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本文综合介绍了该钢的成份选择要点,热处理性能(包括机械性能,试验室模拟试验和大截面解剖性能)和焊接性能。表明Cr8CuMo钢主要特点为:强度高、有较好的综合性能和大截面性能;各项水下性能远优于低合金钢和碳钢,而和不锈钢相接近;在正火和回火状态下,配奥207或奥237焊条,具有良好的可焊性。在大型机组焊接或施工现场温度较低时,采用低温预热和后热(≤100℃)是有益的。本文并简单介绍一些转轮的实际生产工艺经验,从中表明Cr8CuMo钢具有良好的工艺性能。其中一些转轮已投入使用,初步已获得较满意的效果。可进一步在水轮机转轮和泥泵等水力机械上推广使用。
This article presents an overview of the ingredients selected for the steel, heat treatment properties (including mechanical properties, laboratory simulation tests and large cross-sectional anatomical properties) and weldability. The results show that the main features of Cr8CuMo steel are as follows: high strength, good overall performance and large cross-section performance; the underwater performance is much better than low alloy steel and carbon steel, but close to stainless steel; in normalizing and tempering , With Austrian 207 or Austria 237 electrode, with good solderability. It is beneficial to use low temperature preheat and afterheat (≤100 ° C) when large units are being welded or at construction site temperatures are low. This article also briefly introduces some of the actual experience of the production process runner, from which shows that Cr8CuMo steel has good process performance. Some of the runners have been put into operation, initially have been more satisfactory results. Can further promote the use of water turbines and mud pumps and other hydraulic machinery.