This paper has shown that the key to the problem of shielding the welded zone of thin Ti-alloy plate lies in the width of heating region at high temperatures above 700 ℃ and the cooling rate above 400 ℃ .

试验表明，用微束等离子焊接钛合金薄板时， 焊缝在700℃以上的 加热范围与700℃至400℃间的冷却速率是控制其保护效果的关键。

It was discovered that structural heredity phenomenon took place in the non-equilibrium structure of overheated zone of HQ70 steel after another quick heating .

发现，HQ70钢过 热区粗大非平衡组织，经第二次快速 加热到正火 区，并没有出现通常所认为的“细化品粒”现象，而是出现了“组织遗传”。

As to the heat source selection for a new residence zone in Beijing Compares some plans from the aspects of technology economics environment protecting and operation and put forward a favouring plan of dispersing heating .

对北京一新建住宅 小区采暖的热源选择，从技术、经济、环保及运行管理各方面比较后，推荐分散 供热方案。

The experiments results of different heating rate show that TG curves move to high temperature zone with the increasing of heating rate .

不同升温速率的实验结果曲线表明，提高 升温速率，TG曲线向 高温方向移动；

Fitting to lower melting point of tin-lead solder the length of zone of heating is 150mm ;

由于含铅钎料熔点低， 受热 区长度只要150mm就可以了。

The non-oxidizing zone is consisted of entry sealed room waste gas preheating zone direct heating zone and furnace nozzle and flue gas exhausting system .

无氧化 段由入口密封室，废气预热区，直接 加热区，炉喉，废气排放系统组成除气加热器除氧加热器

By adjusting the site of the heating ring the length of zone of heating can be modified .

通过调整加热圈的位置来改变 受热 区长度。

Mechanical Properties of Carbon Migration Zone of Dissimilar Steel Welded Joints after Heating

异种钢焊接接头 加热后碳迁移 区力学性能的变化规律

Coming into being intermetallic compounds and enlarging of crystal grain are related to the temperature in heat-affected zone . They are also influenced by the velocity of the heating and cooling of the weld .

金属间化合物的生成和晶粒粗大与热影响 区温度分布有关，同时还与激光焊接 加热和冷却的速度之间相关。

Surface roughness of hardened zone of the ball head pin has been improved on by the use of inert gas and reformed fixture during the induction heating .

在感应 加热过程中采用惰性气体和改进的工装夹具改善了淬火 区的表面粗糙度。