欢迎来到聊城福瑞营物资有限公司网站!
公司简介 联系我们
微信扫一扫
联系方式
服务热线:

服务热线:

131-6540-1858

您现在所在的位置: 首页 - 新闻中心 > 公司动态 >

耐磨板氢脆化的研究动向有哪些?

所属分类:公司动态 发布时间:2021-04-20 来源:https://www.lcnaimoban.com/ 浏览量:

氢脆化的敏感性越来越明显。板条状马氏体是低、中碳钢的高强度组织。板条状马氏体中的初期奥氏体晶粒按照不同显微组织单位,可分为板条状、块状和片状。以前,对耐磨板的氢脆化现象与马氏体显微组织的关系进行了调查。结果可知,氢脆化产生的断裂是原始奥氏体晶界附近生成的裂纹沿板条状晶界和块状晶界传播而产生的。有研究报告从结晶学方面对碳量不同的中碳马氏体的氢脆化断裂面进行了解析,由此明确了随着马氏体强度的提高,氢脆化的断裂形态会发生变化。
The sensitivity of hydrogen embrittlement is more and more obvious. Lath martensite is a high strength structure of low and medium carbon steel. The initial austenite grains in lath martensite can be divided into lath, block and sheet according to different microstructure units. Previously, the relationship between hydrogen embrittlement and martensite microstructure was investigated. The results show that the fracture caused by hydrogen embrittlement is caused by the propagation of cracks near the original austenite grain boundary along the strip and block grain boundaries. Some research reports have analyzed the hydrogen embrittlement fracture surface of medium carbon martensite with different carbon content from the aspect of crystallography. It is clear that the fracture morphology of hydrogen embrittlement will change with the increase of martensite strength.
众所周知,在耐磨板中析出的V、Mo和Ti等微细合金碳化物可有效捕获从环境中侵入的氢,从而提高耐磨板的抗延迟断裂特性。有研究报告指出这种氢的捕获量与合金碳化物的析出强度有良好的相互关系,这意味着氢被捕获的主要因素是共格应变磁场。与合金碳化物一样,Fe碳化物也可有效捕获氢,但未见这方面的研究报告。因此,有研究报告就回火温度对高Si添加量马氏体钢的氢捕获行为的影响进行了调查。
Mn13耐磨板
It is well known that V, Mo, Ti and other micro alloy carbides precipitated in the wear-resistant plate can effectively capture the hydrogen invading from the environment, thus improving the delayed fracture resistance of the wear-resistant plate. It has been reported that there is a good correlation between the amount of hydrogen trapped and the precipitation strength of carbide, which means that the main factor of hydrogen trapped is coherent strain magnetic field. Like alloy carbides, Fe carbides can also effectively capture hydrogen, but there is no report on this aspect. Therefore, the effect of tempering temperature on hydrogen capture behavior of martensitic steel with high Si content has been investigated.
大家知道,冷拉丝用珠光体钢即使抗拉强度超过1800MPa,也具有良好的抗延迟断裂特性。其理由有以下两个:一是包藏的氢不仅可以作为扩散性氢捕获,而且可以作为无害的非扩散性捕获;二是生长的晶粒可以抑制裂纹的发展。另一方面,还有研究报告指出,作为影响氢脆化的因素有位错和氢的相互作用,及伴随这种相互作用而形成的共格缺陷。因此,为提高位错的稳定度,有研究报告研究了在改变冷拉丝用珠光体钢的时效条件后,对提高位错的稳定度、氢包藏特性和延迟断裂特性的影响。
As we all know, pearlitic steel for cold drawing has good delayed fracture resistance even if its tensile strength exceeds 1800mpa. There are two reasons: one is that the entrapped hydrogen can be captured not only as diffusive hydrogen, but also as harmless non diffusive hydrogen; the other is that the growth of grains can inhibit the development of cracks. On the other hand, some research reports have pointed out that the interaction between dislocation and hydrogen and the coherent defects formed with this interaction are the factors influencing hydrogen embrittlement. Therefore, in order to improve the stability of dislocations, some research reports have studied the effect of changing the aging conditions of pearlite steel for cold drawing on improving the stability of dislocations, hydrogen entrapment characteristics and delayed fracture characteristics.
马氏体钢板是耐磨板之一,具有很高的氢脆化敏感性。低、中碳素耐磨板中出现的马氏体由显微组织大小不同的板条状组织、块状组织、片状组织和原始奥氏体晶粒构成。以前,人们就知道了低碳马氏体钢板的氢脆化产生的断裂是原始奥氏体晶界附近的发生的裂纹沿板条状晶界或块状晶界传播而产生的。有研究者通过改变母相奥氏体的晶粒,研究了马氏体显微组织对氢脆化行为的影响。
Martensitic steel plate is one of wear-resistant plates with high sensitivity to hydrogen embrittlement. The martensite in low and medium carbon wear-resistant plates is composed of lath structure, block structure, sheet structure and original austenite grain with different microstructure sizes. Previously, it has been known that hydrogen embrittlement fracture of low carbon martensitic steel plate is caused by the propagation of cracks near the original austenite grain boundary along the strip or block grain boundary. The effect of martensite microstructure on hydrogen embrittlement behavior was studied by changing the grain size of parent austenite.
以上的精彩内容均有Mn13耐磨板为您提供,更多的精彩内容请查看我们的网站:https://www.lcnaimoban.com,我们后续会有更多的精彩内容为您呈现。
All the above wonderful contents are provided by Mn13 wear resistant plate. For more wonderful contents, please check our website: https://www.lcnaimoban.com We will have more wonderful content for you in the future.
热门产品 / HOT PRODUCT
新闻推荐 / NEWS RECOMMEND ATIONS