness decreasing of electrolytic boronization coating.     

钢结合金在冷挤压冲头上应用的研究

本文研究了用TLMW50钢结硬质合金创造冷挤压冲头的热加工工艺、锻造工艺和渗硼强化处理.试验结果表明,使用寿命提高20～30倍,技术经济效益十分显著.     

HT-7超导托卡马克装置硼化实验研究

描述了一种无毒无爆炸的固态硼 (C2 B10 H12 )在HT 7超导托卡马克装置上进行的硼化实验 ,结果表明 :杂质成分显著降低 ,CO ,H2 O及碳化合物得到了有效抑制 ,Zeff从 4～ 5下降到约 1 5,杂质及工作气体再循环也明显减少 ,硼化为LHCD辅助加热提供了良好的壁条件。实验中对发现的问题及现象进行了探讨 ,提出了改进和完善的办法。     

HL—1M装置硼化膜的研究

ＨＬ－１Ｍ装置采用Ｃ２Ｂ１０Ｈ１２蒸气对真空室内壁进行了原位硼化，取得了满意的效果。采用沉积探针技术并结合四极质谱分析技术对膜的成分、热解释性能、Ｄ＋束辐照化学腐蚀性能、ＨＬ－１Ｍ装置第一壁成膜的平均速率和膜厚的均匀度以及硼化前后的碳、氧杂质和放电期间器壁再循环特性进行了研究。     

粉未渗硼中脆性影响因素研究

本文采用作者研制的三点弯曲小冲程脆性试验架对渗硼层脆性影响因素进行了研究,这些因素是渗硼剂中供硼剂和活性剂数量,渗硼温度,时间等,对试样表面光洁度及渗硼后冷却方式对渗硼层脆性的影响也做了研究。     

45钢膏剂渗硼及耐蚀性研究

通过试验探讨了45钢渗硼后的组织和工艺参数对渗硼层厚度影响规律以及渗硼层的耐蚀性。结果表明：渗硼时间一定，渗硼层深度和渗硼温度呈负指数方关系;渗硼温度一定，渗硼层深度与渗硼时间呈抛物线关系;渗硼试样耐蚀性明显优于未渗硼试样，而单相渗硼层的耐蚀性又明显优于双相渗硼层。