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说case hardening的其实那是以前。 我的翻译：史外甥以前是用case hardening来增加击锤和扳机的表面硬度，延长寿命。 当2-30年代廉价的西班牙左轮来竞争的时候，史外甥为了让他们的枪一眼就能看出去跟那些便宜山寨货的不同，他们把这个“烧焦了”的颜色给注册成商标了，这样如果西班牙的枪也用case hardening，那将会是商标侵权；如果不用那一眼就能看出来不同。 现在史外甥用的是MIM金属射出成型的技术，扳机硬度已经是里外都一样高了，无需case hardening了，但他们的注册商标还是要维持（商标和专利不一样，不会自动作废，但不再用了就作废），所以他们用staining染色的办法让扳机和击锤还看上去像做了case hardening的样子，烧焦了的。链接见下：
For a century or more, S&W used color case hardening on its hammers and triggers so they would not wear out and would keep the fine edges needed for a good trigger pull, while retaining a softer center that would be durable overall.
When cheap Spanish imitations of the S&W were imported in the 1920's and 1930's, one way S&W took to keep the foreign guns from being passed off as S&W's was to trademark that coloring. If the Spanish makers copied the coloring, their guns could be banned from import for a trademark violation; if they didn't, their guns would not look like S&W's.
But when S&W went to MIM parts, case hardening was no longer needed; the MIM parts are hard all the way through. But S&W wanted to retain the colored hammer and trigger because they are trademarked, so they took to staining the parts. (A patent expires; a trademark does not, unless a company stops using it, so S&W had to keep using colored hammers and triggers on at least some guns.)
https://thefiringline.com/forums/showthread.php?t=542411 |
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发表于 2020-5-19 08:23