The hardening case depth and hardness curve can be changed by adjusting heating time, heating power and cooling speed during induction hardening.
在感应淬火中，通过改变加热时间、加热功率和冷却速度可以改变淬硬层深度和硬度梯度。
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.
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。
This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.
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。
According to real production case of our country, it is necessary to establish the standard about the conversion tables on hardness and strength of hardened high speed steel.
根据我国具体的生产实际情况，有必要建立我国自己的淬硬高速钢洛氏硬度和维氏硬度换算的标准。
Higher nitrogen potential may promote formation of white layer, increase hardness and wear resistance but at the same time increase brittleness of nitriding case.
提高氮势可促使白层形成，提高渗层硬度和耐磨性，但使其脆性增高。
The results show that, compared with the boronizing, the case of RE B Ti coating has higher microhardness and smoother hardness gradient;
和纯渗硼层相比，发现共渗层具有高的显微硬度和低的硬度梯度、高耐磨性和热疲劳性；
NP hardness is established for the case with agreeable processing times and due dates.
当加工时间和工期一致单调时，该问题是NP困难的。
By make experiment of plunger case surface abrasion hardness, in the last, adopt high strength engineering plastic to act as anti-abrasive material, make the success, get great result.
通过对柱塞的表面耐磨层进行各种试验，最后采用了高强度工程塑料进行压注试验，取得了成功，效果显著。
Effect of nitrogen and ammonia content on the nitriding rate, the microstructure, nitrogen concentration and hardness distribution of the nitriding case were studied.
研究氨气和氮气混合气氛的成分对渗氮速率的影响，测定了渗氮层的显微组织、渗氮层氮浓度分布及有关力学性能。
The tubercles were round or sphere round, with moderate hardness. Only 1 case had tenderness and all of them were azoospermia.
结节均为圆形或椭圆形，质地中等，仅有1例患者有压痛。
The tubercles were round or sphere round, with moderate hardness. Only 1 case had tenderness and all of them were azoospermia.
结节均为圆形或椭圆形，质地中等，仅有1例患者有压痛。
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