回火

In high ─ speed steel, molybdenum can replace parts of tungsten.

钼铁是钼与铁的合金，它的主要用途是在炼钢中作为钼元素的加入剂，钢中加入钼可使钢具有均匀的细晶组织，并提高钢的淬透性，有利于消除回火脆性，在高速钢中，钼可代替一部分钨，钼同其他合金元素配合在一起广泛地应用于生产不锈钢、耐热钢、耐酸钢和工具钢，以及具有特殊物理性能的合金，钼加于铸铁里可增大其强度和耐磨性。

The carbon potential in zones of II, III, IV and V is 1.00%, 1.15%, 0.90% and 0.90%, respectively. The temping temperature is 190 ℃, and the cycle of feed is 25min.

确定了最佳的热处理渗碳工艺参数为：Ⅰ区880℃；Ⅱ区900℃、碳势为1.00 %；Ⅲ区920℃、碳势为1.15%；Ⅳ区900℃、碳势为0.90 %；Ⅴ区835℃、碳势为0.90%；回火温度190℃，推料周期为25 分钟。

To examine and analyze the fracture of spring made of 55CrSi oil-tempered spring steel wire as pre-pressing.

对55CrS i油淬火回火弹簧钢丝绕制的弹簧在压并时出现的断裂进行检测分析，研究结果显示，如果工艺或操作不当、磨削力量过大会产生马氏体及裂纹，导致弹簧早期失效。

The oil-tempered spring steel wire, complete sets of production technology equipment for CO2 gas shield welding wire, shaped section steel wire, quality carbon structure steel wire and etc.

油淬火回火弹簧钢丝、CO2气保焊丝成套生产技术设备、异型断面钢丝和优质碳素结构钢丝等项目均为国内领先技术与产品。

Our main products include various oil-tempered steel wires, high quality carbon spring steel wires, piano wires, alloy spring wires, carbon structural wires, alloy structural wires, tool wires, cold heading steel wires, free cutting steel wires and alloy welded wires, along with precise special-shaped steel wires with various sections such as rectangle, square, trapezium, semicircle, triangle and drum.

北京兴发威尔金属制品有限公司主要产品有：各类油淬火一回火钢丝，优质碳素弹簧钢丝，琴钢丝，合金弹簧钢丝，碳素结构钢丝，合金结构钢丝，工具钢丝，冷顶锻用钢丝，易切钢丝，合金焊丝以及各种断面形状的，如矩形、方形、梯形、半圆形、三角形、鼓形等精密异型钢丝。

Mainly uses in the laboratory, the Industrial and mining establishment, the universities, colleges and institutes, the Scientific research Unit making the ultimate analysis determination, the ash content determination, the few low melting point metal to fuse, other small heat treatments and experiment and so on metal parts quenching, annealing, tempering, the electric stove may also use in the high temperature heating experiment.

主要用于实验室、工矿企业、大专院校、科研单位作元素分析测定、灰份测定、少量低熔点金属熔解、其它小型金属零件淬火、退火、回火等热处理和实验之用，电炉还可用于高温加热实验。

Engine tappet is easy distorting and cracking by using whole heating quenching in salt bath and the high temperature annealing for the pole.

发动机挺杆经盐浴炉整体加热淬火和杆部高温退火处理后易产生畸变开裂，改用专用淬火设备，在发动机挺杆底面进行局部火焰淬火和低温回火工艺后，实现了对挺杆底面局部淬火而杆部硬度不发生变化，达到了质量要求，产品生产自动化程度高，生产率高，效果良

Oil quenched and tempered spring wire is the raw material of car's suspension spring and valve spring .

油淬火一回火弹簧钢丝是生产制造轿车悬挂弹簧和发动机气门弹簧的原料，这两类弹簧在汽车工业零部件中属于&D&级产品，即按相关规定，一旦发现有缺陷整车必须强制召回。

The transition of S-N curve from the former to the later is almost continuous.

前者的S-N曲线向后者的转移几乎是连续的，回火温度对疲劳强度和寿命没有明显的影响。

Internal friction in hardened carbon steels was measured with a torsion pendulum and an internal friction peak was observed around 130℃when measurements were taken from room temperature upwards.

由内耗峰的出现可以认为马氏体在第一个回火阶段中的转变产物与母体具有共格性，由于共格界面的应力感生运动而引起内耗。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷