渗碳

A method for eliminating the internal oxide structure in the gas-phase carbon-nitrogen osmosis of gear features that the CCL4 is added to the kensene as carburizer and then is decomposed to generate Cl2 for reducing the oxide, the ammonia gas as nitrizing agen passes through the cylinder of silica gel or granular calcium chloride for adsorbing residual water vapour and then through the cylinder of 5A molecular sieve for adsorbing residual O2, and the resistance wire is wound on igniting pipe at furnace top to prevent the NH4Cl in exhausted gas from being condensed.

本方法采用在气体渗碳剂煤油中，加入6～8％的CCl 4 ，使共渗炉内的CCl 4 分解出新生的Cl 2 ，使已形成的合金元素内氧化物还原；在渗碳剂氨气入共渗炉前，先经过硅胶瓶或桶及粒状氯化钙瓶或桶过滤，吸附掉氨气中的残留水蒸汽，再经过5A分子筛瓶或桶吸附掉氨气中的残留氧；在靠近炉顶位置的点火管周围缠绕带瓷环的电阻丝，靠电阻丝的副带加热，使排气中的NH 4 Cl不冷凝结块等措施实现内氧化组织的消除。

Heat treating technology development closely connected with three large scale technology andequipment importing is reviewed, and the fbatures of hcat treating specialization and large scale production areanalyzed. Main tcchnical progresses ofgas carbonitriding instead ofliquid cyaniding, improvement ofcontrol accuracyin gear carburizing, improvement of carburizing layer unitbrmity by preoxidation, increment of raw gas purity incontrolled atmosphere use of fbrging wastc heat cooling control for normalizing,...

回顾我国汽车工业热处理技术发展与3次大规模技术引进密切相关，分析了汽车工业热处理技术发展专业化，规模生产的特点，列举了10年来在气体碳氮共渗取代液体氰化；齿轮渗碳控制精度提高；采用预氧化工艺提高渗碳层均匀性；解决可控气氛中原料气纯度以及锻造余热控冷正火和等温正火技术的应用等方面嵢〉玫闹饕删停岢龈咝＝⑷却砩璞缸ㄒ档冉ㄒ椤

Carbonitriding Carbonitriding, sometimes known as dry cyaniding or nicarbing, is a case-hardening process in which the steel is held at a temperature above the critical range in a gaseous atmosphere from which it absorbs carbon and nitrogen.

碳氮共渗碳氮共渗，有时也称为干法氰化或渗碳氮化，是一种表面硬化工艺。通过把钢放在高于临界温度的气体中，让它吸收碳和氮。

Earbonitriding Earbonitriding, sometimes known as dry cyaniding or nicarbing, is a case-hardening process in which the steel is held at a temperature above the critical range in a gaseous atmosphere from which it absorbs carbon and nitrogen.

碳氮共渗碳氮共渗，有时也称为干法氰化或渗碳氮化，是一种表面硬化工艺。通过把钢放在高于临界温度的气体中，让它吸收碳和氮。

This corresponds to larger carbon transfer coefficients which can be increased with increasing carburizing temperature and can hardly be affected by carbon potential of the atmosphere.

提高渗碳温度，或渗剂中添加稀土，可使碳的传递系数增大。炉气碳势对碳的传递系数几乎没有影响。

The paper takes the carburized gear which is applied in machinery industry as an example.

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 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。

It can make carburized layer on titanium alloys by electrospark deposition, and the carburized depth is about 40～50 μm.

用电火花渗碳技术可在钛合金表面形成一层40～50μm厚的渗碳层，分析显示渗碳层中主要是由石墨电极与基体反应生成的TiC相组成。

The case depth is the most important quality index of carburized materials, and it is usually checked by selective examination. This traditional method is inefficient and low reliability.

渗碳层深度是衡量渗碳质量的主要技术指标之一，传统的渗碳层深度检测方法是对大批产品采取抽样检查，不仅检测效率低，可靠性差，而且检测时需破坏样品。

Meanwhile, it also presents that the Heat treatment cementation using purified natural gas, Methyl alcohol; methanol can not only improve the quality of products, but also enhance the carburizing speed, reduce the gas consumption and extend the lifespan of equipment spare parts and so on.

同时，提出了热处理渗碳采用净化后的天然气、氨水、甲醇不但可提高产品质量，而且还具有提高渗碳和碳氮共渗速度、降低气源消耗和延长设备备件使用寿命等功效。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。