查询词典 decarburized

The spring steel 60 Si2Mn will be decarburized in heating process,and decarburization will reduce the performance of the machine parts.

弹簧钢制作的零件，在热处理过程中会严重脱碳，从而使零件的使用性能，特别是疲劳性能大幅度下降[1]。

The results show that the main reason is many little cracks exist,and heavy reticulation structure,inclusion, coarse grain and side decarburized stucture.

结果表明，其发生断裂的主要原因是存在较多的小发纹，加之较严重网状组织、夹杂物、晶粒粗大和边部脱碳组织，在机械加工力的共同作用下，导致轻轨发生断裂。

In order to require of the decarburized layer depth of T11A～T13A carbon tool steel wire rod up to the GB/T1298-1986 standard,the correspond heating processes for roughing soaking pit,pusher-type furnace for structural steel and rail and step-by-step furnace for wire were established based on the feature of T11A～T13A carbon tool and process technology in Pan Steel Co.

为使攀钢T11A～T13A碳素工具钢盘条的脱碳层深度满足GB/T12 98 1986标准的要求，根据T11A～T13A碳素工具钢的特点及攀钢的生产工艺，对初轧均热坑、轨梁推钢式加热炉及线材的步进式加热炉制定了相应的加热工艺，生产出的T11A～T13A碳素工具钢盘条的脱碳层全部满足GB/T12 98 1986标准的要求。

Nanosized WC powders with high carbon content were treated in flowing H_2 atmosphere to remove the uncombined carbon.The effect of processing temperature,holding time,and flux of H_2 on carbon content and particle size of decarburized powders were investigated.

将高碳含量的纳米WC粉末在氢气流中进行热处理脱除游离碳，研究处理温度、保温时间和H2流量等工艺参数对WC粉碳含量及粒度的影响。

A new method for characterization of softening in a decarburized layer is proposed.

提出一种表征脱碳层软化的新方法，该方法借助X射线应力分析技术测量屈服强度在脱碳层深度方向上的分布。

Decarburized layer appears in the two sides of the crack.

裂纹两侧出现了一定宽度的脱碳层，脱碳层内部出现了二次氧化产物。

When heating,the part was exposed in the air,so it's easier to be oxdized,decarburized,which effect the surface characters of part.

金属加热时，工件暴露在空气中，常常发生氧化、脱碳(即钢铁零件表面碳含量降低)，这对于热处理后零件的表面性能有很不利的影响。

When solid solution occurs at 1 030-1 230 ℃,the room temperature impact value of steel is increased with solution temperature,and the depth of decarburized layer and grain size are increased.

在1030-1230 ℃固溶时，试验钢的室温冲击功随固溶温度的升高而增加，表面脱碳层深度和晶粒尺寸则随之增大。

Comparison and analysis of depth distributions of yield strength, half-width of X-ray diffraction profile, and microhardness in the decarburized layer of spring steel 60Si2Mn was made, and the advantage of the new method was discussed.

对弹簧钢60Si2Mn的脱碳层的屈服强度、X射线衍射线半高宽和显微硬度的层深分布作了对比和分析，在此基础上指出利用新方法进行软化表征有助于更深入阐明脱碳影响疲劳强度的机制，并有望建立某些定量关系。

A preparation method of the visible-light photocatalyst Bi2WO6 nano-powder is characterized by comprising the steps as follows:(1) the selection of raw materials;(2) bismuth nitrate Bi(NO33 question mark 5H2O is added into a citric acid solution to obtain the citric acid solution containing white sediment;(3) EDTA is added into ammonia water which is then added dropwise with the citric acid solution containing the Bi(NO3)3 question mark 5H2O so to obtain a solution of bismuth;(4) the solution of bismuth is added with (NH4)6W7O24 question mark 6H2O solution to form a precursor solution which is then stirred, dried, coked, cooled and ground to obtain decarburized powder;(5) the decarburized powder is roasted for 2h to 4h under 450 DEG C to 550 DEG C to obtain the visible-light photocatalyst Bi2WO6 nano-powder.

可见光催化剂Bi 2 WO 6 纳米粉体的制备方法，其特征在于它包括如下步骤：1原料的选取；2将Bi(NO 3 ) 3 5H 2 O加到柠檬酸溶液中，得到含有白色沉淀的柠檬酸溶液；3将乙二胺四乙酸加到氨水中，并缓慢滴加入含有Bi(NO 3 ) 3 5H 2 O的柠檬酸溶液中，得铋的溶液；4将(NH 4 ) 6 W 7 O 24 6H 2 O溶液加入上述铋的溶液中，组成前驱液；搅拌，干燥，焦化，冷却后，研磨，得去碳的粉体；5将去碳的粉体在450～550℃下焙烧2～4h后，得到可见光催化剂Bi 2 WO 6 纳米粉体。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。