查询词典 hardness

Two series of polyurethane acrylate grafted acrylic resins (Acr-g-TPU-PETA and Acr-gPPU-PETA) self-emulsifying systems are obtained by grafting -NCO group modified polyurethane acrylates with acrylic copolymer prepared from n-butyl acrylate, styrene,βhydroxyethyl methacrylate and acrylic acid The self-emulsifying systems showed Newtonian fluidity with viscosity closed to that of water, the solid contents were around 30% The T〓 of 15～4℃ for dried film before photocuring favored film formation at room temperature DSC and DMA results showed that PU-PETA is compatible with acrylic resin in the grafted resin The TG and dTG curves for Acr-g-PU-PETA samples were substantially different from the corresponding blends, and the brodened dTG peaks for photocured grafted resin suggest that there might be multiple interactions among chain segments The photocued film of the grafted resins self-emulsifying system exhibited good overall properties with polyurethane acrylate grafts ranging from 30% to 50%, and Acr-g-TPU-PETA series showed better properties than Acr-gPPU-PETA series The adhesion of the photocured film was 1～2 grade, impact strength was 50kg-cm and flexibility was 1mm The Shore hardness and the adhesion of the film decreased markedly if PETA was replaced by HEMA as photoactive group due to the lower C=C double bond content in the grafted resin The polyhydroxy amine-linked thioxanthones photoinitiators can be evenly dispersed in self-emulsifying system without color spot appearing in the dried film The films photocured with IV〓～IV〓 generally exhibited higher Shore hardness, gloss and solventresistance than that cured with Irgacure 2959 and did not induce the rusting of the iron substrate Pigmenting with titanium oxide had no effect on the photocuring The polyhydroxy amine-linked thioxanthone IV〓 and IV〓 can be new candidates for the formulation of titanium oxide pigmented photocurable water-borne coatings for their pale-yellow appearance and slight interference with the color of the coatings WB 4759 with high water-solubility coalesced and separated from the dried resin film, and even induced the rusting of iron substrate.

以丙烯酸丁酯，甲基丙烯酸-β-羟乙酯，丙烯酸及苯乙烯合成厂丙烯酸共聚树脂，并与含-NCO端基的聚氨酯丙烯酸酯接枝反应，经水性化后，得到两个系列（Acr-g-TPU-PETA和Acr-g-PPU-PETA）各5个不同配比的丙烯酸树脂接枝聚氨酯丙烯酸酯自乳化体系，粘度与水相近，为牛顿流体，固含量30％左右。光固化前干燥涂膜的玻璃化转变温度在-15℃～4℃之间，有利于室温下成膜。DSC及DMA谱表明两种树脂基本相容。Acr-g-PU-PETA的热失重行为明显不同于共混材料，接枝样dTG峰明显宽化，表明接枝样中链段之间的相互作刚有多重性，丙烯酸树脂与聚氨酯之间有一定的相容性。接枝树脂自乳化体系光固化涂层的综合性能以聚氨酯丙烯酸酯成分为50％～30％者相对较好，且以Acr-g-TPU-PETA系列更理想。光固化膜的附着力为1～2级，冲击强度为50kg·cm，柔软性多为1mm。以HEMA代替PETA作为接枝树脂的活性基团，碳—碳双键密度太低，光固化膜交联点太少，硬度和附着力均较差。多羟基胺连硫杂蒽酮光引发剂能均匀分散于树脂自乳化体系和接枝树脂干膜中，不出现色斑，光固化膜肖氏硬度一般高于以Irgacure 2959为光引发剂的光固化膜，光泽度及耐丁酮溶剂性能均有所提高，不会诱导铁基生锈，钛白着色对光固化结果几乎没有影响。本论文所合成的多羟基胺连硫杂蒽酮光引发剂IV〓与IV〓为浅黄色，对光固化涂层的颜色干扰较小，为配制钛白着色光固化水性涂料提供了新的光引发剂。水溶性太强的WB 4759在干膜中易聚结析出，且对所附着的铁基有诱导锈蚀作用。

After crystallization silicide is finished, the density of the silicified wood is very high, the hardness can also reach 6.5-7.0 grades, like glass, much harder, similar to the gem (more than 7 grades) than the marble (4 grades), the timber of so high hardness, it can not moved that the wood is sawn, can't saw to cut open with the general stone material either.

在硅化结晶完成之后，硅化木的密度是很高的，硬度也可达到6.5-7.0级，与玻璃一样，比大理石(4级)要硬得多，与宝石7级以上）相似，如此高硬度的木材，木锯是啃不动的，也不能以一般石材来锯剖。

For diameter 26mm axle bar of CK45 steel,when surface hardness is 54～ 62HRC,core maximum hardness is 32HRC and case depth is 3.8～5.3mm,it has an optim um combination of strength and ductility .

对φ26mm CK45钢轴杆，当表面硬度为54～62HRC，硬化层深度为3.8～5.3mm，心部硬度＜32HRC时，轴杆具有最佳的强韧性，获得了较高的静扭强度和扭转疲劳寿命。

In order to explore the influence of the bath composition on Ni-W-P alloy coating structure and properties, to find the right ratio, so as to lay the foundation for follow-up experiments, SEM/EDS, X-ray diffraction, and metallographic analysis and other methods were adopted to study the composition and structure of different chemical deposition of Ni-W-P alloy. And the hardness of different components of the sediment layers plated state and the hardness after heat treatment were measured.

为了探索镀液组分对Ni-W-P合金镀层结构与性能的影响规律，寻求合适的镀液配比，为后续实验莫定基础，采用扫描电镜／包谱、X射线衍射以及金相分析等方法，研究了不同成分和结构的化学沉积Ni-W-P合金层，测量了不同成分沉积层的镀态与热处理后的硬度。

The results show that using double insurance processthe hardness of thread area of bevel driving pinion can fully meet the need of technology requirement of the product with stable qualitybut its production costs is higherand that using induction annealingthe hardness of thread area can also meet the require...

结果表明：采用双重保险工艺处理的主动圆锥齿轮尾部螺纹硬度完全可以达到产品技术要求，质量稳定可靠，但成本较高；采用感应退火工艺，尾部螺纹硬度可以达到技术要求，其特点是节能、生产效率高，但需要定期对尾部螺纹进行力学性能检测。

In this paper, silica was selected to improve the hardness of silicone rubber, cerium dioxide was selected to improve the thermal stability, we also investigated the effect of different size and different dosage of cerium dioxide to the thermal stability of high hardness silicone rubber, and analysed elasticity especially.

通过添加气相法白炭黑增加硅橡胶硬度，添加金属氧化物改善硅橡胶热稳定性。

Anodised films on aluminum components for micro hardness measurements require sufficient film thickness to ensure that the hardness indentations can be consistently made near the center of the thickness without cracking of the film.

铝件的阳极氧化层微观硬度测量要求有足够的薄膜厚度以保证在薄膜不破裂的情况下可以得到一致的硬度缺口。

Anodised films on aluminum components for micro hardness measurements require sufficient film thickness to ensure that the hardness indentations can be consistently made near the center of the thickness without cracking of the film.

量度铝件阳极氧化层的显微硬度时，需要有足够厚度的氧化层，以保证每一次压头总一致的压入在氧化层厚度中心附近而不出现破裂的情况。

In this paper,various factors which can influence the hardness of gear have been analyzed,the causes of hardness changing have been found out and rational carburized layer depth and carburizing process have been ascertained.

以机械工业广泛使用渗碳齿轮为例，分析热处理工艺影响硬度的各种因素，找出硬度变化的原因，确定合理的渗碳层深度和渗碳工艺并提出预防措施。

In hardness and high hardness wear resistant ring expansion ring expansion.

中硬度耐磨胀圈和高硬度耐磨胀圈。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。