查询词典 quenching

The hardened case ununiformity and quenching cracks of H32058 driven ring gear after the medium frequency induction quenching were analyzed.

分析了H32058从动齿圈经中频淬火后出现的淬硬层分布不均和淬火裂纹等缺陷的原因，通过重新设计感应器和反复工艺调试，利用两次中频加热淬火方式实现预热中频淬火，获得了沿齿廓分布的淬硬层。

An ultra-high strength, weldable, low alloy steel with excellent cryogenic temperature toughness in the base plate and in the heat affected zone when welded, having a tensile strength greater than 830 MPa (120 ksi) and a micro-laminate microstructure comprising austenite film layers and fine-grained martensite/lower bainite laths, is prepared by heating a steel slab comprising iron and specified weight percentages of some or all of the additives carbon, manganese, nickel, nitrogen, copper, chromium, molybdenum, silicon, niobium, vanadium, titanium, aluminum, and boron; reducing the slab to form plate in one or more passes in a temperature range in which austenite recrystallizes; finish rolling the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar3 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature; stopping the quenching; and either, for a period of time, holding the plate substantially isothermally at the QST or slow-cooling the plate before air cooling, or simply air cooling the plate to ambient temperature.

在基体板以及焊接时的热影响区处的低温韧性优异的超高强度、可焊接、低合金钢具有高于830MPa（120ksi）的抗拉强度，并且具有包含奥氏体薄膜层和细晶粒的马氏体／下贝氏体板条的显微层状组织，所述钢的制备过程为：加热含有铁以及特定重量百分比的添加元素的钢坯，所述添加元素为碳，锰，镍，氮，铜，铬，钼，硅，铌，钒，钛，铝，以及硼中的一些或全部；在奥氏体可发生再结晶的温度范围内，采用一个或多个道次，将所述钢坯轧制成板材；在低于奥氏体再结晶温度但高于Ar 3 转变点的温度下，采用一个或多个道次对所述板材进行终轧；将所述终轧板材淬火至一适当淬火终止温度；停止所述淬火；或者在空冷前在QST点基本等温保持所述板材一段时间，或者对所述板材进行缓慢冷却，或者只是简单地将所述板材空冷至室温。

This kind of defects can be eliminated by controlling S content, avoiding eutectic sulfide, improving sulfide distribution and meliorating quenching process to minish quenching stress.

可以通过控制硫的含量、避免产生共晶硫化物，改善其分布状态，改善淬火工艺以减小淬火应力来消除。

Main devices of heat treatment line: step quenching and tempering furnaces, hi-pressure water descaling unit, spray quenching unit , three-roller and three-unit sizing machine of OD 550mm, hot-straightening device of OD 273mm, cold-straightening device of OD 273mm, normalizing cold-bed, pipe-body transverse and longitudinal EMI thicknesser, pipe-end MPI machine, on-line measuring/stenciling machine, sampling saw, 80Mpa hydrostatic testing machine, UT device, cutter-head and chamfering machine, painting devices.

热处理线主要设备：步进式淬火炉和回火炉、高压水除鳞装置、喷淋式淬火装置、φ550三辊三机架定径机、φ273温矫直机、φ273冷矫直机、正火冷床、管体纵横向漏磁探伤测厚机、管端磁粉探伤机、在线测长/喷印机、取样锯、80MPa水压试验机、超声波探伤机、铣头倒棱机、涂漆装置。

Compared with conventional quenched and tempered process, Direct quenching eliminated off-line reheating and quenching, reduced processing costs and shortened process, in addition, DQ process increase hardenability ,weldability, and mechanical balance by reducing alloy elements.

本文以工业生产的转炉连铸22SiMn2TiB钢为研究对象，以实验室热轧实验为主要研究手段，对直接淬火工艺在不同轧制条件下对钢板微观组织与力学性能的影响进行了研究，同时与再加热淬火工艺进行了比较，探讨了此类钢在低温回火下提高强韧性的可能性和直接淬火工艺的机理。

The results show that new residual stress is about 6MPa under air-cooled normalizing; due to chilling effect of surface quenching, the temperature differences between coarse bar and thin bar in stress frame, and between surface and core of the coarse bar are tremendous; in quenching process, the stress of the certain areas in the coarse bar is maximum at 2s, more than 420MPa, the stress frame casting has the bigger possibilities of fracture.

结果表明，正火空冷时新产生的残余热应力约6MPa；淬火时由于表面激冷作用，应力框在粗细杆间及粗杆的表面和芯部都有巨大温差；铸件在淬火的过程中，粗杆的某些部位在2s时等效应力达到最大，超过了420MPa，极有可能导致铸件断裂。

Quenching of chlorophyll fluorescence decreased and Non-photochemical Quenching of chlorophyll fluorescence increased for both alfalfas under drought stress. Generally speaking, qP decreased less and qN increased more in the high drought-resistance alfalfa than in the low drought-resistance alfalfa, suggesting that when under drought stress, the electron transport activity and photosynthetic apparatus was damaged less in the alfalfa with high drought-resistance than in the alfalfa with low drought- resistance.

PSⅡ光化学淬灭系数、非光化学淬灭系数的变化表现为干旱胁迫下两种紫花苜蓿qP值降低、qN值升高，总体上抗旱性强的紫花苜蓿qP降低的幅度低且qN升高幅度大，表明抗旱性强的紫花苜蓿PSⅡ反应中心电子传递活性受到的影响小，光合机构的损伤程度低。

Hardness of malleable cast iron decreases with the increase of Si content after cooling and water quenching; while the hardness increases with the increase of Si content after furnace cooling and oil quenching.

在空冷和水淬后，可锻铸铁的硬度随硅含量的增加而降低；在炉冷和油淬后，可锻铸铁的硬度随硅含量的增加而升高。

The vacuum gas quenching process of ring die of pellet mill is analyzed and discussed based on selection of heat treatment equipment,setting of process parameters,comparison of gas quenching cooling medium and control of deformation amount and others.

对饲料制粒机环模的真空气淬工艺，从热处理设备的选用、工艺参数的设置、气淬冷却介质的比较及变形量的控制等多个方面进行了分析和讨论。

Most gasifiers with quenching process have the problem of carrying water in the quenching chamber, which is more obvious under high load conditions constraining the increase of the gasifier load.

采用激冷流程工艺的气化炉，大都存在着激冷室带水的共性问题，且在高负荷生产状况下尤为明显，直接制约了气化炉负荷的提高。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。