The precipitation behavior of the V-4Cr-4Ti alloy and the hardening by aging were studied by isochronally annealing and aging heat treatments in vacuum.

采用真空退火和真空時效處理美女a黄色视频，研究了V-4Cr-4Ti合金的沉淀析出特性和時效強化效果激情乱伦小说网站。

This welding wire not only has the inherent properties of metal powder-cored wire, such as with better welding quality, without slag, highly efficiency and conveniently adjusting the alloying elements etc., but also has the advantage of low hardness in as-welded (less than HRC45), good machinability, high hardness in as-aged (more than HRC55) and better wear resistance with customary working procedure on making or repairing equipments such as rollers when reasonable designing the alloys content. The author adequately makes use of the high-tempering in the required stress relieving working procedure. During this working procedure, which causes the hardness of overlaying metal increased by the reason of austenite changes into tempered martensite and more chiefly what is the precipitation of a lot of carbide by secondary hardening simultaneously. This wire can solve the hard rolled problems of some solid wires with higher alloys while it can get over the conflict of existing overlaying materials what are always possesed high hardness with poor machinability or low hardness, good machinability with poor wear resistance. Further, it also can overcome the intenerating phenomena between welding beads and make the external hardness of overlaying metal uniform. Be sure it could be found important meaning in the overlaying of wear-resistant equipments, such as the precise roller.

該焊絲除了具有金屬粉型藥芯焊絲焊接質(zhì)量好久久国产乱子伦精品、無渣、高效率和合金成分可方便調(diào)節(jié)等固有的優(yōu)點外啊啊啊啊国产一区在线观看，合理的設(shè)計粉芯中的合金成分性爱a视频，按通常工序制造與修復(fù)軋輥等設(shè)備国产在一区二区线免费视频，充分利用必需的消除應(yīng)力工序的高溫回火欧美性爱高超网站，堆焊層金屬在奧氏體轉(zhuǎn)變?yōu)榛鼗瘃R氏體的同時更主要是通過二次硬化析出了大量碳化物導(dǎo)致硬度增加，使得該焊絲還具有焊態(tài)硬度低(小于HRC45)国产又黄又粗又长网站、機加工性能好和時效態(tài)硬度高(大于HRC55)www无码观看十八岁、耐磨性能好等優(yōu)點，解決了某些高合金實芯焊絲軋制困難的問題人禽性直播，同時克服了現(xiàn)行堆焊材料硬度高蜜臀aⅴ免费网站欧美、加工性能差或者硬度低、加工性能好自拍偷拍欧美性爱视频、耐磨性差的矛盾久久狠狠高潮亚洲精品，并能克服焊道之間的軟化現(xiàn)象，使堆焊表面硬度較為均勻国产91色，對耐磨件欧美性三级网站，譬如精軋輥的堆焊具有重要意義。

4 Ph stainless steel -- Is a martensitic precipitation /age hardening stainless steel offering high strength and hardness.

17.4PH不銹鋼--是一種經(jīng)過沉降凝結(jié)亚洲精品第五页第六页；老化硬化處理的馬氏體不銹鋼不卡综合色呦呦，具有很高的硬度。

The influence of secondary carbides precipitation and transformation on hardening behavior of a 14Cr-1Mo-1.5V cast iron in sub-critical treatment was studied using optical microscope, transmission electron microscopy and X-ray diffraction.

為了揭示高鉻耐磨鑄鐵硬化的微觀機制亚洲高清偷拍一区二区，提高其使用性能www.99re.8com，采用光學(xué)顯微鏡、透射電鏡和X射線衍射研究15Cr-1Mo-1.5V高鉻鑄鐵中二次碳化物的析出和轉(zhuǎn)變對其亞臨界處理硬化行為的影響影音先锋中文无码资源区。