控制循环空气的相对湿度和空气的温度可防止表面硬化的出现。
It is prevented by controlling the relative humidity of the circulating air and the temperature of the air.
表面硬化：表面硬化的紧固件是黑色金属，其表面经过处理后比内心硬度要高。
Case hardened: a case hardened fastener is a fastener of ferrous material having a surface which has been made harder than the core.
CDS生产公司的台式分类器是一款标准的台式滚动分类系统，设备包括12“表面硬化的不锈钢滚筒，可调节滚筒高度和角度。”
CDS Manufacturing builds table top roll sorters. Standard table top roll sorter system includes a pair of 12 "case hardened stainless steel rollers, adjustable roller height and Angle."
这一不透气的壳层(或边界层)会阻滞水分自由扩散，这种情形称为表面硬化。
This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.
不幸的是尽管中国制造的平头挺杆物美价廉，但是其冶金技术遭到质疑，加工、热处理、表面硬化质量也遭质疑。
Unfortunately, though flat tappets from China are cheap, their metallurgy is suspect-and the same goes for the quality of their machining, heat treatment and surface-hardening.
渗氮在钢表面获得远远超出正常标准的硬度。其硬度范围为900到1,100布氏硬度，这远高于普通表面硬化所获得的硬度。
Nitriding develops extreme hardness in the surface of steel. This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.
当然会有岩浆，硬化成新的表面，因为板块被拉开而在板块下方的就是岩浆。
Of course there will be lava, hardening into a new surface, as the plates are being pulled apart and beneath the plates is magma.
因此，辊子需要较高的表面硬度和较深的硬化层深度。
Thus, these rolls require a higher surface hardness and must be hardened to a greater depth.
在该工具内面的特殊的经硬化处理的金属割刀与落鱼的外表面接合。
Special hardened metal-cutters on the inside of the tool engage on the external surfaces of the fish.
其硬度范围为900到1，100 布氏硬度，这远高于普通表面硬化所获得的硬度。
This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.
实验结果表明，合金铸铁光束表面相变硬化层由与基材相邻的不完全相变区及表面完全相变区组成。
The experimental results show that the surface hardened layer consists of non-full transformation area which is adjacent to the base metal and surface full transformation area.
硬化的阀座表面—阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。
Hardened seating surfaces - both disc and body seating surfaces are hard faced for maximum service life.
钢的热处理工序包括硬化、回火、退火和表面硬化。
The procedures of heat treatment of steel include hardening tempering annealing and case hardening.
认为激光硬化处理能够有效地改善材料的表面硬度和耐磨性。
The laser hardening material can effectively improve the surface hardness and wear resistance.
文章还介绍了为预防汽轮机喷嘴和动叶片免受固体颗粒侵蚀所采用的表面硬化处理技术，包括等离子喷涂层和扩散渗层在内；
The paper also briefs the nozzle or moving blade surface hardening treatment technology, including plasma spraying and diffusion layer for preventing the nozzle and moving blade from SPE.
真空（溅）镀膜有完整的加工设备，可提供UV、不导电NCVM、EMI、硬化…等表面加工处理。
There are integrated equipments on vacuum sputtering plating which can provide surface fabrication such as UV, NCVM, EMI, induration.
研究了软化和硬化材料表面喷丸应变层内的组织结构。
The microstructure in shot-peening surface plastic straining layer of several softening and hardening materials are investigated.
试验证明这种发生器对材料的表面局部硬化非常有效。
Experiment has shown that it has good effect on partial surface hardening.
弹性蛋白的表面层几乎是汇合的但在易发生动脉粥样硬化的分叉点却是缺失的，高密度的胶原-蛋白聚合物暴露。
A nearly confluent elastin surface layer was present throughout but was missing at atherosclerosis-susceptible branch points, exposing dense collagen-proteoglycan complexes.
介绍采用热化学共渗法对硬质合金拉丝模芯进行超硬化处理，以提高其表面硬度的方法。
The article introduces the method of superhardening treating hard alloy drawing die core with thermochemistry copermeation method so as to improve its surface hardness.
结果表明，表面熔化处理后的硬化层的硬度梯度平缓，耐磨性高。
The results showed that the hardening layer has better hardness gradient and high wear resistance.
主要介绍了激光相变硬化的特点及强化机理、激光表面相变硬化工艺。
The characteristic and mechanism of laser transformation hardening, the technics of laser surface heat treatment were introduced.
结果表明，激光硬化处理的表面能够有效地改善材料表面硬度和耐磨性。
The results show, surface treated by laser hardening can improve the surface hardness and wear resistance.
研完了表面状态、斑尺寸、率及扫描速度对硬化层特征及耐磨性的影响。
The influence of coating, spot size, power and scanning speed on hardening layer features and wear resistance were studied.
羊毛和毡绝缘表面的硬化增强了产品对高速气体侵蚀性的抵抗能力，同时也降低了渗气性。
Hardening of the surfaces of blanket and felt insulation improves the resistance to erosion by high-velocity gases and reduces the permeability of gases.
由于它含有较少的碳，这些钢不能被硬化，只能进行表面硬化。
Since medium carbon steels have a higher carbon content they can be heat treated to make parts such as studs, pins, axles, and nuts.
论述了用于金属材料表面热处理的等离子弧发生器的工作原理、结构特点和参数设计。试验证明这种发生器对材料的表面局部硬化非常有效。
The working principle, structure and parameters design of plasma arc generator for heat treatment are described. Experiment has shown that it has good effect on partial surface hardening.
硬化的阀座表面？阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。
Hardened seating surfaces? Both disc and body seating surfaces are hard faced for maximum service life.
硬化的阀座表面？阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。
Hardened seating surfaces? Both disc and body seating surfaces are hard faced for maximum service life.
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